DIRECT DICHLOROVINYLATION OF NITRILES WITH TRICHLOROETHYLENE UNDER PHASE-TRANSFER CATALYSIS CONDITIONS

Reaction of trichloroethylene with nitriles 1a-k, carried out in the p resence of 50% aqueous sodium hydroxide and tetrabutylammonium hydroge n sulfate as a phase-transfer catalyst, in diethyl ether at 5-10 degre es C affords dichlorovinyl derivatives 2a-k in good yields. Deprotecti on of the latent carbonyl group in aminonitrile 1f results in the form ation of dichlorovinyl ketone 5.