Catalytic Enantioselective Diels−Alder Reactions of 1,4-Quinone Monoketals
作者:Matthias Breuning、E. J. Corey
DOI:10.1021/ol015852y
日期:2001.5.1
Achiral 1,4-quinone monoketals function well as dienophiles in enantioselectiveDiels−Alderreactions catalyzed by a chiral Ti(IV) Lewis acid.
在由手性 Ti(IV) Lewis 酸催化的对映选择性 Diels-Alder 反应中,非手性 1,4-醌单缩酮的作用很好。
Synthesis of quinone monoketals by diol exchange
作者:Michael C. Pirrung、David S. Nunn
DOI:10.1016/s0040-4039(00)60993-0
日期:1992.10
A new procedure for the synthesis of quinone monoketals derived from a variety of diols has been developed involving treatment of the readily available dimethyl ketals with diols and BF3.etherate in DME.
Highly Enantioselective Catalytic Conjugate Additions to Cyclohexadienones
作者:Rosalinde Imbos、Mirjan H. G. Brilman、Mauro Pineschi、Ben L. Feringa
DOI:10.1021/ol990707u
日期:1999.8.1
Enantioselective copper phosphoramidite-catalyzed conjugate addition of dialkylzinc reagents (R2Zn) to several 4,4-disubstituted cyctohexadienones was achieved with dr's up to 99/1 and ee's up to 99%.