Regio- and diastereoselective tandem addition–carbocyclization promoted by sulfanyl radicals on chiral perhydro-1,3-benzoxazines
摘要:
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.
Regio- and diastereoselective tandem addition–carbocyclization promoted by sulfanyl radicals on chiral perhydro-1,3-benzoxazines
摘要:
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.