Various P∗-chiral phosphite-type ligands: their synthesis, stereochemistry and use in Pd-catalysed allylation
作者:Eduard B. Benetsky、Sergey V. Zheglov、Tatiana B. Grishina、Fliur Z. Macaev、Liudmila P. Bet、Vadim A. Davankov、Konstantin N. Gavrilov
DOI:10.1016/j.tetlet.2007.09.125
日期:2007.11
available modular phosphite, phosphoramidite and diamidophosphite ligands with P∗-stereocentres have been prepared from inexpensive optically active precursors. Using these novel ligands, up to 91% ee was achieved in Pd-catalysed asymmetric allylic amination. The catalytic performance is affected greatly by the structure of the phosphocentre of the ligand.
由廉价的光学活性前体制备了一个新的易于获得的,具有P *-立体中心的模块化亚磷酸酯,亚磷酰胺和亚酰胺基亚磷酸酯配体。使用这些新颖的配体,在Pd催化的不对称烯丙基胺化反应中可实现高达91%的ee。配体的磷中心的结构极大地影响了催化性能。