Further rearrangement of meisenheimer products of allyl aryl amine oxides

摘要

Thyagarajan and co-workers have studied the olec- ular reorganization of arylpropynyl sulfoxides and aryl- propynylamine oxides. It has been proposed that the [2s,3s] sigmatropic shift is followed by a [3s,3s] shift, enolization, ketol formation, etc., to give a five-membered ring in benzo[b]thiophenes and indoles in almost quan- titative yields.