Phenylurea → Ethyl 2-(phenylamino)4(trifluoromethyl)-5-oxazolecarboxylate

Participants

Reaction Steps

By the procedure of Example 4, 8.2 g (60 mmol) of phenyl urea was reacted with 10.9 g (50 mmol) of ethyl 2-chloro-4,4,4-trifluoroacetoacetate at 140°-150° C. for 24 hours. The product mixture was treated with methylene chloride, washed with water, dried and concentrated. The residue was recrystallized from methylcyclohexane to yield 6.2 g of crystal product (m.p.=114°-116° C.) identified in Table I.

Provenance & Evidence