Heterocyclic sulfones. Part IV. A novel synthesis of pyrrole and fused heterocyclic sulfones

The applicability and synthetic potency of the novel reagents diethyl 2-ary l-3-(phenylsulfonyl)propene-1,1-dicarboxylate 3 are reported. Compounds 3 a re shown to be key precursors in heterocyclic sulfones syntheses. Chemical and spectroscopic evidence for the structure of the newly synthesized compo unds are described.