| United States Patent | RE39,112 |
| Asano , et al. | May 30, 2006 |
The present invention provides a preventive or therapeutic agent of a new type for diabetes mellitus and diabetic complications on the basis of an adenosine A2 receptor antagonist action.A purine compound represented by the formula (I), its pharmacologically acceptable salt or hydrates thereof has an adenosine A2 receptor antagonistic action and is useful for prevention or therapy of diabetes mellitus and diabetic complications. In addition, adenosine A2 receptor antagonists having different structures from those of the compounds described above, for example KW6002, are also effective for prevention or therapy of diabetes mellitus and diabetic complications. ##STR00001## In the formula, W is --CH.sub.2CH.sub.2--, or --CH.dbd.CH-- or --C.ident.C--; R.sup.1 is: ##STR00002## (in the formula, X is hydrogen atom, hydroxyl group, a lower alkyl group, a lower alkoxy group, etc.; and R.sup.5 and R.sup.6 are the same as or different from each other and each represents hydrogen atom, a lower alkyl group, a cycloalkyl group, etc.) and the like; R.sup.2 is an amino group, etc. which maybe substituted with a lower alkyl group, etc.; R.sup.3 is a cycloalkyl group, an optionally substituted aryl group, etc.; and R.sup.4 is a lower alkyl group etc. ##STR00003##
| Inventors: | Asano; Osamu (Ushiku, JP), Harada; Hitoshi (Ushiku, JP), Hoshino; Yorihisa (Tsukuba, JP), Yoshikawa; Seiji (Ibaraki, JP), Inoue; Takashi (Tsukuba, JP), Horizoe; Tatsuo (Ushiku, JP), Yasuda; Nobuyuki (Ushiku, JP), Ohashi; Kaya (Tokyo, JP), Nagaoka; Junsaku (Tsukuba, JP), Murakami; Manabu (Tsukuba, JP), Kobayashi; Seiichi (Lexington, MA) |
| Assignee: |
Eisai Co., Ltd.
(Tokyo,
JP)
|
| Appl. No.: | 11/057,854 |
| Filed: | December 24, 1998 |
| PCT Filed: | December 24, 1998 |
| PCT No.: | PCT/JP98/05870 |
| 371(c)(1),(2),(4) Date: | July 05, 2000 |
| PCT Pub. No.: | WO99/35147 |
| PCT Pub. Date: | July 15, 1999 |
| Application Number | Filing Date | Patent Number | Issue Date | ||
| Reissue of: | 09582840 | Jul., 2000 | 06579868 | Jun., 2003 | |
| Jan 05, 1998 [JP] | 10-000526 | |||
| Current U.S. Class: | 514/211.08 ; 514/211.15; 514/227.8; 514/234.2; 514/263.2; 514/263.22; 514/263.3; 514/263.4; 540/481; 540/492; 540/524; 544/118; 544/264; 544/265; 544/277; 544/61 |
| Current International Class: | C07D 473/34 (20060101); A61K 31/52 (20060101); A61K 31/522 (20060101); C07D 473/00 (20060101); C07D 473/30 (20060101) |
| Field of Search: | 540/481,492,524 514/263.4,263.2,227.8,234.2,211.08,211.15,263.3,263.22 544/61,118,264,265,277 |
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