反应详情

Analogously to Example 34, 261 mg (1.00 mmol) of 3amino-4-(3-chlorophenylamino)-1H-pyrazolo[3,4-d]pyrimidine (see Step 1.6), 282 mg (1.5 mmol) of 4-(2-methyl-2H-tetrazol-5-yl)-benzaldehyde and 180 mg of acetic acid are stirred in 39 ml of DMEU/methanol (1:2) at RT for 1 hour and then reacted with two 440 mg (7 mmol) portions of NaCNBH3. 4-(3-Chloro-phenylamino)-3-[4-(2-methyl-tetrazol-5-yl)-benzylamino]-1H-pyrazolo[3,4-d]pyrimidine is obtained; m.p. 232-235° C.; HPLC: tRet(grad20-100/20)=11.4; FAB-MS: (M+H)+=433.