| abstract |
The present invention describes 6-aminopyrazolo[3,4- d ]pyrimidines and a novel process for prepaation. The convenient one-pot acid catalytic synthesis of 6-aminopyrazolo[3,4- d ]pyrimidine was developed by the reaction of 1 H -pyrazol-5-yl- N , N -dimethylformamidines, 5-amino-1 H -pyrazole-4-carbaldehydes, and/or N -[(5-amino-1,3-diphenyl-1 H -pyrazol-4-yl)methylene]- cyanamide with cyanamide analogues under acid mediated solution. |