m-Chloroperbenzoic acid → HCID 18980920, compound

Participants

Reaction Steps

To 2.0 g (4.7 mmole) of N-(4-trifluoromethylphenyl)-3-(4-chlorophenyl)-4-methyl-4-acetyl-4,5-dihydro-1H-pyrazole-1-carboxamide (Example 13a) in 10 ml of methylene chloride was added 2 g (9.8 mmole) of 85% 3-chloroperoxybenzoic acid (MCPBA). After standing for 72 hours at room temperature an additional 0.6 g of MCPBA was added and the reaction was let stand an additional 72 hours. The reaction mixture was diluted with diethyl ether, washed with dilute aqueous sodium bisulfite, dilute aqueous sodium bicarbonate, and brine. The resulting solution was dried over anhydrous magnesium sulfate, filtered, concentrated in vacuo, and crystallized from diethyl ether and hexanes to yield the title compound, a white solid, mp 92°-96° C.

Provenance & Evidence