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.
Microwave-assisted selenium dioxide mediated selective oxidation of 1-tetralones to 1,2-naphthoquinones
作者:Danny M. Gelman、Patrick Perlmutter
DOI:10.1016/j.tetlet.2008.10.068
日期:2009.1
We report an improved procedure for the selective transformation of substituted 1-tetralones to 1,2-naphthoquinones by microwave-assisted selenium dioxide oxidation. The reaction time is effectively reduced from hours to seconds without any loss of yield (40–70%) or selectivity.