Enantioselective hydrogen atom transfer to α-sulfonyl radicals controlled by selective coordination of a chiral Lewis acid to an enantiotopic sulfonyl oxygen
作者:Hideki Sugimoto、Shuichi Nakamura、Yoshihiko Watanabe、Takeshi Toru
DOI:10.1016/s0957-4166(03)00531-7
日期:2003.10
Enantioselective hydrogen atom transfer to a-sulfonyl radicals generated from the alkyl radical addition to 2-propenyl and 1-phenylethenyl sulfones in the presence of chiral Lewis acids affords products with high enantioselectivity. The stereochemical course is discussed with the transition states involving selective coordination of a chiral Lewis acid to an enantiotopic sulfonyl oxygen. (C) 2003 Elsevier Ltd. All rights reserved.