164461-16-9Relevant articles and documents
A supramolecularly tunable chiral diphosphine ligand: Application to Rh and Ir-catalyzed enantioselective hydrogenation
Zhang, Xi-Chang,Hu, Yi-Hu,Chen, Chuan-Fu,Fang, Qiang,Yang, Li-Yao,Lu, Ying-Bo,Xie, Lin-Jie,Wu, Jing,Li, Shijun,Fang, Wenjun
, p. 4294 - 4299 (2016)
A supramolecularly tunable chiral bisphosphine ligand bearing two pyridyl-containing crown ethers, (-) or (+)-Xyl-P16C6-Phos, was fabricated and utilized in the Rh-catalyzed asymmetric hydrogenation of α-dehydroamino acid esters and Ir-catalyzed asymmetric hydrogenation of quinolines in high yields with excellent enantioselectivities (90-99% ee). Up to a 22% enhancement in enantioselectivity was achieved by the addition of certain amounts of alkali ions (Li+, Na+ or K+), which could be selectively recognized and effectively complexed by the crown ethers on the chiral Xyl-P16C6-Phos.
Development of robust heterogeneous chiral rhodium catalysts utilizing acid?base and electrostatic interactions for efficient continuous-flow asymmetric hydrogenations
Saito, Yuki,Kobayashi, Shu
supporting information, p. 16546 - 16551 (2020/11/09)
Heterogeneous chiral Rh catalysts based on acid?base and electrostatic interactions have been developed. The robust catalysts demonstrate high activity and selectivity in the continuous-flow asymmetric hydrogenation of a wide variety of enamides and dehyd
Axially chiral electron-rich TunePhos-type ligand: synthesis and applications in asymmetric hydrogenation
Zou, Yaping,Geng, Huiling,Zhang, Weicheng,Yu, Shichao,Zhang, Xumu
scheme or table, p. 5777 - 5779 (2009/12/26)
A new electron-rich TunePhos type ligand has been synthesized; excellent enantioselectivities (up to 99% ee) have been achieved in Rh-catalyzed asymmetric hydrogenation of α-dehydroamino acid methyl esters and dimethyl itaconate.