反应详情

温度

50 °C

5-Benzyl-3-n-butyl hydantoin (7.38 g, 0.03 mole) was dissolved in dimethylformamide (50 ml.) and added dropwise with stirring to a suspension of sodium hydride (1.44 g. 50% oil dispersion) in dimethylformamide (20 ml). When gassing ceased, iodomethane (2 ml) was added and the mixture warmed to 50° C. and maintained at 50° C. for 5 hours. The mixture was poured into ice/water (500 ml) and extracted with ether. The ether extract was evaporated in vacuo to give a colourless oil which failed to crystallise and was distilled in a Kugelrohr apparatus to give the title compound (6.6 g; 85%) b.p. 145° C./0.02 mm.

1. additionadded dropwise
2. temperaturemaintained at 50° C. for 5 hours
3. extractionextracted with ether
4. extractionThe ether extract
5. customwas evaporated in vacuo
6. customto give a colourless oil which
7. customto crystallise
8. distillationwas distilled in a Kugelrohr apparatus