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Last Updated: March 29, 2024

Details for Patent: 6,048,859


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Title: Morpholine and thiomorpholine tachykinin receptor antagonists
Abstract:Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
Inventor(s): Dorn; Conrad P. (Plainfield, NJ), Finke; Paul E. (Milltown, NJ), Hale; Jeffrey J. (Westfield, NJ), Maccoss; Malcolm (Freehold, NJ), Mills; Sander G. (Woodbridge, NJ), Shah; Shrenik K. (Metuchen, NJ), Chambers; Mark Stuart (Harts, GB), Harrison; Timothy (Great Dunmow, GB), Ladduwahetty; Tamara (Buckhurst Hill, GB), Williams; Brian John (Great Dunnow, GB)
Assignee: Merck & Co., Inc. (Rahway, NJ)
Filing Date:Feb 16, 1999
Application Number:09/251,190
Claims:1. A method for the prevention or treatment of emesis in a mammal in need thereof which comprises the administration to the mammal of an effective amount of: a 5HT.sub.3 receptor antagonist in conjunction with a compound of the structural formula: ##STR19## or a pharmaceutically acceptable salt thereof, wherein: R.sup.1 is selected from the group consisting of:

(1) hydrogen;

(2) C.sub.1-6 alkyl, unsubstituted or substituted with one or more of the substituents selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo, wherein halo is fluoro, chloro, bromo or iodo,

(h) --NR.sup.9 R.sup.10, wherein R.sup.9 and R.sup.10 are independently selected from:

(i) hydrogen,

(ii) C.sub.1-6 alkyl,

(iii) hydroxy-C.sub.1-6 alkyl, and

(iv) phenyl,

(i) --NR.sup.9 COR.sup.10,

(j) --NR.sup.9 CO.sub.2 R.sup.10,

(k) --CONR.sup.9 R.sup.10,

(l) --COR.sup.9,

(m) --CO.sub.2 R.sup.9,

(n) heterocycle, wherein the heterocycle is selected from the group consisting of:

(A) benzimidazolyl,

(B) benzofuranyl,

(C) benzothiophenyl,

(D) benzoxazolyl,

(E) furanyl,

(F) imidazolyl,

(G) indolyl,

(H) isooxazolyl,

(I) isothiazolyl,

(J) oxadiazolyl,

(K) oxazolyl,

(L) pyrazinyl,

(M) pyrazolyl,

(N) pyridyl,

(O) pyrimidyl,

(P) pyrrolyl,

(Q) quinolyl,

(R) tetrazolyl,

(S) thiadiazolyl,

(T) thiazolyl,

(U) thienyl,

(V) triazolyl,

(W) azetidinyl,

(X) 1,4-dioxanyl,

(Y) hexahydroazepinyl,

(Z) piperazinyl,

(AA) piperidinyl,

(AB) pyrrolidinyl,

(AC) tetrahydrofuranyl, and

(AD) tetrahydrothienyl,

and wherein the heterocycle is unsubstituted or substituted with one or more substituent(s) selected from:

(i) C.sub.1-6 alkyl, unsubstituted or substituted with halo, --CF.sub.3, --OCH.sub.3, or phenyl,

(ii) C.sub.1-6 alkoxy,

(iii) oxo,

(iv) hydroxy,

(v) thioxo,

(vi) --SR.sup.9,

(vii) halo,

(viii) cyano,

(ix) phenyl,

(x) trifluoromethyl,

(xi) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10, wherein m is 0, 1 or 2,

(xii) --NR.sup.9 COR.sup.10,

(xiii) --CONR.sup.9 R.sup.10,

(xiv) --CO.sub.2 R.sup.9, and

(xv) --(CH.sub.2).sub.m --OR.sup.9 ;

(3) C.sub.2-6 alkenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo,

(h) --CONR.sup.9 R.sup.10,

(i) --COR.sup.9,

(j) --CO.sub.2 R.sup.9,

(k) heterocycle;

(4) C.sub.2-6 alkynyl;

(5) phenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) C.sub.1-6 alkoxy,

(c) C.sub.1-6 alkyl,

(d) C.sub.2-5 alkenyl,

(e) halo,

(f) --CN,

(g) --NO.sub.2,

(h) --CF.sub.3,

(i) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10,

(j) --NR.sup.9 COR.sup.10,

(k) --NR.sup.9 CO.sub.2 R.sup.10,

(l) --CONR.sup.9 R.sup.10,

(m) --CO.sub.2 NR.sup.9 R.sup.10,

(n) --COR.sup.9, and

(o) --CO.sub.2 R.sup.9 ;

R.sup.2 and R.sup.3 are independently selected from the group consisting of:

(1) hydrogen,

(2) C.sub.1-6 alkyl, unsubstituted or substituted with one or more of the substituents selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo,

(h) --NR.sup.9 R.sup.10,

(i) --NR.sup.9 COR.sup.10,

(j) --NR.sup.9 CO.sub.2 R.sup.10,

(k) --CONR.sup.9 R.sup.10,

(l) --COR.sup.9, and

(m) --CO.sub.2 R.sup.9 ;

(3) C.sub.2-6 alkenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo,

(h) --CONR.sup.9 R.sup.10,

(i) --COR.sup.9, and

(j) --CO.sub.2 R.sup.9 ;

(4) C.sub.2-6 alkynyl;

(5) phenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) C.sub.1-6 alkoxy,

(c) C.sub.1-6 alkyl,

(d) C.sub.2-5 alkenyl,

(e) halo,

(f) --CN,

(g) --NO.sub.2,

(h) --CF.sub.3,

(i) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10,

(j) --NR.sup.9 COR.sup.10,

(k) --NR.sup.9 CO.sub.2 R.sup.10,

(l) --CONR.sup.9 R.sup.10,

(m) --CO.sub.2 NR.sup.9 R.sup.10,

(n) --COR.sup.9, and

(o) --CO.sub.2 R.sup.9 ;

