Aminocatalyzed Cascade Synthesis of Enantioenriched 1,7-Annulated Indoles from Indole-7-Carbaldehyde Derivatives and α,β-Unsaturated Aldehydes

Article abstract of DOI:10.1002/adsc.201500629

We report herein a new cascade strategy for the enantioselective synthesis of 1,7-annulated indoles based on iminium-enamine activation. A careful study of the indole substitution pattern revealed that a chloro substituent at the C-3 position was importan