反应详情

By the procedure of Example 4, 8.52 g (60 mmol) of cyclohexyl urea was reacted with 10.9 g (50 mmol) of ethyl 2-chloro-4,4,4-trifluoroacetoacetate at 140°-150° C. for 72 hours. The product was separated and then recrystallized several times from methylcyclohexane to yield 5.92 g of a fine white powder product (m.p.=73°-74° C.) identified in Table I.

1. customThe product was separated
2. customrecrystallized several times from methylcyclohexane