Patent ID: 7074797

Claim:
A compound of formula or a stereoisomer or pharmaceutically acceptable salt thereof, wherein: R 1 is NR 4 R 5 ; R 2 is C 1-6 alkyl; R 3 is hydrogen, C 1-6 alkyl, C 1-6 alkylsulfonyl, or C 1-6 alkylthio; R 4 is hydrogen, or C 1-6 alkyl; R 5 is C 1-8 alkyl, C 1-6 alkyloxyC 1-6 alkyl, or hydroxyC 1-6 alkyl; and Ar is phenyl; phenyl substituted with 1, 2 or 3 substituents independently selected from halo, C 1-6 alkyl, C 1-6 alkyloxy, amino and mono- and di(C 1-6 alkyl)amino; pyridinyl; pyridinyl substituted with 1, 2 or 3 substituents independently selected from halo, C 1-6 alkyl, C 1-6 alkyloxy, amino, and mono- or di(C 1-6 alkyl)amino; and wherein said substituted phenyl may optionally be further substituted with one or more halogens; with the proviso that 2,5-dimethyl-7-(methylamino)-3-phenyl-pyrazolo[1,5-a]pyrimidine is not included.