A Short Asymmetric Synthesis of (+)-Lyoniresinol Dimethyl Ether
作者:Tokouré Assoumatine、Probal K. Datta、Timothy S. Hooper、Brigitte L. Yvon、James L. Charlton
DOI:10.1021/jo0497454
日期:2004.6.1
A short, efficient synthesis of the lignan (+)-lyoniresinol dimethyl ether is described. The synthesis is achieved by asymmetric photocyclization of an achiral dibenzylidenesuccinate to a chiral aryldihydronaphthalene. (−)-Ephedrine is used as a chiral auxiliary to bias the atropisomeric equilibrium in the dibenzylidenesuccinate prior to the photochemical reaction. The synthesis of the title compound