Lewis Acid Catalyzed Diels−Alder Reactions of 1,2-Naphthoquinones
作者:Danny M. Gelman、Craig M. Forsyth、Patrick Perlmutter
DOI:10.1021/ol9021047
日期:2009.11.5
The use of BF3·OEt2 catalysis in Diels−Alder reactions of 3,4-unsubstituted 1,2-naphthoquinones provides direct access to cis-tetrahydrophenanthrene derivatives in good to excellent yields (66−99%) without rapid adduct aromatization commonly associated with corresponding thermal processes.