Thionyl Chloride → 4-[1-Cycloheptylidene-1(imidazolyl)methyl]benzonitrile

Participants

Reaction Steps

At 0°, 10 g of crude 4-[1-hydroxycyclohept-1-yl-1-(imidazolyl)methyl]benzonitrile is dissolved in 100 ml of dichloromethane and stirred with 10 ml of thionyl chloride for 4 hours. Then the mixture is concentrated to dryness under an oil pump vacuum, taken up in 100 ml of dichloromethane, and stirred with 40 ml of triethylamine for 18 hours at 25°. For working up purposes, the mixture is combined with water, extracted twice with dichloromethane, dried over sodium sulfate, concentrated to dryness under vacuum, and chromatographed on silica gel with hexane/ethyl acetate, thus producing 2.03 g of 4-[1-cycloheptylidene-1(imidazolyl)methyl]benzonitrile as the oily, free base.

Provenance & Evidence