Stereoselective cross aldol condensation of bicyclo[3.2.0]alkanones
作者:Laurence Miesch、Tania Welsch、Michel Miesch
DOI:10.1039/c3ob40431e
日期:——
reaction between [(S)-(−)] or [(R)-(+)]-benzyloxypropanal and silyl enol ethers derived from bicyclo[3.2.0]alkanones was carried out in the presence of TiCl4, leading with total stereoselectivity to a 1 : 1 mixture of enantiomerically pure diastereomers isolated in 81% overall yield. Thus, 5 stereogenic centers could be created starting from one. Furthermore, an efficientaccess to an enantiomerically