87586-96-7Relevant articles and documents
Efficient, rhodium-catalyzed hydrogenation of α-dehydroamino acid esters with chiral monodentate aminophosphanes bearing two binaphthyl groups
Eberhardt, Luc,Armspach, Dominique,Matt, Dominique,Toupet, Loic,Oswald, Benoit
, p. 5395 - 5403 (2007)
All four stereoisomers of 4-{4,5-dihydro-3H-dinaphtho-[2,1-c:1′, 2′-e]azepin-4-yl)dinaphtho[2,1-d:1′,2′-f[1,3,2] dioxaphosphepine have been prepared from (R or S)-1,1′-binaphthyl-2, 2′-diyl chlorophosphite and the appropriate dinaphtho-azepine. When react
Asymmetric Reduction of Aromatic α-Dehydroamino Acid Esters with Water as Hydrogen Source
Dai, Yuze,Chen, Jingchao,Wang, Zheting,Wang, Ting,Wang, Lin,Yang, Yong,Qiao, Xingfang,Fan, Baomin
supporting information, p. 7141 - 7147 (2021/05/29)
The asymmetric reduction of aromatic α-dehydroamino acid esters with water as the hydrogen source was developed by a Rh/Cu co-catalytic system. The reaction tolerates various functional groups, providing a valuable synthetic tool to access chiral α-amino acid esters readily. Moreover, the present methodology also was applied in the cost-effective and easy to handle preparation of chiral deuterated α-amino esters by using D2O.
Diaza-Crown Ether-Bridged Chiral Diphosphoramidite Ligands: Synthesis and Applications in Asymmetric Catalysis
Luo, Yier,Ouyang, Guanghui,Tang, Yuping,He, Yan-Mei,Fan, Qing-Hua
supporting information, p. 8176 - 8184 (2020/07/15)
A small library of diaza-crown ether-bridged chiral diphosphoramidite ligands was prepared. In the rhodium-catalyzed asymmetric hydrogenation and hydroformylation reactions, these ligands exhibited distinct properties in catalytic activity and/or enantioselectivity. Hydrogenated products with opposite absolute configurations could be obtained in high yields with excellent ee values by utilizing (S,S)-L1 and (S,S)-L3, respectively. Meanwhile, the addition of alkali metal cations caused variations in catalytic outcomes, showing the supramolecular tunability of these Rh/diphosphoramidite catalytic systems.
An Atropos Chiral Biphenyl Bisphosphine Ligand Bearing Only 2,2′-Substituents and Its Application in Rh-Catalyzed Asymmetric Hydrogenation
Jia, Jia,Ling, Zheng,Zhang, Zhenfeng,Tamura, Ken,Gridnev, Ilya D.,Imamoto, Tsuneo,Zhang, Wanbin
, p. 738 - 743 (2017/12/26)
An atropos chiral biphenyl bisphosphine ligand bearing only 2,2′-substituents was rationally designed and easily synthesized utilizing a bulky chiral t-butylmethylphosphino block. Computational results showed a large difference in the free energies betwee
