Regio- and diastereoselective tandem addition–carbocyclization promoted by sulfanyl radicals on chiral perhydro-1,3-benzoxazines
作者:Rafael Pedrosa、Celia Andrés、Juan P. Duque-Soladana、Alicia Maestro、Javier Nieto
DOI:10.1016/j.tetasy.2003.06.003
日期:2003.10
Radical addition-carbocyclization of 2-allyl-3-acyloyl-substituted perhydro-1,3-benzoxazines readily provides 3,4-disubstituted pyrrolidinone derivatives with total regioselectivity and good diastereoselectivity. The key step of the reaction is a tandem addition-5-exo-cyclization promoted by a sulfanyl radical. (C) 2003 Elsevier Ltd. All rights reserved.