Nickel-Catalyzed Enantioconvergent Reductive Hydroalkylation of Olefins with α-Heteroatom Phosphorus or Sulfur Alkyl Electrophiles
作者:Shi-Jiang He、Jia-Wang Wang、Yan Li、Zhe-Yuan Xu、Xiao-Xu Wang、Xi Lu、Yao Fu
DOI:10.1021/jacs.9b09415
日期:2020.1.8
bond formation reactions have been made in recent years through the use of transition-metal-catalyzed cross-couplingreactions of racemic secondary alkyl electrophiles with organometallic reagents. Herein, we report a general process for the asymmetric construction of alkyl-alkyl bonds adjacent to heteroatoms, namely, a nickel-catalyzed enantioconvergent reductive hydroalkylation of olefins with α-heteroatom
On the configurational stability of lithiated phosphine oxides
作者:Peter O'Brien、Stuart Warren
DOI:10.1016/0040-4039(95)01743-2
日期:1995.11
Two methods have been used to determine whether lithiatedphosphineoxides arc configurationally stable in THF at −78 °C: from both, we conclude that lithiatedphosphineoxides are not configurationally stable even on the timescale of reaction with internal electrophiles (eg Me3SiCl).
Nickel‐Catalyzed Asymmetric Hydrogenation of α‐Substituted Vinylphosphonates and Diarylvinylphosphine Oxides
作者:Hanlin Wei、Hao Chen、Jianzhong Chen、Ilya D. Gridnev、Wanbin Zhang
DOI:10.1002/anie.202214990
日期:2023.2
The first efficient Ni-catalyzed asymmetric hydrogenation of terminal olefins using H2 was developed, affording chiral ethylphosphine products with up to 99 % yield, 96 % ee and 1000 S/C (substrate/catalyst). The calculation and experimental mechanism study indicate that the two added hydrogen atoms of the product originate from H2 and the reaction proceeds through a NiII rather than Ni0 cyclic process
开发了第一个使用 H 2对末端烯烃进行有效的镍催化不对称氢化反应,提供了高达 99% 收率、96% ee 和 1000 S/C(底物/催化剂)的手性乙基膦产物。计算和实验机理研究表明,产物中加入的两个氢原子来源于H 2,反应通过Ni II而不是Ni 0循环过程进行。