Asymmetric transfer hydrogenation of ketones catalyzed by nickel complex with new PNO-type ligands
作者:Zhen Rong Dong、Yan Yun Li、Shen Luan Yu、Guo Song Sun、Jing Xing Gao
DOI:10.1016/j.cclet.2012.02.005
日期:2012.5
The new polydentate mixed-N, P, O chiral ligands have been synthesized by the condensation of bis(o-formylphenyl)-phenylphosphane and R-phenylglycinol in CHCl3, and fully characterized by IR, NMR and EIMS spectra. These ligands were employed with a simple Ni complex Ni(PPhs)2Cl2in situ as catalytic systems for asymmetric transfer hydrogenation of ketones, and the corresponding optical alcohols were
通过双(邻-甲酰基苯基)-苯基膦和R-苯基甘醇在CHCl 3中的缩合反应合成了新的多齿混合的N,P,O手性配体,并通过IR,NMR和EIMS光谱进行了全面表征。这些配位体与简单的Ni络合物Ni(PPh s)2 Cl 2一起就地用作酮的不对称转移氢化的催化体系,并在温和条件下获得了最高84%ee的相应光学醇。