Phenylurea → Ethyl 2-(phenylamino)4(trifluoromethyl)-5-oxazolecarboxylate
Reaction equation
[C:1]1([NH:7][C:8]([NH2:10])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Cl[CH:12]([C:18]([C:20]([F:23])([F:22])[F:21])=O)[C:13]([O:15][CH2:16][CH3:17])=[O:14]>C(Cl)Cl>[C:1]1([NH:7][C:8]2[O:9][C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[C:18]([C:20]([F:21])([F:23])[F:22])[N:10]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
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.