The Triplex Diels-Alder Reaction of 1,3-Dienes with Enol, Alkene, and Acetylenic Dienophiles: Scope and Utility

Article abstract of DOI:10.1021/jo00272a017

The <4 + 2> cycloaddition of an electron-rich diene to an electron-rich dienophile may be catalyzed by irradiation of a cyanoarene.This reaction is shown to proceed through an intermediate ternary excited state complex (triplex) and is therefore called th