Vicarious nucleophilic substitution using chloromethyl phenyl sulfone was applied to pyridinium and 1, 2, 3-triazinium dicyanomethylides to afford corresponding 4-substituted pyiridinium and 5-substituted triazinium dicyanomethylides, respectively. They were readily transformed to 4-phenylsulfonylmethylpyridines and 5-phenylsulfonylmethyltriazines by radical reaction.
Vicarious nucleophilic substitution of pyridinium 1-dicyanomethylides with 1-chloromethyl phenyl sulfone gave corresponding 4-substituted derivatives. The dicyanomethylene group was readily eliminated via radical reaction to afford 4-phenylsulfonylmethylpyridines.