Chiral Rhodium Complexes Derived From Electron-Rich Phosphine-Phosphites as Asymmetric Hydrogenation Catalysts
作者:Pablo Etayo、José L. Núñez-Rico、Anton Vidal-Ferran
DOI:10.1021/om200933b
日期:2011.12.26
Two new chiral cationic rhodium(I) complexes derived from electron-rich dicyclohexylphosphine-phosphite ligands were prepared from enantiopure Sharpless epoxy ethers. The best-performing catalyst system, which bears a less bulky methyl ether moiety, exhibited remarkably high enantioselectivity (up to 99% ee) and reactivity (up to >2500 TON) in asymmetric hydrogenation reactions of various functionalized
Mechanistically Guided One Pot Synthesis of Phosphine‐Phosphite and Its Implication in Asymmetric Hydrogenation
作者:Anirban Sen、Rohit Kumar、Swechchha Pandey、K. Vipin Raj、Pawan Kumar、Kumar Vanka、Samir H. Chikkali
DOI:10.1002/ejoc.202101447
日期:2022.1.17
Synthesis of hybrid phosphorus ligands is a multistep, time-consuming exercise. This limitation has been addressed by meticulous understanding of the process of formation of hybrid ligands and a onepotsynthesis of a phosphine-phosphite ligand (L1) is reported for the first time. L1 coordinates to Rh and catalyzes asymmetric hydrogenation of 15 substrates with a high TOF of 2289 and enantiomeric excess
PHARMACOLOGICAL AGENTS FOR TREATING OCULAR DISEASES
申请人:CALASIA PHARMACEUTICALS, INC.
公开号:US20210154213A1
公开(公告)日:2021-05-27
Methods of treating presbyopia or cataract in a subject in need thereof are provided. The methods require administering to the subject an effective amount of a composition comprising a compound that inhibits the formation of high molecular weight aggregates of human α-A-crystallin. Compositions containing certain compounds are believed to be also effective in the treatment of transthyretin (TTR)-associated amyloidosis and Parkinson's disease.