title: Trimethylaluminum-triflimide complexes for the catalysis of highly hindered Diels-Alder reactions.
abstract: Two catalysts, Me(2)AlNTf(2) and MeAl(NTf(2))(2), derived from the mixing of trimethylaluminum with triflimide, proved to be highly effective catalysts in hindered Diels-Alder reactions, generating the desired Diels-Alder cycloadducts from both hindered 2-silyloxydienes and hindered dienophiles. Thus reaction of 1 with 2 afforded the hindered cycloadduct 4 in excellent yield in 0.5-1.5 h at -40 °C.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA. jung@chem.ucla.edu
authors.forename: Michael E
authors.initials: ME
authors.lastname: Jung
authors.forename: Mikhail
authors.initials: M
authors.lastname: Guzaev