Chiral‐Organotin‐Catalyzed Kinetic Resolution of Vicinal Amino Alcohols
作者:Hui Yang、Wen‐Hua Zheng
DOI:10.1002/anie.201909700
日期:2019.11.4
A highlyefficientkineticresolution of racemic amino alcohols has been achieved for the first time with a chiral tin catalyst. A chiral organotin compound with 3,4,5-trifluorophenyl groups at the 3,3'-positions of the binaphthyl framework enabled this transformation with excellent yield and highenantioselectivity. The process tolerates aryl- and alkyl-substituted amino alcohols and a variety of
Optically active quarternary ammonium salt with axial chirality, method for producing thereof, and application thereof for asymmetric synthesis of &agr;-amino acid
申请人:Nagase & Co., Ltd.
公开号:US06340753B1
公开(公告)日:2002-01-22
A novel optically active quarternary ammonium salt with an axial chirality is provided. The quarternary ammonium salt can act as a phase-transfer catalyst to convert glycine derivatives into optically active &agr;-amino acid derivatives by stereoselectively alkylating the glycine derivatives. Furthermore, according to the present invention, intermediates useful for producing the novel quarternary ammonium can be produced.
Cationic porous organic polymers as an excellent platform for highly efficient removal of pollutants from water
作者:Xiaochen Shen、Si Ma、Hong Xia、Zhan Shi、Ying Mu、Xiaoming Liu
DOI:10.1039/c8ta09145e
日期:——
construction of efficient adsorption materials for the removal of pollutants from water is of primary importance for environmental protection. Here, we present a novel cationic porousorganicpolymer C-NSANaphHCP@Br, that features a permanent porosity with a high surface area and moderate pore volume, and exhibits excellent chemical stability. More importantly, the new cationic network was found to be
构建有效的吸附材料以去除水中的污染物对于环境保护至关重要。在这里,我们介绍了一种新型的阳离子多孔有机聚合物C-NSA Naph HCP @ Br,它具有高孔隙率和中等孔体积的永久孔隙率,并具有出色的化学稳定性。更重要的是,发现新的阳离子网络是从水中脱除阴离子有机染料和Cr 2 O 7 2-的极好平台,具有快速的吸附速率,出色的选择性和高效率以及良好的可回收性。
Molecular Design of a <i>C</i><sub>2</sub>-Symmetric Chiral Phase-Transfer Catalyst for Practical Asymmetric Synthesis of <i>α</i>-Amino Acids