R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of:

(1) hydrogen;

(2) C.sub.1-6 alkyl, unsubstituted or substituted with one or more of the substituents selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo,

(h) --NR.sup.9 R.sup.10,

(i) --NR.sup.9 COR.sup.10,

(j) --NR.sup.9 CO.sub.2 R.sup.10,

(k) --CONR.sup.9 R.sup.10,

(l) --COR.sup.9, and

(m) --CO.sub.2 R.sup.9 ;

(3) C.sub.2-6 alkenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) oxo,

(c) C.sub.1-6 alkoxy,

(d) phenyl-C.sub.1-3 alkoxy,

(e) phenyl,

(f) --CN,

(g) halo,

(h) --CONR.sup.9 R.sup.10,

(i) --COR.sup.9, and

(j) --CO.sub.2 R.sup.9 ;

(4) C.sub.2-6 alkynyl;

(5) phenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(a) hydroxy,

(b) C.sub.1-6 alkoxy,

(c) C.sub.1-6 alkyl,

(d) C.sub.2-5 alkenyl,

(e) halo,

(f) --CN,

(g) --NO.sub.2,

(h) --CF.sub.3,

(i) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10,

(j) --NR.sup.9 COR.sup.10,

(k) --NR.sup.9 CO.sub.2 R.sup.10,

(l) --CONR.sup.9 R.sup.10,

(m) --CO.sub.2 NR.sup.9 R.sup.10,

(n) --COR.sup.9, and

(o) --CO.sub.2 R.sup.9 ;

(6) halo,

(7) --CN,

(8) --CF.sub.3,

(9) --NO.sub.2,

(10) --SR.sup.14, wherein R.sup.14 is hydrogen or C.sub.1-5 alkyl,

(11) --SOR.sup.14,

(12) --SO.sub.2 R.sup.14,

(13) NR.sup.9 COR.sup.10,

(14) CONR.sup.9 COR.sup.10,

(15) NR.sup.9 R.sup.10,

(16) NR.sup.9 CO.sub.2 R.sup.10,

(17) hydroxy,

(18) C.sub.1-6 alkoxy,

(19) COR.sup.9,

(20) CO.sub.2 R.sup.9,

(21) 2-pyridyl,

(22) 3-pyridyl,

(23) 4-pyridyl,

(24) 5-tetrazolyl,

(25) 2-oxazolyl, and

(26) 2-thiazolyl;

R.sup.11, R.sup.12 and R.sup.13 are independently selected from the definitions of R.sup.6, R.sup.7 and R.sup.8 ;

X is selected from the group consisting of:

(1) --O--,

(2) --S--,

(3) --SO--, and

(4) --SO.sub.2 --;

Y is selected from the group consisting of:

(1) a single bond,

(2) --O--,

(3) --S--,

(4) --CO--,

(5) --CH.sub.2 --,

(6) --CHR.sup.15 --, and

(7) --CR.sup.15 R.sup.16 --, wherein R.sup.15 and R.sup.16 are independently selected from the group consisting of:

(a) C.sub.1-6 alkyl, unsubstituted or substituted with one or more of the substituents selected from:

(i) hydroxy,

(ii) oxo,

(iii) C.sub.1-6 alkoxy,

(iv) phenyl-C.sub.1-3 alkoxy,

(v) phenyl,

(vi) --CN,

(vii) halo,

(viii) --NR.sup.9 R.sup.10,

(ix) --NR.sup.9 COR.sup.10,

(x) --NR.sup.9 CO.sub.2 R.sup.10,

(xi) --CONR.sup.9 R.sup.10,

(xii) --COR.sup.9, and

(xiii) --CO.sub.2 R.sup.9 ;

(b) phenyl, unsubstituted or substituted with one or more of the substituent(s) selected from:

(i) hydroxy,

(ii) C.sub.1-6 alkoxy,

(iii) C.sub.1-6 alkyl,

(iv) C.sub.2-5 alkenyl,

(v) halo,

(vi) --CN,

(vii) --NO.sub.2,

(viii) --CF.sub.3,

(ix) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10,

(x) --NR.sup.9 COR.sup.10,

(xi) --NR.sup.9 CO.sub.2 R.sup.10,

(xii) --CONR.sup.9 R.sup.10,

(xiii) --CO.sub.2 NR.sup.9 R.sup.10,

(xiv) --COR.sup.9, and

(xv) --CO.sub.2 R.sup.9 ;

Z is hydrogen or C.sub.1-6 alkyl.

2. The method of claim 1 wherein the compound:

R.sup.1 is C.sub.1-6 alkyl, substituted with one or more of the substituents selected from:

heterocycle, wherein the heterocycle is selected from the group consisting of:

(A) benzimidazolyl,

(B) imidazolyl,

(C) isooxazolyl,

(D) isothiazolyl,

(E) oxadiazolyl,

(F) pyrazinyl,

(G) pyrazolyl,

(H) pyridyl,

(I) pyrrolyl,

(J) tetrazolyl,

(K) thiadiazolyl,

(L) triazolyl, and

(M) piperidinyl,

and wherein the heterocycle is unsubstituted or substituted with one or more substituent(s) selected from:

(i) C.sub.1-6 alkyl, unsubstituted or substituted with halo, --CF.sub.3, --OCH.sub.3, or phenyl,

(ii) C.sub.1-6 alkoxy,

(iii) oxo,

(iv) thioxo,

(v) cyano,

(vi) --SCH.sub.3,

(vii) phenyl,

(viii) hydroxy,

(ix) trifluoromethyl,

(x) --(CH.sub.2).sub.m --NR.sup.9 R.sup.10, wherein m is 0, 1 or 2, and wherein R.sup.9 and R.sup.10 are independently selected from:

(I) hydrogen,

(II) C.sub.1-6 alkyl,

(III) hydroxy-C.sub.1-6 alkyl, and

(IV) phenyl,

(xi) --NR.sup.9 COR.sup.10, and

(xii) --CONR.sup.9 R.sup.10.

