Asymmetric Diels-Alder: Monobenzylated isosorbide and isomannide as highly effective chiral auxiliaries
作者:André Loupy、Daphné Monteux
DOI:10.1016/0040-4039(96)01539-0
日期:1996.9
Lewis acid promoted Diels-Alder reactions of acrylate esters from monobenzylated isosorbide or isomannide and cyclopentadiene provided exclusively endo-adducts with good yields and high diastereoselectivities. The selectivities are quasi total and opposed using either isosorbide or isomannide derivatives.
路易斯酸促进了由单苄基化异山梨醇或异甘露糖醇与环戊二烯形成的丙烯酸酯的Diels-Alder反应,专门提供了具有高收率和高非对映选择性的内加合物。的选择性是准总和使用任一异山梨醇或异二缩甘露醇衍生物反对。