反应详情

14.5 g. of 3-trifluoromethyl-4-chlorophenyl-isocyanate and 5.5 g. of α-aminoisobutyronitrile are kept at 100° for 20 minutes. For purification, the viscous oil obtained is chromatographed on 500 g. of silica gel (particle size about 0.06-0.2 mm) using methylene chloride/methanol. The product obtained is crystallized from methylene chloride/petroleum ether. After drying under greatly reduced pressure at 50° for 15 hours, 1-(3-trifluoromethyl-4-chlorophenyl)-5-imino-4,4-dimethyl-2-imidazolidinone, which melts at 148°-149°, is obtained.

1. customFor purification
2. customthe viscous oil obtained
3. customis chromatographed on 500 g
4. customThe product obtained
5. customis crystallized from methylene chloride/petroleum ether
6. customAfter drying under greatly reduced pressure at 50° for 15 hours