Highly Selective Palladium-Catalyzed Synthesis of Protected α,β-Unsaturated Methyl Ketones and 2-Alkoxy-1,3-butadienes. High-Speed Chemistry by Microwave Flash Heating
作者:Karl S. A. Vallin、Mats Larhed、Katarina Johansson、Anders Hallberg
DOI:10.1021/jo000070o
日期:2000.7.1
is described for the direct synthesis of 2-alkene-2-methyl-1,3-dioxolanes via regiocontrolled Heck vinylation of commercially available 2-hydroxyethyl vinylether. The procedure permits chemoselective transformation of a vinylictriflate or bromide into a blocked alpha,beta-unsaturated methyl ketone. Furthermore, a significantly improved and highly regioselective synthesis of 2-alkoxy-1,3-butadienes