Modular 1,1′-Ferrocenediyl-cored <i>P</i>
-Stereogenic Diphosphines: ′′JDayPhos′′ Series and its Use in Rhodium(I)-Catalyzed Hydrogenation
作者:Gašper Poklukar、Michel Stephan、Barbara Mohar
DOI:10.1002/adsc.201800255
日期:2018.7.4
A novel ferrocene‐based P‐stereogenic diphospine ligand series dubbed JDayPhos was developed, which rhodium(I) complexes of some of its members exhibited excellent enantioselectivity (up to >99% ee) and high activity in asymmetric hydrogenation of β‐unsubstituted or ‐substituted itaconates and α‐methylene‐γ‐oxo‐carboxylates.
Heavyweight “R-SMS-Phos” Ligands in the Olefins’ Hydrogenation Arena
作者:Borut Zupančič、Barbara Mohar、Michel Stephan
DOI:10.1021/ol100184p
日期:2010.3.19
A series of enantiopure P-stereogenic 1,2-bis[(o-RO-phenyl)(phenyl)phosphino]ethane (R-SMS-Phos) ligands wherein R= i-Pr, i-Bu, t-Bu, 3-Pen, and CH2TMS was assessed in the Rh(I)-catalyzed hydrogenation of an indicative set of olefins. The best performing t-Bu-SMS-Phos ligand was screened against a wide range of representative classes of standard and new olefinic substrates such as dehydroamido esters
一系列对映纯的P-立体异构1,2-双[(o -RO-苯基)(苯基)膦基]乙烷(R-SMS-Phos)配体,其中R = i -Pr,i -Bu,t -Bu,3 -苯和CH 2 TMS是在Rh(I)催化的一组指示性烯烃的氢化反应中评估的。表现最佳吨-Bu-SMS-PHOS配体筛选对宽范围的代表类标准和新的烯烃底材如dehydroamido酯,脱氢α酰氨基膦酸酯,烯酰胺,衣康酸酯,丙烯酸酯,乙烯醇的,α-苯甲酸磷新戊酯,α-(2-吡啶基N-氧化物)苯乙烯和α-(1-羟亚氨基乙基)苯乙烯。在温和的条件下可获得出色的对映选择性和高TOF。
AXIALLY ASYMMETRIC PHOSPHORUS COMPOUND AND PRODUCTION METHOD THEREOF
申请人:TANAKA Ken
公开号:US20110218345A1
公开(公告)日:2011-09-08
[Problem to be Solved] To provide an axially asymmetric optically active biarylphosphorus compound that can easily produced without the step of optical resolution which was almost indispensable in conventional methods.
[Means for Solving the Problems] A method for producing an axially asymmetric phosphorus compound represented by the general formula (1), comprising a cycloaddition reaction of a compound having a triple bond with the use of a catalyst containing rhodium metal and an optically active bisphosphine.
(In the formula (1), R
1
and R
2
may be the same or different and independently are an alkyl group optionally having a substituent group, a cycloalkyl group optionally having a substituent group, an aryl group optionally having a substituent group, an alkoxy group optionally having a substituent group or an aryloxy group optionally having a substituent group; * is axial asymmetry.)