Unsaturated Aldehydes as Alkene Equivalents in the Diels–Alder Reaction
作者:Esben Taarning、Robert Madsen
DOI:10.1002/chem.200800003
日期:2008.6.20
A one-pot procedure is described for using alpha,beta-unsaturated aldehydes as olefin equivalents in the Diels-Alder reaction. The method combines the normal electron demand cycloaddition with aldehyde dienophiles and the rhodium-catalyzed decarbonylation of aldehydes to afford cyclohexenes with no electron-withdrawing substituents. In this way, the aldehyde group serves as a traceless control element