m-Chloroperbenzoic acid → 4-Cyclopropylcarbonyl-5-[3-chloro-4-(methylsulphonyl)phenyl]isoxazole

Participants

Reaction Steps

A mixture of 5-[3-chloro4-(methylsulphenyl)phenyl]4-cyclopropylcarbonyl-isoxazole (1.0 g) and 3-chloroperoxybenzoic acid (2.3g, 50%) in dichloromethane was stirred overnight. A saturated solution of sodium bisulphite was added and the layers were separated. The organic phase was washed with sodium bicarbonate solution, water, dried (MgSO4) and filtered. The filtrate was evaporated to dryness to give 4-cyclopropylcarbonyl-5-[3-chloro-4-(methylsulphonyl)phenyl]isoxazole (compound 5, 1.11 g) as a white solid, m.p. 148°-150° C.

Provenance & Evidence