Claims for Patent: 4,444,779

Summary for Patent: 4,444,779

Title:	Thiazolidine derivatives
Abstract:	Thiazolidine derivatives of the general formula: ##STR1## [wherein R.sup.1 is alkyl, cycloalkyl, phenylalkyl, phenyl, a five- or six-membered heterocyclic group including one or two hetero-atoms selected from the group consisting of nitrogen, oxygen and sulfur or a group of the formula ##STR2## (where R.sup.3 and R.sup.4 are the same or different and each is lower alkyl or R.sup.3 and R.sup.4 are combined to each other either directly or as interrupted by a hetero-atom selected from the group consisting of nitrogen, oxygen and sulfur to form a five- or six-membered ring); R.sup.2 means a bond or a lower alkylene group; L.sup.1 and L.sup.2 are the same or different and each is lower alkyl or L.sup.1 and L.sup.2 are combined to form an alkylene group, provided that when R.sup.1 is other than alkyl, L.sup.1 and L.sup.2 may further be hydrogen, respectively] are novel compounds and useful as, for example, remedies for diabetes, hyperlipemia and so on of mammals including human beings.
Inventor(s):	Kawamatsu; Yutaka (Kyoto, JP), Fujita; Takeshi (Takarazuka, JP)
Assignee:	Takeda Chemical Industries, Ltd. (Osaka, JP)
Application Number:	06/476,017
Patent Claims:	1. A thiazolidine derivative of the formula: ##STR79## wherein R.sup.1 is a pyridyl group having 1 to 3 substituents selected from the group consisting of lower alkyls, halogens and hydroxyl on the ring, or a thiazolyl group having 1 to 3 substituents selected from the group consisting of lower alkyls, halogens and hydroxyl on the ring; R.sup.2 means a bond or a lower alkylene group; L.sup.1 and L.sup.2 are the same or different and each is hydrogen, lower alkyl or L.sup.1 and L.sup.2 are combined to form an alkylene group. 2. A thiazolidine derivative as claimed in claim 1, each of L.sup.1 and L.sup.2 is hydrogen. 3. A thiazolidine derivative as claimed in claim 1, wherein R.sup.2 is a lower alkylene group having 1 to 3 carbon atoms. 4. A compound as claimed in claim 1, wherein the compound is 5-{4-[2-(6-methyl-2-pyridyl)ethoxy]benzyl}thiazolidine-2,4-dione. 5. A compound as claimed in claim 1, wherein the compound is 5-{4-[2-(4-methyl-5-thiazolyl)ethoxy]benzyl}thiazolidine-2,4-dione. 6. A hypolipidemic and hypoglycemic pharmaceutical composition, which comprises, as an active ingredient, an effective amount of a thiazolidine derivative defined in claim 1 and a pharamaceutically acceptable carrier therefor.