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|Title:||Process for preparing 2-substituted benzo [B] Thiophene compounds and intermediates thereof|
|Abstract:||The present invention provides processes for preparing compounds of formula I ##STR1## and for preparing compounds of formula VII ##STR2## Also provided are processes for preparing compounds of formula VII in addition to intermediates of formula IX ##STR3## wherein R.sup.1' is --OH, or --OR.sup.3, in which R.sup.3 is a hydroxy protecting group; and Z is bromo, iodo, triflate, or --B(OH).sub.2.|
|Inventor(s):||Hauser; Kenneth L. (Greencastle, IN), Palkowitz; Alan D. (Carmel, IN), Sall; Daniel J. (Greenwood, IN), Thrasher; Kenneth J. (Indianapolis, IN)|
|Assignee:||Eli Lilly and Company (Indianapolis, IN)|
|Filing Date:||Oct 27, 1995|
|Claims:||1. A process for preparing a compound of formula VII ##STR26## comprising a) forming a 2-position boronic acid derivative of a compound of formula II ##STR27## and b) coupling the reaction product from step a), a compound of formula III ##STR28## with a compound of formula IV ##STR29## c) acylating the reaction product from step b) a compound of formula I ##STR30## with a compound of formula VIII ##STR31## wherein R.sup.1 is --H, --OH, or --OR.sup.3, in which R.sup.3 is a hydroxy protecting group; |
R.sup.2 is --H, --OH, or OR.sup.4, in which R.sup.4 is a hydroxy protecting group;
R.sup.5 is 1-piperidinyl, 1-pyrrolidinyl, methyl-1-pyrrolidinyl, dimethyl-1-pyrrolidinyl, 4-morpholino, dimethylamino, diethylamino, diisopropylamino, or 1-hexamethyleneimino;
R.sup.6 is bromo, chloro, iodo, or an activating ester group;
n is 2 or 3; and
X is bromo, iodo, or triflate;
d) optionally removing the R.sup.3 and/or R.sup.4 hydroxy protecting groups; and
e) optionally forming a pharmaceutically acceptable salt of said formula VII compound.
2. The process of claim 1 for preparing the intermediate compound of formula I ##STR32## wherein steps a) and b) of claim 1 are replaced by steps a) selectively brominating, iodinating or triflating a compound of formula II ##STR33## to provide a compound of formula V ##STR34## and b) coupling the product of step a) with a compound of formula VI ##STR35## wherein R.sup.1, R.sup.2 and X are defined therein.
3. A process according to claim 2 wherein R.sup.1 and R.sup.2 of said formula VII compound each are --OH.
4. A process according to claim 3 wherein n is 2 and R.sup.5 is 1-piperidinyl.
5. A process according to claim 4 wherein said pharmaceutically acceptable salt is the hydrochloride salt.
6. A process according to claim 5 wherein R.sup.6 is bromo or chloro.
7. A process according to claim 1 wherein R.sup.1 and R.sup.2 of said formula VII compound each are --OH.
8. A process according to claim 7 wherein n is 2 and R.sup.5 is 1-piperidinyl.
9. A process according to claim 8 wherein said pharmaceutically acceptable salt is the hydrochloride salt.
10. A process according to claim 9 wherein R.sup.6 is bromo or chloro.
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