Regioselective Cobalt-Catalyzed Diels-Alder Reaction towards 1,3-Disubstituted and 1,2,3-Trisubstituted Benzene Derivatives
Gerhard Hilt*, Michael Danz
*Fachbereich Chemie, Philipps-Universität Marburg,
Hans-Meerwein Straße, 35043 Marburg, Germany, Email: Hiltchemie.uni.marburg.de
G. Hilt, M. Danz, Synthesis, 2008, 2257-2263.
DOI: 10.1055/s-2008-1078450
Abstract
A cobalt-catalyzed neutral Diels-Alder reaction of dienes derived from aldehydes with terminal and internal alkynes, and DDQ oxidation of the dihydroaromatic intermediates leads to regiochemically enriched biphenyl, terphenyl, and silyl-functionalized benzene derivatives in good to excellent yields.
see article for more examples
Alkynylboronic Esters as Efficient Dienophiles in Cobalt-Catalyzed Diels-Alder Reactions
G. Hilt, K. I. Smolko, Angew. Chem. Int. Ed., 2003, 42, 2795-2797.
Key Words
Diels-Alder Reaction, Cyclization, Biaryls, DDQ
ID: J66-Y2008-1930