m-Chloroperbenzoic acid → N-(4-Chlorobenzyl)-1-[2-(ethylsulfinyl)ethyl]-6-(4-morpholinylmethyl)-4-oxo-1,4-dihydro-3-quinolinecarboxamide

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Reaction Steps

A solution of N-(4-chlorobenzyl)-1-[2-(ethylsulfanyl)ethyl]-6-(4-morpholinylmethyl)-4-oxo-1,4-dihydro-3-quinolinecarboxamide (0.10 gm) from Example No. 60 in dichloromethane (2 mL) at 0° C. is added p-toluenesulfonic acid hydrate (0.04 gm) followed by m-chloroperoxybenzoic acid (˜85%) (0.045 gm). The mixture is stirred for 0.5 hrs. The reaction mixture is diluted with dichloromethane, washed with saturated aqueous sodium sulfite, saturated aqueous sodium bicarbonate, brine, dried (Na2SO4) and concentrated under reduced pressure. The crude product is purified by flash column chromatography eluting with 3% to 9% methanol in dichloromethane and then by recrystallization from acetonitrile to afford 0.05 gm of the title compound as a white solid.

Provenance & Evidence