A new procedure for the synthesis of aryl- or hetaryl-substituted conjugated diynes

Article abstract of DOI:10.1007/BF00697082

On treatment with two equivalents of NaNH2 in liquid ammonia the enyne sulfides RC<*>C-CH=CHSEt (cis-isomers, where R is an aryl or a hetaryl) affords sodium salts of 1,3-diynes.The latter react with ethyl bromide to produce disubstituted diynes RC<*>C-C<