申请人:The United States of America as represented by the Department of Health
公开号:US05861405A1
公开(公告)日:1999-01-19
The present invention provides 8-substituted 1,3,7-trialkylxanthines useful as A.sub.2 -selective adenosine receptor antagonists and compositions comprising such compounds. Examples of the 8-substituted 1,3,7-trialkyl xanthines include: ##STR1## In compound (a), R.sub.1, R.sub.3, and R.sub.7 are methyl and X is one to three substituents, which may be the same or different and selected from the group consisting of amino, C.sub.1 -C.sub.4 alkylcarbonylamino, carboxy C.sub.2 -C.sub.4 alkylcarbonylamino, halo, C.sub.1 -C.sub.3 alkyloxy, amino C.sub.1 -C.sub.4 alkyloxy, C.sub.1 -C.sub.4 alkyloxy carbonylamino, amino C.sub.1 -C.sub.4 alkenyloxy, isothiocyanato, and diazonium tetrafluoroborate. In compound (b), R.sub.1, R.sub.3, and R.sub.7 are methyl, R.sub..beta. is hydrogen or methyl, and X is selected from the group consisting of R, C(.dbd.O)OR, and C(.dbd.O)NH--R, wherein R is a C.sub.1 -C.sub.6 alkyl.
本发明提供了作为A.sub.2选择性腺苷受体拮抗剂有用的8-取代基1,3,7-三烷基黄嘌呤及包含这种化合物的组合物。8-取代基1,3,7-三烷基黄嘌呤的例子包括:##STR1## 在化合物(a)中,R.sub.1,R.sub.3和R.sub.7为甲基,X为1到3个取代基,可以相同或不同,并选自以下组:氨基,C.sub.1-C.sub.4烷基羰基氨基,羧基C.sub.2-C.sub.4烷基羰基氨基,卤素,C.sub.1-C.sub.3烷氧基,氨基C.sub.1-C.sub.4烷氧基,C.sub.1-C.sub.4烷氧基羰基氨基,氨基C.sub.1-C.sub.4烯氧基,异硫氰酸酯和重氮四氟硼酸盐。在化合物(b)中,R.sub.1,R.sub.3和R.sub.7为甲基,R.sub..beta.为氢或甲基,X选自以下组:R,C(.dbd.O)OR和C(.dbd.O)NH--R,其中R为C.sub.1-C.sub.6烷基。