反应详情

By conducting reactions and treatments in the same manner as in Example 42, using 5.8 g of 2-chloro-3-[4-(2-dimethylaminoethylamino)benzoyl]pyridine and 1.2 g of methylhydrazine, converting into the maleate and recrystallizing from ethyl acetate, there was obtained 1-methyl-3-[4-(2-dimethylaminoethylamino)phenyl]-1H-pyrazolo[3,4-b]pyridine·maleate, m.p. 88°-90° C.

1. customrecrystallizing from ethyl acetate