Sodium cyanoborohydride → N-[3-(3-cyano-4,5-dihydropyrazolo[1,5-a]pyrimidin-7-yl)phenyl]acetamide

참여 물질

반응 단계

A mixture of 7.0 g of 3'-actamido-3-(N,N-dimethylamino)acrylophenone and 3.3 g. of 3-amino-4-cyanopyrazole in 100 ml of acetic acid was heated at reflux for 8 hours. Crystals that formed on cooling were filtered and dried to give 7.4 g. of N-[3-(3-cyano-pyrazolo[1,5-a]pyrimidin-7-yl)phenyl]acetamide, m.p. 254°-256° C. This was reacted with 14.8 g of sodium cyanoborohydride in 50 ml of acetic acid to give 3.0 g of N-[3-(3-cyano-4,5-dihydropyrazolo[1,5-a]-pyrimidin-7-yl)phenyl]acetamide, m.p. 251°-254° C. This is reacted with chloroacetic anhydride and sodium carbonate in toluene as in Example 3 to give the title compound.

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