Tandem Michael addition/isocyanide insertion into the C–C bond: a novel access to 2-acylpyrroles and medium-ring fused pyrroles
作者:Lingjuan Zhang、Xianxiu Xu、Qiu-rong Shao、Ling Pan、Qun Liu
DOI:10.1039/c3ob41793j
日期:——
A new reaction model, tandem Michael addition/formal isocyanide insertion into the acyl C–C bond, has been developed. Thus, a series of 2-acylpyrroles and seven-/eight-membered ring fusedpyrroles were synthesized from the reaction of methyl isocyanides with enones in a single operation.
domino process from Morita-Baylis-Hillman carbonates of isatins and acrylate and [small alpha]-cyano-[small alpha],[small beta]-unsaturated ketones to deliver highly enantioenriched tetrahydrofuro[2',3':4,5]pyrano[2,3-b]indoles was disclosed catalysed by cinchona-derived tertiary amines, involving [small alpha]-regioselective cyclopropanation, ring-opening,...