Substituent Effects on Regioselective Intramolecular Oxidation of Unactivated C−H Bonds: Stereoselective Synthesis of Substituted Tetrahydropyrans
作者:Man-Kin Wong、Nga-Wai Chung、Lan He、Dan Yang
DOI:10.1021/ja028357l
日期:2003.1.1
Our previously reported intramolecular delta-selective C-H bond oxidation by dioxiranes, generated in situ from activated ketones, offers a novel approach to the synthesis of tetrahydropyrans. To synthesize substituted tetrahydropyrans in a stereoselective manner, we examined the effects of alkyl, nitrogen, and oxygen substituents at the alpha-, beta-, and gamma-sites of ketones on the stereoselectivities