Expedient Synthesis of Highly Substituted Pyrroles via Tandem Rearrangement of α-Diazo Oxime Ethers

Abstract

An efficient rhodium-catalyzed synthesis of 2<i>H</i>-azirines and pyrroles has been developed. Novel rearrangement of α-oximino ketenes derived from α-diazo oxime ethers provides 2<i>H</i>-azirines bearing quaternary centers and allows for subsequent rearrangement to highly substituted pyrroles in excellent yields