m-Chloroperbenzoic acid → HCID 22621214, compound

Participants

Reaction Steps

m-Chloroperbenzoic acid (1.81 g of a 50% oil dispersion) was added to a stirred solution of 4-[3-chloro-2-(N-ethyl-N-methoxycarbonylamino)-4-(methylthio)benzoyl]-5-cyclopropyl-isoxazole (compound 35, 0.92 g) in dichloromethane. After 5 hours, a solution of sodium metabisulphite was added and the mixture stirred for 5 minutes. The organic phase was washed with sodium bicarbonate solution and water, dried (anhydrous magnesium sulphate) and evaporated. The residue was triturated (with a hexane/ether solution) to yield 4-[3-chloro-2-(N-ethyl-N-methoxycarbonylamino)-4-methylsulphonylbenzoyl]-5-cyclopropylisoxazole (compound number 48, 0.95 g) as a white solid, m.p. 152°-155.5° C.

Provenance & Evidence