Synthesis of 5H-pyrrolo[1,2-c]imidazoles by intramolecular wittig reaction
The intermediate phosphorus ylides which were prepared by reaction between triphenylphosphine and imidazole-4-carbaldehyde in the presence of acetylenic diesters produce dialkyl 5H-pyrrolo[1,2-c]imidazole-5,6-dicarboxylate derivatives via intramolecular Wittig reaction.