Phosphorus pentachloride → 4-Chloro-7-methoxyquinoline-3-carbonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of 4.0 g (20 mmol) of 1,4-dihydro-7-methoxy-4-oxo-3-quinolinecarbonitrile and 8.3 g (40 mmol) of phosphorous pentachloride was heated at 165° C. for 3 hours. The mixture was diluted with hexanes and the solid was collected. The solid was mixed with brine and dilute sodium hydroxide solution and extracted several times with a mixture of tetrahydrofuran and ethyl acetate. The solution was dried over magnesium sulfate and filtered through a pad of silica gel giving 3.7 g of 4-chloro-7-methoxy-3-quinolinecarbonitrile as a white solid: mass spectrum (electrospray, m/e): M+H 218.9.

Provenance & Evidence