反应详情

A solution of 3-benzyloxy-4-methoxybenzonitrile (43.8 g, 0.18 mol) in glacial acetic acid (87 ml) was added dropwise to concentrated nitric acid (70% w/w, 244 ml) with periodic cooling to maintain the reaction temperature below 30° C. Once the addition was complete, the reaction was stirred for a further 30 minutes, after which time the mixture was poured into water (11) and stirred for 30 minutes. The resulting precipitate was isolated by filtration, washed with water and dried under reduced pressure at 50° C. to afford the subtitle compound as a white solid (35.1 g, 68%). Rf 0.70 (EtOAc:hexane 1:1, v/v).

1. temperaturewith periodic cooling
2. temperatureto maintain the reaction temperature below 30° C
3. additionOnce the addition
4. stirringstirred for 30 minutes
5. customThe resulting precipitate was isolated by filtration
6. washwashed with water
7. customdried under reduced pressure at 50° C.