3. The method of claim 1 wherein the compound:

R.sup.2 and R.sup.3 are independently selected from the group consisting of:

(1) hydrogen,

(2) C.sub.1-6 alkyl,

(3) C.sub.2-6 alkenyl, and

(4) phenyl;

R.sup.6, R.sup.7 and R.sup.8 are independently selected from the group consisting of:

(1) hydrogen,

(2) C.sub.1-6 alkyl,

(3) fluoro,

(4) chloro,

(5) bromo,

(6) iodo, and

(7) --CF.sub.3 ;

R.sup.11, R.sup.12 and R.sup.13 are independently selected from the group consisting of:

(1) hydrogen,

(2) C.sub.1-6 alkyl,

(3) fluoro,

(4) chloro,

(5) bromo,

(6) iodo, and

(7) --CF.sub.3 ;

X is --O--;

Y is --O--; and

Z is hydrogen or C.sub.1-4 alkyl.

4. The method of claim 1 wherein the compound:

Z is C.sub.1-4 alkyl.

5. The method of claim 1 wherein the compound:

Z is --CH.sub.3.

6. The method of claim 1 wherein the compound:

R.sup.1 is selected from the group consisting of: ##STR20##

7. The method of claim 1 wherein the compound: R.sup.1 is selected from the group consisting of:

(1,2,4-triazolo)methyl; and

(5-oxo-1H,4H-1,2,4-triazolo)methyl.

8. The method of claim 1 wherein the compound:

R.sup.1 is selected from the group consisting of:

(1,3-imidazolo)methyl; and

(2-oxo-1,3-imidazolo)methyl.

9. The method of claim 1 wherein the compound is of the structural formula: ##STR21## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13, Y and Z are as defined in claim 1.

10. The method of claim 1 wherein the compound is of the structural formula II: ##STR22## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13 and Z are as defined in claim 1.

11. The method of claim 1 wherein the compound is of the structural formula III: ##STR23## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13 and Z are as defined in claim 1.

12. The method of claim 1 wherein the compound is of the structural formula: ##STR24## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13, Y and Z are as defined in claim 1.

13. The method of claim 1 wherein the compound is of the structural formula: ##STR25## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13, Y and Z are as defined in claim 1.

14. The method of claim 1 wherein the compound is of the structural formula: ##STR26## or a pharmaceutically acceptable salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.6, R.sup.7, R.sup.8, R.sup.11, R.sup.12, R.sup.13, Y and Z are as defined in claim 1.

15. A method for the prevention or treatment of emesis in a mammal in need thereof which comprises the administration to the mammal of an effective amount of: a 5HT3 receptor antagonist in conjunction with a compound which is selected from the group consisting of:

1) (+/-)-2-(3,5-bis(trifluoromethyl)benzyloxy)-3-phenyl-morpholine;

2) (2R,S)-(3,5-bis(trifluoromethyl)benzyloxy)-(3R)-phenyl-(6R)-methyl-morphol ine;

3) (2R,S)-(3,5-bis(trifluoromethyl)benzyloxy)-(3S)-phenyl-(6R)-methyl-morphol ine;

4) (+/-)-2-(3,5-bis(trifluoromethyl)benzyloxy)-3-phenyl-4-methylcarboxamido-m orpholine;

5) (+/-)-2-(3,5-bis(trifluoromethyl)benzyloxy)-3-phenyl-4-methoxycarbonylmeth yl-morpholine;

6) 2-(2-(3,5-bis(trifluoromethyl)phenyl)ethenyl)-3-phenyl-5-oxo-morpholine;

7) 3-phenyl-2-(2-(3,5-bis(trifluoromethyl)phenyl)-ethyl)-morpholine;

8) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-6-(S)-methyl-morpho line;

9) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-6-(S)-methyl-morpho line;

10) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-6-(S)-methyl-morpho line;

11) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-6-(S)-methyl-morpho line;

12) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-5-(R)-methyl-morpho line;

13) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-5-(R)-methyl-morpho line;

14) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-5-(R)-methyl-morpho line;

15) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-5-(R)-methyl-morpho line;

16) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-morpholine;

17) 4-(3-(1,2,4-triazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-( S)-phenyl-morpholine;

18) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(S)-(3,5-bis-(trifluoromethyl)b enzyloxy)-3-(S)-phenyl-morpholine;

19) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-6-(R)-methyl-morpho line;

20) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-6-(R)-methyl-morpho line;

21) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-6-(R)-methyl-morpho line;

22) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-6-(R)-methyl-morpho line;

23) 2-(R)-(3,5-bis(trifluoromethyl)-benzyloxy)-3-(S)-phenyl-5-(S)-methyl-morph oline;

24) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-5-(S)-methyl-morpho line;

25) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-5-(S)-methyl-morpho line;

26) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-5-(R)-phenyl-morpho line;

27) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-phenyl-5-(R)-phenyl-morpho line;

28) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-5-(S)-phenyl-morpho line;

29) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-5-(S)-phenyl-morpho line;

30) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-6-(R)-methyl-3-(S)-phenyl-4-(3-( 1,2,4-triazolo)methyl)-morpholine;

31) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-6-(R)-methyl-4-(3-(5-oxo-1H,4H-1 ,2,4-triazolo)methyl)-3-(S)-phenyl-morpholine;

32) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-phenyl-morpholine;

33) 4-(3-(1,2,4-triazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-( R)-phenyl-morpholine;

34) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(S)-(3,5-bis-(trifluoromethyl)b enzyloxy)-3-(R)-phenyl-morpholine;

35) 4-(2-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoro-methyl)benzyloxy)-3-(R)-p henyl-morpholine;

36) 4-(4-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-ph enyl-morpholine;

37) 4-(aminocarbonylmethyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(R)-ph enyl-morpholine;

38) 4-(2-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-ph enyl-morpholine;

39) 4-(4-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-ph enyl-morpholine;

40) 4-(2-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-ph enyl-6-(R)-methyl-morpholine;

41) 4-(4-(imidazolo)methyl)-2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-ph enyl-6(R)-methyl-morpholine;

42) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-((6-hydroxy)-hexyl)-3-(R)-phen yl-morpholine;

43) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(5-(methylaminocarbonyl)pentyl )-3-(R)-phenyl-morpholine;

44) 4-(3-(1,2,4-triazolo)methyl)-2-(3,5-dimethylbenzyloxy)-3-phenylmorpholine;

45) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(3,5-dimethyl)-benzyloxy)-3-phe nyl-morpholine;

46) 4-(3-(1,2,4-triazolo)methyl)-2-(3,5-di(tert-butyl)-benzyloxy)-3-phenylmorp holine;

47) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(3,5-di(tert-butyl)-benzyloxy)- 3-phenyl-morpholine;

48) 4-(3-(1,2,4-triazolo)methyl)-2-(3-(tert-butyl)-5-methylbenzyloxy)-3-phenyl -morpholine;

49) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(3-(tert-butyl)-5-methylbenzylo xy)-3-phenyl-morpholine;

50) 4-(3-(1,2,4-triazolo)methyl)-2-(3-(trifluoro-methyl)-5-methyl-benzyloxy)-3 -phenyl-morpholine;

51) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(3-(trifluoromethyl)-5-methylbe nzyloxy)-3-phenyl-morpholine;

52) 4-(3-(1,2,4-triazolo)methyl)-2-(3-(tert-butyl)-5-(trifluoromethyl)benzylox y)-3-phenyl-morpholine;

53) 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-2-(3-(tert-butyl)-5-(trifluoromet hyl)benzyloxy)-3-phenyl-morpholine;

54) 4-(2-(imidazolo)methyl)-2-(3,5-dimethyl-benzyloxy)-3-phenyl-morpholine;

55) 4-(4-(imidazolo)methyl)-2-(3,5-dimethyl-benzyloxy)-3-phenyl-morpholine;

56) 4-(2-(imidazolo)methyl)-2-(3,5-di(tert-butyl)-benzyloxy)-3-phenyl-morpholi ne;

57) 4-(4-(imidazolo)methyl)-2-(3,5-di(tert-butyl)-benzyloxy)-3-phenyl-morpholi ne;

58) 4-(2-(imidazolo)methyl)-2-(3-(tert-butyl)-5-methylbenzyloxy)-3-phenyl-morp holine;

59) 4-(4-(imidazolo)methyl)-2-(3-(tert-butyl)-5-methylbenzyloxy)-3-phenyl-morp holine;

60) 4-(2-(imidazolo)methyl)-2-(3-(trifluoro-methyl)-5-methylbenzyloxy)-3-pheny l-morpholine;

61) 4-(4-(imidazolo)methyl)-2-(3-(trifluoro-methyl)-5-methylbenzyloxy)-3-pheny l-morpholine;

62) 4-(2-(imidazolo)methyl)-2-(3-(tert-butyl)-5-(trifluoromethyl)benzyloxy)-3- phenyl-morpholine;

63) 2-(S)-(3,5-dichlorobenzyloxy)-3-(S)-phenyl-morpholine;

64) 2-(S)-(3,5-dichlorobenzyloxy)-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-3-( S)-phenylmorpholine;

65) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(methoxycarbonylmethyl)-3-(S)- phenyl-morpholine;

66) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(carboxymethyl)-3-(S)-phenyl-m orpholine;

67) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-((2-aminoethyl)aminocarbonylme thyl)-3-(S)-phenyl-morpholine;

68) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-((3-aminopropyl)amino carbonylmethyl)-3-(S)-phenylmorpholine;

69) 4-benzyl-5-(S),6-(R)-dimethyl-3-(S)-phenylmorpholinone and 4-benzyl-5-(R),6-(S)-dimethyl-3-(S)-phenyl-morpholinone;

70) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-[5-(S),6-(R) or 5-(R),6-(S)-dimethyl]-3-(S)-phenyl-morpholinone;

71) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-[5-(R),6-(S) or 5-(S),6-(R)-dimethyl]-3-(S)-phenyl-morpholinone;

72) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(1,2,4-triazolo)methyl)-[5- (S),6-(R) or 5-(R),6-(S)-dimethyl]-3-(S)-phenyl-morpholinone;

73) 2-(R)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(5-oxo-1H,4H-1,2,4-triazolo ) methyl)-[5-(S),6-(R) or 5-(R),6-(S)-dimethyl]-3-(S)-phenyl-morpholinone;

74) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(1,2,4-triazolo)methyl)-[5- (R),6-(S) or 5-(S),6-(R)-dimethyl]-3-(S)-phenyl-morpholinone;

75) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(3-(5-oxo-1H,4H-1,2,4-triazolo )methyl)-[5-(R),6-(S) or 5-(S),6-(R)-dimethyl]-3-(S)-phenyl-morpholinone;

76) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(2-(1-(4-benzyl)piperidino)eth yl)-3-(S)-phenyl-morpholine;

77) 3-(S)-(4-fluorophenyl)-4-benzyl-2-morpholinone;

78) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-(4-fluorophenyl)-4-benzyl- morpholine;

79) 2-(S)-(3,5-Bis(trifluoromethyl)benzyloxy)-3-(S)-(4-fluorophenyl)morpholine ;

80) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-3-(S)-(4-fluorophenyl)-4-(3-(5-o xo-1H,4H-1,2,4-triazolo)methyl-morpholine;

81) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-((3-pyridyl)methyl carbonyl)-3-(R)-phenyl-morpholine;

82) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(methoxycarbonylpentyl)-3-(R)- phenyl-morpholine;

83) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(carboxypentyl)-3-(R)-phenyl-m orpholine;

84) 2-(S)-(3,5-bis(trifluoromethyl)benzyloxy)-4-(methylaminocarbonylpentyl)-6- oxo-hexyl)-3-(R)-phenyl-morpholine;

85) 2-(R)-(3,5-bis(trifluoromethyl)benzoyloxy)-3-(S)-phenyl-4-benzyl-morpholin e;

86) 2-(R)-(1-(3,5-bis(trifluoromethyl)phenyl)ethenyloxy)-3-(S)-phenyl-4-benzyl -morpholine;

87) 2-(R)-(1-(S)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-morpholi ne;

88) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-morpholi ne;

89) 2-(R)-(1-(S)-(3,5-Bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl-morpholine;

90) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl-morpholine;

93) 2-(R)-(1-(S)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)pheny l-morpholine;

94) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)pheny l-morpholine;

95) 2-(R)-(1-(S)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)pheny l-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methylmorpholine;

96) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)pheny l-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methylmorpholine;

98) 2-(R)-(1-(R)-(1-(3-(methyl)naphthyl))ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3- imidazolo)methyl-morpholine;

99) 2-(R)-(1-(R)-(3-(fluoro)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-mo rpholine;

100) 2-(R)-(1-(R)-(3-(fluoro)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4- (3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

101) 2-(R)-(1-(R)-(3-(chloro)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-mo rpholine;

102) 2-(R)-(1-(R)-(3-(chloro)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4- (3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

103) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

104) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H- 1,2,4-triazolo)methyl)-morpholine;

105) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

106) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo -1H,4H-1,2,4-triazolo)methyl)-morpholine;

107) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

108) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo -1H,4H-1,2,4-triazolo)methyl)-morpholine;

109) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

110) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo- 1H,4H-1,2,4-triazolo)methyl)-morpholine;

111) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

112) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H- 1,2,4-triazolo)methyl)-morpholine;

113) 2-(R)-(1-(R)-(3-(isopropoxy)-5-trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl -morpholine;

114) 2-(R)-(1-(R)-(3-(isopropoxy)-5-trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl -4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

115) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-morphol ine;

116) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5 -oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

117) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-morphol ine;

118) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5 -oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

121) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-phenyl-morpholine ;

122) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-ox o-1H,4H-1,2,4-triazolo)methyl)-morpholine;

123) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-m orpholine;

124) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4 -(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

125) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-morphol ine;

126) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5 -oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

127) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phenyl-morphol ine;

128) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5 -oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

129) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phen yl-morpholine;

130) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phen yl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

131) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-chloro)phenyl)ethoxy)-3-(S)-pheny l-morpholine;

132) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-chloro)phenyl)ethoxy)-3-(S)-pheny l-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

133) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

134) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H- 1,2,4-triazolo)methyl)-morpholine;

135) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

136) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H- 1,2,4-triazolo)methyl)-morpholine;

153) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-morpho line;

154) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-morpholine;

157) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3- (1,2,4-triazolo)methyl)-morpholine;

158) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

161) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(3-( 5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

162) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

165) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-( 2-oxo-1,3-imidazolo)methyl)-morpholine;

166) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

169) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-i midazolo)methyl-morpholine;

170) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(2-imidazolo)methyl-morpholine;

173) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-i midazolo)methyl-morpholine;

174) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(4-imidazolo)methyl-morpholine;

177) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(5-t etrazolo)methyl-morpholine;

178) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(5-tetrazolo)methyl-morpholine;

181) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-o xo-5H-pyrrol-4-yl)methyl-morpholine;

182) 2-(R)-(1-(R)-(2-fluoro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(2-oxo-5H-pyrrol-4-yl)methyl-morpholine;

185) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-morpho line;

186) 2-(R)-1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phen yl-morpholine;

189) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(3-( 1,2,4-triazolo)methyl)-morpholine;

190) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

193) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(3-( 5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

194) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

197) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-( 2-oxo-1,3-imidazolo)methyl)-morpholine;

198) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

201) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-i midazolo)methyl)-morpholine;

202) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(2-imidazolo)methyl)-morpholine;

205) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-i midazolo)methyl-morpholine;

206) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(4-imidazolo)methyl-morpholine;

209) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(5-t etrazolo)methyl-morpholine;

210) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(5-tetrazolo)methyl-morpholine;

213) 2-(R)-(1-(R)-(2-chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-o xo-5H-pyrrol-4-yl)methyl-morpholine;

214) 2-(R)-(1-(R)-(2-Chloro-5-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phe nyl-4-(2-oxo-5H-pyrrol-4-yl)methyl-morpholine;

217) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-morpholine;

218) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

221) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)met hyl)-morpholine;

222) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4-tr iazolo)methyl)-morpholine;

225) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1,2,4-triazo lo)methyl)-morpholine;

226) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo-1H ,4H-1,2,4-triazolo)methyl)-morpholine;

229) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidazol o)methyl)-morpholine;

230) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo-1, 3-imidazolo)methyl)-morpholine;

233) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(2-imidazolo)methyl-mo rpholine;

234) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-imidazolo )methyl-morpholine;

237) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(4-imidazolo)methyl-mo rpholine;

238) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-imidazolo )methyl-morpholine;

241) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(5-tetrazolo)methyl-mo rpholine;

242) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(5-tetrazolo )methyl-morpholine;

245) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-phenyl-4-(2-oxo-5H-pyrrol-4-yl) methyl-morpholine;

246) 2-(R)-(1-(R)-(3-methyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-oxo-5H-py rrol-4-yl)methyl-morpholine;

249) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-morpholine;

250) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

253) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)meth yl-morpholine;

254) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4-tri azolo)methyl-morpholine;

257) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2,4-t riazolo)methyl)-morpholine;

258) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo-1H, 4H-1,2,4-triazolo)methyl)-morpholine;

261) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidazolo )methyl)-morpholine;

262) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo-1,3 -imidazolo)methyl)-morpholine;

265) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(2-imidazolo)methyl-mor pholine;

266) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-imidazolo) methyl-morpholine;

269) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(4-imidazolo)methyl-mor pholine;

270) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-imidazolo) methyl-morpholine;

273) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(5-tetrazolo)methyl-mor pholine;

274) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(5-tetrazolo) methyl-morpholine;

277) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-phenyl-4-(2-oxo-5H-pyrrol-4-yl)m ethyl-morpholine;

278) 2-(R)-(1-(R)-(3-bromo)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-oxo-5H-pyr rol-4-yl)methyl-morpholine;

281) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-morpholine;

282) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

285) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)met hyl)-morpholine;

286) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4-tr iazolo)methyl)-morpholine;

289) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2,4- triazolo)methyl)-morpholine;

290) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo-1H ,4H-1,2,4-triazolo)methyl)-morpholine;

293) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidazol o)methyl)-morpholine;

294) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo-1, 3-imidazolo)methyl)-morpholine;

297) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(2-imidazolo)methyl-mo rpholine;

298) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-imidazolo )methyl-morpholine;

301) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(4-imidazolo)methyl-mo rpholine;

302) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-imidazolo )methyl-morpholine;

305) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(5-tetrazolo)methyl-mo rpholine;

306) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(5-tetrazolo )methyl-morpholine;

309) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-phenyl-4-(2-oxo-5H-pyrrol-4-yl) methyl-morpholine;

310) 2-(R)-(1-(R)-(3-chloro)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-oxo-5H-py rrol-4-yl)methyl-morpholine;

313) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-morpholine;

314) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-morph oline;

317) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(3-1H,4H-1,2, 4-triazolo)methyl-morpholine;

318) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3- (1,2,4-triazolo)methyl-morpholine;

321) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H, 4H-1,2,4-triazolo)methyl)-morpholine;

322) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3- (5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

325) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3 -imidazolo)methyl)-morpholine;

326) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4- (2-oxo-1,3-imidazolo)methyl)-morpholine;

329) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-imidazolo) methyl-morpholine;

330) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2- imidazolo)methyl-morpholine;

333) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(4-imidazolo) methyl-morpholine;

334) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4- imidazolo)methyl-morpholine;

337) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(5-tetrazolo) methyl-morpholine;

338) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(5- tetrazolo)methyl-morpholine;

341) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-phenyl-4-(2-oxo-5H-pyr rol-4-yl)methyl-morpholine;

342) 2-(R)-(1-(R)-(3-trifluoromethyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2- oxo-5H-pyrrol-4-yl)methyl-morpholine;

345) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-morpholine;

346) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

349) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)me thyl)-morpholine;

350) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4-t riazolo)methyl)-morpholine;

353) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2,4 -triazolo)methyl)-morpholine;

354) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo-1 H,4H-1,2,4-triazolo)methyl)-morpholine;

357) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidazo lo)methyl-morpholine;

358) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo-1 ,3-imidazolo)methyl)-morpholine;

361) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-4-(2-imidazolo)methyl-m orpholine;

362) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-imidazol o)methyl-morpholine;

365) 2-(R)-(1-(R)-(3-t-butyl)phenylethoxy)-3-(S)-phenyl-4-(4-imidazolo)methyl-m orpholine;

366) 2-(R)-(1-(R)-(3-(t-butyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-imidaz olo)methyl-morpholine;

369) 2-(R)-(1-(R)-(3-(t-butyl)phenyl)ethoxy)-3-(S)-phenyl-4-(5-tetrazolo)methyl -morpholine;

370) 2-(R)-(1-(R)-(3-(t-butyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(5-tetraz olo)methyl-morpholine;

373) 2-(R)-(1-(R)-(3-(t-butyl)phenyl)ethoxy)-3-(S)-phenyl-4-(2-oxo-5H-pyrrol-4- yl)methyl-morpholine;

374) 2-(R)-(1-(R)-(3-(t-butyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(2-oxo-5H -pyrrol-4-yl)methyl-morpholine;

378) 2-(R)-(1-(R)-(2,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluorophenyl )-morpholine;

379) 2-(R)-(1-(R)-(2,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluorophenyl )-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)morpholine;

380) 2-(R)-(1-(R)-(2,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluorophenyl )-4-(3-(1,2,4-triazolo)methyl)-morpholine;

381)2-(R)-(1-(R)-(2,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluorophe nyl)-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

382) 2-(R)-(1-(R)-(3-(thiomethyl)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

383) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1 ,2,4-triazolo)methyl)-morpholine;

384) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazol o)methyl)-morpholine;

385) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imi dazolo)methyl)-morpholine;

386) 2-(R)-(1-(R)-(3-(thiomethyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-pheny l-morpholine;

387) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl -4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

388) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl -4-(3-(1,2,4-triazolo)methyl)-morpholine;

389) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl -4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

394) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-phenylmorpholine;

395) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H -1,2,4-triazolo)methyl)-morpholine;

396) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triaz olo)methyl)-morpholine;

397) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-i midazolo)methyl)-morpholine;

398) 2-(R)-(1-(R)-(3-(fluoro)-5-(trifluoromethyl)phenyl)-ethoxy)-3-(S)-(4-fluor ophenyl)-morpholine;

