Norsteroids. III. Preparation of B-Norcholestane Derivatives by an Ester Condensation of a 5,6-seco-Cholestane Keto Ester<sup>1</sup>
作者:HAROLD R. NACE、ERNEST CAPSTACK
DOI:10.1021/jo01070a058
日期:1961.12
Epoxidation and Baeyer–Villiger oxidation of γ-hydroxy-αβ-unsaturated ketones on exposure to m-chloroperbenzoic acid
作者:Marioara Mendelovici、Erwin Glotter
DOI:10.1039/p19920001735
日期:——
of 6β-and 6α-hydroxy-(acetoxy-)cholest-4-en-3-one with MCPBA gives two types of product, depending on the initial site of the peroxy acid attack. Attack at the carbonyl group gives a Baeyer–Villiger rearrangement leading first to enol lactones and then by epoxidation of the latter to epoxy lactones. Alternatively, attack at the double bond gives epoxy ketones which can subsequently undergo a Baeyer–Villiger