Abstract
The preparation of 1-chloro-1-chalcogeno(sulfur, selenium) alkenes by a Wittig-type reaction in an one pot procedure is described. Chlorochalcogenyl triphenylphosphoranes are formed in situ by the reaction of dichloromethyl phenylchalcogenide, potassium t-butoxide and triphenylphosphine. They react with aldehydes to give 1-chlorovinyl chalcogenides as a mixture of isomers.
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