399) 2-(R)-(1-(R)-(3-(fluorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

400) 2-(R)-(1-(R)-(3-(fluorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

401) 2-(R)-(1-(R)-(3-(fluorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

402) 2-(R)-(1-(R)-(3-(chloro)-5-(trifluoromethyl)phenyl)-ethoxy)-3-(S)-(4-fluor o)phenyl-morpholine;

403) 2-(R)-(1-(R)-(3-(chlorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

404) 2-(R)-(1-(R)-(3-(chlorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

405) 2-(R)-(1-(R)-(3-(chlorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-(4-fluoro) phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

406) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholi ne;

407) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

408) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1, 2,4-triazolo)methyl)-morpholine;

409) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2- oxo-1,3-imidazolo)methyl)-morpholine;

410) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-m orpholine;

411) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)morpholine;

412) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(3-(1,2,4-triazolo)methyl)-morpholine;

413) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

414) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-m orpholine;

415) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

416) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(3-(1,2,4-triazolo)methyl)-morpholine;

417) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4 -(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

418) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-mo rpholine;

419) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4- (3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

420) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4- (3-(1,2,4-triazolo)methyl)-morpholine;

421) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4- (4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

422) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholi ne;

423) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

424) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1, 2,4-triazolo)methyl)-morpholine;

425) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2- oxo-1,3-imidazolo)methyl)-morpholine;

426) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fl uoro)phenyl-morpholine;

427) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fl uoro)phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

428) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fl uoro)phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

429) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fl uoro)phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

430) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-morpholine;

431) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

432) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

433) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

434) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-morpholine;

435) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

436) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

437) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

438) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl- morpholine;

439) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl- 4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

440) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl- 4-(3-(1,2,4-triazolo)methyl)-morpholine;

441) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl- 4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

442) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluor o)phenyl-morpholine;

443) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluor o)phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

444) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluor o)phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

445) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluor o)phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

446) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-morpholine;

447) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

448) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

449) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

450) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-morpholine;

451) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

452) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

453) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

454) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-morpholine;

455) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

456) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

457) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

458) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-morpholine;

459) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

460) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

461) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-(4-f luoro)phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

462) 2-(R)-(1(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholin e;

463) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

464) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1, 2,4-triazolo)methyl)-morpholine;

465) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2- oxo-1,3-imidazolo)methyl)-morpholine;

466) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholi ne;

467) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5- oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

468) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1, 2,4-triazolo)methyl)-morpholine;

469) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2- oxo-1,3-imidazolo)methyl)-morpholine;

494) 2-(R)-(1-(R)-(3-(thiomethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholi ne;

495) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-o xo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

496) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2 ,4-triazolo)methyl)-morpholine;

497) 2-(R)-(1-(R)-(3-(thiomethylphenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-o xo-1,3-imidazolo)methyl)-morpholine;

498) 2-(R)-(1-(R)-(3-(thiomethyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fl uoro)phenyl-morpholine;

499) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-flu oro)phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

500) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-flu oro)phenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

501) 2-(R)-(1-(R)-(3-(thiomethyl-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-flu oro)phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

506) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morphol ine;

507) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5 -oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

508) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1 ,2,4-triazolo)methyl)-morpholine;

509) 2-(R)-(1-(R)-(3,5-(dimethoxy)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2 -oxo-1,3-imidazolo)methyl)-morpholine;

510) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-phenyl-morpholine;

511) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo )methyl)-morpholine;

512) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)methyl)-mor pholine;

513) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidazolo)methyl )-morpholine;

514) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl morpholine;

515) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo-1H,4H-1,2, 4-triazolo)methyl)-morpholine;

516) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4-triazolo)m ethyl)-morpholine;

517) 2-(R)-(1-(R)-(phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo-1,3-imidaz olo)methyl)-morpholine;

518) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

519) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2, 4-triazolo)methyl)-morpholine;

520) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)m ethyl)-morpholine;

521) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidaz olo)methyl)-morpholine;

522) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

523) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo- 1H,4H-1,2,4-triazolo)methyl)-morpholine;

524) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4- triazolo)methyl)-morpholine;

525) 2-(R)-(1-(R)-(3-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo- 1,3-imidazolo)methyl)-morpholine;

526) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-morpholine;

527) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(5-oxo-1H,4H-1,2, 4-triazolo)methyl)-morpholine;

528) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazolo)m ethyl)-morpholine;

529) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-imidaz olo)methyl)-morpholine;

530) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-morpholine;

531) 2-(R)-(1-(R)-(4-(1fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(5-oxo -1H,4H-1,2,4-triazolo)methyl)-morpholine;

532) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(3-(1,2,4- triazolo)methyl)-morpholine;

533) 2-(R)-(1-(R)-(4-(fluoro)phenyl)ethoxy)-3-(S)-(4-fluoro)phenyl-4-(4-(2-oxo- 1,3-imidazolo)methyl)-morpholine;

534) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3-fluoro)pheny l-morpholine;

535) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3-fluoro)pheny l-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

536) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3-fluoro)pheny l-4-(3-(1,2,4-triazolo)methyl)-morpholine;

537) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3-fluoro)pheny l-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

538) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-difluoro)p henyl-morpholine;

539) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-difluoro)p henyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

540) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-difluoro)p henyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

541) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-difluoro)p henyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

542) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dichloro)p henyl-morpholine;

543) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dichloro)p henyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

544) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dichloro)p henyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

545) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dichloro)p henyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

546) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dimethyl)p henyl-morpholine;

547) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dimethyl)p henyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

548) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dimethyl)p henyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

549) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(3,4-dimethyl)p henyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

550) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-3,4-methylenedi oxyphenyl-morpholine;

551) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-3,4-methylenedi oxyphenyl-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

552) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-3,4-methylenedi oxyphenyl-4-(3-(1,2,4-triazolo)methyl)-morpholine;

553) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-3,4-methylenedi oxyphenyl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

554) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(2-naphthyl)-mo rpholine;

555) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(2-naphthyl)-4- (3-(5-oxo-1H,4H-1,2,4-triazolo)methyl)-morpholine;

556) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(2-naphthyl)-4- (3-(1,2,4-triazolo)methyl)-morpholine;

557) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(2-naphthyl)-4- (4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

558) 2-(R)-(1-(R)-(3-(fluorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-phenyl-4-( 3-(1,2,4-triazolo)methyl)-morpholine;

559) 2-(R)-(1-(R)-(3-(fluorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-phenyl-4-( 4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

560) 2-(R)-(1-(R)-(3-(chlorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-phenyl-4-( 3-(1,2,4-triazolo)methyl)-morpholine;

561) 2-(R)-(1-(R)-(3-(chlorophenyl)-5-(trifluoromethyl)ethoxy)-3-(S)-phenyl-4-( 4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

562) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazo lo)methyl)-morpholine;

563) 2-(R)-(1-(R)-(3,5-(dimethyl)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-im idazolo)methyl)-morpholine;

564) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4 -triazolo)methyl)-morpholine;

565) 2-(R)-(1-(R)-(3-(fluoro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo -1,3-imidazolo)methyl)-morpholine;

566) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(-1H,4 H-1,2,4-triazolo)methyl)-morpholine;

567) 2-(R)-(1-(R)-(3-(chloro)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo -1,3-imidazolo)methyl)-morpholine;

568) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4- triazolo)methyl)-morpholine;

569) 2-(R)-(1-(R)-(3-(bromo)-5-(methyl)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo- 1,3-imidazolo)methyl)-morpholine;

570) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazo lo)methyl)-morpholine;

571) 2-(R)-(1-(R)-(3-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-im idazolo)methyl)-morpholine;

572) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-pheny l-4-(3-(-1H,4H-1,2,4-triazolo)methyl)-morpholine;

573) 2-(R)-(1-(R)-(3-(isopropoxy)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-pheny l-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

574) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(- 1H,4H-1,2,4-triazolo)methyl)-morpholine;

575) 2-(R)-(1-(R)-(3-(chloro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2 -oxo-1,3-imidazolo)methyl)-morpholine;

576) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(- 1H,4H-1,2,4-triazolo)methyl)-morpholine;

577) 2-(R)-(1-(R)-(3-(fluoro)-5-(isopropoxy)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2 -oxo-1,3-imidazolo)methyl)-morpholine;

578) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(-1H, 4H-1,2,4-triazolo)methyl)-morpholine;

579) 2-(R)-(1-(R)-(3-(t-butyl)-5-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-ox o-1,3-imidazolo)methyl)-morpholine;

580) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4 -(3-(-1H,4H-1,2,4-triazolo)methyl)-morpholine;

581) 2-(R)-(1-(R)-(3-(t-butyl)-5-(trifluoromethyl)phenyl)ethoxy)-3-(S)-phenyl-4 -(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

582) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1 ,2,4-triazolo)methyl)-morpholine;

583) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2 -oxo-1,3-imidazolo)methyl)-morpholine;

584) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(- 1H,4H-1,2,4-triazolo)methyl)-morpholine;

585) 2-(R)-(1-(R)-(3,5-(dimethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2 -oxo-1,3-imidazolo)methyl)-morpholine;

586) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phen yl-4-(3-(-1H,4H-1,2,4-triazolo)methyl)-morpholine;

587) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(fluoro)phenyl)ethoxy)-3-(S)-phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

588) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phen yl-4-(3-(-1H,4H-1,2,4-triazolo)methyl)-morpholine;

589) 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)-4-(chloro)phenyl)ethoxy)-3-(S)-phen yl-4-(4-(2-oxo-1,3-imidazolo)methyl)-morpholine;

590) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(-1H,4H-1,2,4 -triazolo)methyl)-morpholine;

591) 2-(R)-(1-(R)-(3,5-(dichloro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-im idazolo)methyl)-morpholine;

592) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(3-(1,2,4-triazo lo)methyl)-morpholine;

593) 2-(R)-(1-(R)-(3,5-(difluoro)phenyl)ethoxy)-3-(S)-phenyl-4-(4-(2-oxo-1,3-im idazolo)methyl)-morpholine;

or a pharmaceutically acceptable salt thereof.

16. A method for the prevention or treatment of emesis in a mammal in need thereof which comprises the administration to the mammal of an effective amount of: a compound which is 2-(R)-(1-(R)-(3,5-bis(trifluoromethyl)phenyl)ethoxy)-3-(S)-(4-fluoro)pheny l-4-(3-(5-oxo-1H,4H-1,2,4-triazolo)methyl-morpholine, or a pharmaceutically acceptable salt thereof, in conjunction with a 5HT.sub.3 receptor antagonist.

17. The method of claim 16 wherein the 5HT.sub.3 receptor antagonist is ondansetron.

18. The method of claim 16 wherein the 5HT.sub.3 receptor antagonist is granisetron.

19. The method of claim 16 wherein the 5HT.sub.3 receptor antagonist is tropisetron.

20. A method for the prevention or treatment of emesis in a mammal in need thereof which comprises the administration to the mammal of an effective amount of: a compound which is ##STR27## or a pharmaceutically acceptable salt thereof, in conjunction with a 5HT.sub.3 receptor antagonist.

21. The method of claim 20 wherein the 5HT.sub.3 receptor antagonist is ondansetron.

22. The method of claim 20 wherein the 5HT.sub.3 receptor antagonist is granisetron.

23. The method of claim 20 wherein the 5HT.sub.3 receptor antagonist is tropisetron.

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