Syntheses de nouveaux heterocycles pyrroliques: Des thiepino[4,5-c]- et [4,5-b]pyrroles

The reaction of N-methylpryrrole-3,4-dicarboxaldehyde ) I )and N-methylpyrrole-2,3-dicarboxaldehyde ) 2 ) with sulfones affored thiepimo4,5-c]-pyrrole 6,6-dioxides and the thiepimo4,5-b]pyrrole 6,6-dioxides, respectively. Attempts to condense sulfides with 1 yielded the thiepino4,5-c]-pyrrole ring system, however sulfides with 2 resulted in benzo-annelation.