Assembly of indenamine derivatives through in situ formed N-sulfonyliminium ion initiated cyclization

Abstract

An expedient route to structurally diverse indenamine derivatives through condensation of the readily accessible substituted cinnamylaldehydes and sulfonylamines under the catalysis of FeCl₃ has been developed, featuring high efficiency in the generation of two bonds and one ring in a single-step and water as the only by-product.