反应详情

To a solution of benzylideneacetophenone (41.6 g) and N-carbamoylmethylpyridinium chloride (34.4 g) (prepared according to the method of O. ALBRECHT et al., Helv. Chim. Acta 24, 241E (1941)) in methanol (600 cc), is added, at room temperature, a 1N aqueous solution of sodium hydroxide (200 cc). The initially yellow solution takes on an orange colour and a yellow solid precipitates. The mixture is stirred at room temperature for 15 minutes and acetic acid (400 cc) is then added. The green solution obtained is stirred for 1 hour at room temperature. The solvent is then distilled in 4 hours under atmospheric pressure. The solid residue obtained is taken up in distilled water (500 cc). After stirring for 1 hour at more temperature, the solid is separated by filtration, washed with distilled water (3×100 cc) and dried under reduced pressure at 60° C. (whitish solid; m.p.=209°-212° C.)

1. customa yellow solid precipitates
2. additionacetic acid (400 cc) is then added
3. customThe green solution obtained
4. stirringis stirred for 1 hour at room temperature
5. distillationThe solvent is then distilled in 4 hours under atmospheric pressure
6. customThe solid residue obtained
7. stirringAfter stirring for 1 hour at more temperature
8. customthe solid is separated by filtration
9. washwashed with distilled water (3×100 cc)
10. customdried under reduced pressure at 60° C. (whitish solid; m.p.=209°-212° C.)