PURINE DERIVATIVES

摘要

The present invention relates to compounds of the class of purin-2-ylcarboxamides, useful as anti-inflammatory agents, having the formula:and pharmaceutically acceptable salts and solvates thereof; wherein R1 is H, C1-C 6 alkyl or C3-C7 cycloalkyl, each optionally substituted by 1 or 2 of hydroxyl, fluorenyl, or optionally substituted phenyl or naphthyl ; A is a bond or C1-C6 alkylene; R2 is (i) H, C1-C6 alkyl, or optionally substituted C3-C7 cycloalkyl, phenyl, or naphthyl; or (ii) when A is C2-C6 alkylene, -NR3R3, -OR3, -COOR3, -OCOR4, -SO2R4, -CN, -SO2NR3R4, -NR3SO2R4, -NR3COR4 or -CONR3R3; or (iii) a C-linked, 4 to 11 membered, mono or bicyclic heterocycle having either from 1 to 4 ring nitrogen atom(s) or 1 or 2 nitrogen and 1 oxygen or 1 sulphur ring atoms, said heterocycle being optionally C-substituted or N-substituted; or (iv) when A is C2-C6 alkylene, optionally substituted N-linked azetidinyl, pyrrolidinyl, morpholinyl, tetrahydroisoquinolinyl, piperidinyl or piperazinyl; R7 is H, C1-C6 alkyl, C3-C7 cycloalkyl, phenyl, naphthyl, azetidin-3-yl, pyrrolidin-3-yl, piperidin-3-yl, piperidin-4-yl, or het; and R8 is H or C1-C6 alkyl; and to intermediates used in processes for the preparation of, compositions containing, and uses as adenosine A2a receptor agonists of, compounds of formula (I).