New Methodology for the Conversion of Epoxides to Alkenes
作者:Feng-Ling Wu、Benjamin P. Ross、Ross P. McGeary
DOI:10.1002/ejoc.200901264
日期:2010.4
Epoxides have been transformed in good yields to alkenes by a process involving (i) ring-opening of the epoxide with 2-mercaptobenzothiazole, (ii) oxidation of the derived s-hydroxy thioethers to the corresponding sulfones, and (iii) thermal or base-promoted fragmentation of these sulfones to alkenes. The stereochemistry of the starting epoxide is transfer-red faithfully to the alkene product, because
Regio- and Chemoselective Double Allylic Substitution of Alkenyl vic-Diols
作者:Bocheng Chen、Lucas Pagès、Raphaël Dollet、Cyrille Kouklovsky、Sébastien Prévost、Aurélien de la Torre
DOI:10.1021/acs.orglett.4c00495
日期:2024.3.29
Double allylicsubstitution is an attractive approach to building molecular complexity from simple starting materials by creating two new bonds in one pot. However, this type of reaction has been doomed by chemoselectivity and regioselectivity issues. In this letter, we describe a new approach to introduce a-la-carte two new C–C, C–N, C–O, or C–S bonds in a chemo- and regioselective fashion. The reaction