2,6-Difluorobenzoyl isocyanate → N-[[[4-[2-chloro-4-(trifluoromethyl)phenoxy]-2-fluorophenyl][[(2,6-difluorobenzoyl)amino]carbonyl]amino]thio]-N-methylbutanamide

Participants

Reaction Steps

A solution of 2,6-difluorobenzoylisocyanate (2.0 g) in a 1:1 mixture of toluene and petroleum ether (5 ml) was added at room temperature over 30 minutes to a stirred solution of the compound of Example 3 (4.4 g) in the same solvent (20 ml). After stirring at room temperature for 2 hours, the solid product was filtered off and recrystallised from a mixture of diethyl ether and petroleum ether to give 4.3 g of the desired product, melting point 136°-138° C.

Provenance & Evidence