Regioselective Cobalt-Catalyzed Diels-Alder Reaction towards 1,3-Disubstituted and 1,2,3-Trisubstituted Benzene Derivatives
作者:Gerhard Hilt、Michael Danz
DOI:10.1055/s-2008-1078450
日期:2008.7
A straightforward reaction sequence consisting of the Wittig olefination of aldehydes utilizing allyltriphenylphosphonium bromide for the generation of 1-substituted 1,3-dienes, cobalt-catalyzed neutral Diels-Alderreaction with terminal and internal alkynes, and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) oxidation of the dihydroaromatic intermediates leads to regiochemically enriched biphenyl