作者:Nicholas C. Payne、Douglas W. Stephan
DOI:10.1016/s0022-328x(00)89057-9
日期:1981.12
of an excess of the racemic modification of the monodentate ligand, varying degrees of stereoselective binding to the metal complex containing the chiral chelate ligand were observed. A partial resolution of several chiral monophosphines was thus achieved in situ, monitored by 31P NMR and optical rotary dispersion spectra. The configuration of the preferentially bound enantiomer was investigated using
式[Pt(PP)CH 3(P ★)] ClO 4的非对映体Pt配合物,其中PP是双(二苯基膦基)乙烷或手性双齿膦,是2 S -3 S-双((二苯基膦基)丁烷中的一种, +)- 2-3- O-异亚丙基-2,3-二羟基-1,4-双(二苯基膦基)丁烷,SN,N-双(二苯基膦基)-1-苯基乙胺和SN,N-双((二苯基膦基)丙氨酸乙酯,P ★为式PC 6 H 5的手性单齿膦R'R'',已经准备好了。在单齿配体的外消旋修饰过量的情况下,观察到与包含手性螯合配体的金属配合物的立体选择性结合程度不同。因此,通过31 P NMR和旋光色散光谱监测到了几种手性单膦酸酯的部分拆分。使用单晶X射线技术研究了优先结合的对映异构体的构型,并通过旋光色散光谱进行了鉴定。讨论了影响对映选择性程度和性质的因素。