Stereoisomeric Styryl-substituted Pyrrolidines, 3,7-Diazobicyclo[3.3.0]octanes and 2-Styrylpyrroles from Cinnamaldehyde Iminium-N-methanide 1,3-Dipoles

Abstract

The reaction of cinnamaldehyde N-aryliminium methanide 1,3-dipoles with dimethyl maleate, dimethyl fumarate and some N-arylmaleimides gives equal mixtures of stereoisomeric substituted pyrrolidines and a route to 2-styrylpyrroles with dimethyl acetylenedicarboxylate.

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