Camphordisulfonamides: good chiral ligands for the addition of dialkylzinc to aliphatic aldehydes
作者:Oscar Prieto、Diego J Ramón、Miguel Yus
DOI:10.1016/s0957-4166(00)00100-2
日期:2000.4
preparation of several disulfonamides derived from camphor and their use in the titanium tetraisopropoxide-promoted enantioselective addition of dialkylzinc to aldehydes is described. The enantiomeric ratio is up to 98:2, the best results being obtained for aliphatic aldehydes.
描述了几种由樟脑衍生的二磺酰胺的制备及其在四异丙氧基钛促进的二烷基锌对醛的对映选择性加成中的用途。对映体比例高达98:2,对于脂族醛而言,可获得最佳结果。