Integration of multiple active sites on large-pore mesoporous silica for enantioselective tandem reactions
作者:Xuelin Xia、Jingjing Meng、Hanxin Wu、Tanyu Cheng、Guohua Liu
DOI:10.1039/c6cc09008g
日期:——
Facile construction of a multifunctional heterogeneous catalyst through assembly of Au/carbene and chiral ruthenium/diamine dual complexes in a large-pore mesoporous silica is developed. It enables an efficient one-pot hydration-asymmetric transfer...
One-Pot Cascade Hydration-Asymmetric Transfer Hydrogenation as a Practical Strategy to Construct Chiral β-Adrenergic Receptor Blockers
作者:Qunqun Ye、Tanyu Cheng、Yuxi Zhao、Junwei Zhao、Ronghua Jin、Guohua Liu
DOI:10.1002/cctc.201500409
日期:2015.6.15
the Au‐catalyzed hydration of aryl‐substituted haloalkynes to aryl‐substituted α‐halomethyl ketones and the Ru‐catalyzed asymmetrictransferhydrogenation of aryl‐substituted α‐halomethyl ketones to aryl‐substituted 2‐haloethanols. The significant benefits of this procedure are that it provides chiral aromatic halohydrins in high yields, with excellent enantioselectivities, and a wide variety of functional
A practical method for the asymmetric transferhydrogenation of α‐substituted ketones was developed utilizing oxo‐tethered N‐sulfonyldiamine‐ruthenium complexes. Reduction by HCO2H and HCO2K in a mixed solvent of EtOAc/H2O allowed for the selective synthesis of halohydrins from 2‐bromoacetophenone (98%) and 2‐chloroacetophenone (>99%), leading to suppressed undesired side reactions stemming from formylation