反应详情

A mixture of 2.91 g (20 mmol) of 3-chloro-4-fluoroaniline and 3.01 g (21 mmol) of 2-isocyanato-propionic acid ethyl ester was maintained at 130°-140° C. for 91/2 hours. The resulting product was crystallized from chloroform/methanol to yield 3-(3-chloro-4-fluorophenyl)-5-methyl-hydantoin, m.p. 174°-175.5° C.

1. temperaturewas maintained at 130°-140° C. for 91/2 hours
2. customThe resulting product was crystallized from chloroform/methanol