The First Broad Application of Alkynyl Sulfides as Dienophiles in Cobalt(I)-Catalyzed Diels−Alder Reactions
作者:Gerhard Hilt、Steffen Lüers、Klaus Harms
DOI:10.1021/jo0302915
日期:2004.2.1
The cobalt(I)-catalyzed Diels−Alder reaction of nonactivated aryl alkynyl sulfides with acyclic 1,3-dienes generates dihydroaromatic vinyl sulfides under very mild reaction conditions, and these products can be oxidized with mild oxidants to the corresponding diaryl sulfides in good overall yields. The steric and electronic effects of substituents on the aryl, as well as on the alkynyl, moieties of