New chiral o-hydroxyphenyl diazaphospholidine oxide. Catalytic application in asymmetric addition of diethylzinc to aromatic aldehydes
作者:Jean-Michel Brunel、Thierry Constantieux、Olivier Legrand、Gérard Buono
DOI:10.1016/s0040-4039(98)00388-8
日期:1998.5
Synthesis of diastereomerically pure o-hydroxyphenyl diazaphospholidine oxide 2 was achieved from a chiral diamine derived from (S)-proline. This new compound has been tested as catalyst in the asymmetric addition of diethylzinc to aromatic aldehydes. Corresponding sec-alcohols were obtained in high yields (up to 90%) with enantiomeric excesses varying from 15 to >99%. The influence of the solvent
由衍生自(S)-脯氨酸的手性二胺合成了非对映异构纯的邻-羟基苯基二氮杂磷腈氧化物2。该新化合物已在将二乙基锌不对称加成到芳族醛中作为催化剂进行了测试。以高收率(高达90%)获得相应的仲醇,对映体过量从15%至> 99%不等。研究了溶剂的影响以及醛的性质与对映选择性之间存在的重要关系。