成功开发了Ni/( S , S )-Ph-BPE催化的α-取代α,β-不饱和膦氧化物/膦酸酯/磷酸的高效不对称加氢反应,并获得了多种手性α-取代膦加氢产物获得普遍高产率和出色的对映选择性控制(92%–99% 产率,84%−>99% ee)。该方法具有廉价的过渡金属镍催化体系、高官能团耐受性、广泛的底物范围通用性和优异的对映选择性。根据氘标记实验的结果,为这种不对称氢化提出了一个似是而非的催化循环。
Manganese(<scp>i</scp>)-catalyzed access to 1,2-bisphosphine ligands
作者:Luo Ge、Syuzanna R. Harutyunyan
DOI:10.1039/d1sc06694c
日期:——
we present the first catalyticasymmetric hydrophosphination of α,β-unsaturated phosphine oxides in the presence of a chiralcomplex of earth-abundant manganese(I). This catalytic system offers a short two-step, one-pot synthetic sequence to easily accessible and structurally tunable chiral 1,2-bisphosphines in high yields and enantiomeric excess. The resulting bidentate phosphine ligands were successfully
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。
A Highly Regioselective Palladium-Catalyzed Hydrophosphination of Alkynes Using a Diphosphine−Hydrosilane Binary System
A novel transition-metal-catalyzed hydrophosphination of terminal alkynes using a diphosphine-hydrosilane binary system takes place regioselectively to provide vinylic phosphines, which undergo air oxidation during workup, affording the corresponding vinylphosphine oxides in good yields. In this hydrophosphination, hydrosilanes act as a useful hydrogen source, and furthermore, small amounts of oxygen is required to accomplish the reaction efficiently.
Cheruku, Pradeep; Paptchikhine, Alexander; Church, Tamara L., Journal of the American Chemical Society, 2009, vol. 131, p. 8285 - 8289
作者:Cheruku, Pradeep、Paptchikhine, Alexander、Church, Tamara L.、Andersson, Pher G.