反应详情

N-(3-Amino-phenyl)-2-cyano-3-(1,4-dihydro-1-phenyl-indeno [1,2-c]pyrazol-3-yl)-3-oxo-propanamide (1.8 g) dissolved in dimethylformamide (30 ml) is reacted with acetic anhydride (5 ml) in the presence of pyridine (5 ml) at 40° C. for 8 hours. The reaction mixture is diluted with ice water and the precipitate is filtered and washed with water crystallization from dimethylformamide gives 1.2 g of N-(3-acetylamino-phenyl) -2-cyano-3-(1,4-dihydro-1-phenyl-indeno[1,2-c]pyrazol-3-yl)-3-oxo-propanamide.

1. filtrationthe precipitate is filtered
2. washwashed with water crystallization from dimethylformamide