Redox isomerization via azomethine ylide intermediates: N-alkyl indoles from indolines and aldehydes

Article abstract of DOI:10.1021/ol1031359

Indolines react with aromatic and heteroaromatic aldehydes to yield N-alkyl indoles in a benzoic acid catalyzed redox isomerization reaction. Azomethine ylides are intermediates in this process which was established by intramolecular [3 + 2] trapping expe