反应详情

A solution of 600 mg. of 2-(4-cyanophenyl)oxazolo[5,4-b]pyridine in 8 ml. of concentrated sulfuric acid was allowed to stand at room temperature for 16 hours. The solution was poured onto ice and the white precipitate was collected on a filter to give 2-(4-carbamylphenyl)oxazolo[5,4-b]pyridine, m.p. 315° C. (dec.).

1. additionThe solution was poured onto ice
2. customthe white precipitate was collected on
3. filtrationa filter