towards phosphineoxides and phosphonates has been successfully developed through the desulfonative coupling of various sulfones with secondary phosphineoxides and phosphites. This protocol features simple experimental procedures under mild conditions (i. e., catalyst‐ and oxidant‐free, room temperature and open to air). By doing so, a variety of alkynyl, alkenyl and allyl phosphineoxides or phosphonates
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
Efficient Ni/(S,S)-Ph-BPE-catalyzed asymmetrichydrogenation of α-substituted α,β-unsaturated phosphine oxides/phosphonates/phosphoric acids has been successfully developed, and a wide range of chiral α-substituted phosphines hydrogenation products were obtained in generally high yields with excellent enantioselective control (92%–99% yields, 84%−>99% ee). This method features a cheap transition metal
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。
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.