Azolopyrimidinones

Claim 1

The 5H-thiazolo[3,2-a]pyrimidine having the following formula and the salts thereof with pharamaceutically acceptable bases ##STR9## wherein R 2 and R 3 are independently selected from H, the substituent A, or taken together with the carbon atoms to which they are attached denote cycloalkenyl having 5 to 7 ring members and up to 2 ring substituents, benzo, monosubstituted benzo, or di-substituted benzo wherein said substituents are independently defined by A, and A is selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkenoxy, alkanoyl, alkenoyl, alkylsulfonyl, alkylsulfinyl, alkylthio, alkanoamido, cycloalkyl having 3 to 6 ring members and 1 to 3 optional alkyl substituents, cycloalkylalkyl having 3 to 6 ring members and 1 to 3 optional alkyl substituents, wherein each of the foregoing groups has up to 8 carbon atoms, phenyl, phenylmethyl, trifluoromethyl, nitro, amino, hydroxyl, halogen, carbamoyl, cyano, and cyanoalkyl having from 2 to 4 carbon atoms; Tet is 1H-tetrazol-5-yl; and Z is O, S, or NH.