反应详情

A solution of 1,2-dihydro-5-[4-(1H-imidazol-1-yl)phenyl]-6-methyl-2-oxo-3-pyridinecarbonitrile (5.0 g) in 25 ml of concentrated sulfuric acid is heated on a steam bath for 40 minutes, cooled to room temperature and poured into 150 ml of ice. The mixture is adjusted to pH 8 with concentrated ammonia. The solid is collected and recrystallized successively from 10:1 water/acetic acid, dimethylformamide, and 2-methoxyethanol to give 2.06 g of 1,2-dihydro-5-[4-(1H-imidazol-1-yl)phenyl]-6-methyl-2-oxo-3-pyridinecarboxamide, mp 311°-315° C. (dec).

1. customThe solid is collected
2. customrecrystallized successively from 10:1 water/acetic acid, dimethylformamide, and 2-methoxyethanol