Reduction with zinc has been found to be an effective method for selective synthesis of (1R,2R)-diarylethylenediamines from the corresponding chiral aromatic diimines through their intramolecularcoupling.
We herein report a general, practical, and highly efficient method for asymmetricsynthesis of a wide range of chiral vicinal diamines via reductive coupling of imines templated by chiral diboron. The protocol features high enantioselectivity and stereospecificity, mild reaction conditions, simple operating procedures, use of readily available starting materials, and a broad substrate scope. The method
[EN] CHIRAL GUANIDINES, SALTS THEREOF, METHODS OF MAKING CHIRAL GUANIDINES AND SALTS THEREOF, AND USES OF CHIRAL GUANIDINES AND SALTS THEREOF IN THE PREPARATION OF ENANTIOMERICALLY PURE AMINO ACIDS<br/>[FR] GUANIDINES CHIRALES, SELS DE CELLES-CI, PROCÉDÉS DE FABRICATION DE GUANIDINES CHIRALES ET DE LEURS SELS, ET UTILISATIONS DE GUANIDINES CHIRALES ET DE LEURS SELS DANS LA PRÉPARATION D'ACIDES AMINÉS ÉNANTIOMÉRIQUEMENT PURS
申请人:FU RUI
公开号:WO2021081677A1
公开(公告)日:2021-05-06
Provided are compounds and salts having a structure of Formula (I) or (II): (I), and (II) wherein: both of the chiral carbon atoms denoted by "*" are both in the R configuration or both in the S configuration. Compounds and salts of Formulae (I) and (II) are useful in the preparation of enantiomerically pure amino acids. Conversion of amino acids to D-form from any of L-form, racemate or other enantiomerically impure mixtures or conversion of amino acids to L-form from any of D-form, racemate or other enantiomerically impure mixtures is disclosed.
A dual-catalysis approach to the kinetic resolution of 1,2-diaryl-1,2-diaminoethanes
作者:Chang Min、Nisha Mittal、Chandra Kanta De、Daniel Seidel
DOI:10.1039/c2cc36361e
日期:——
The kinetic resolution of racemic C2-symmetric 1,2-diaryl-1,2-diaminoethanes was accomplished for the first time through application of a dual-catalysis approach.
首次通过应用双催化方法实现了外消旋C2-对称1,2-二芳基-1,2-二氨基乙烷的动力学拆分。
[EN] DIBORON GLYCOL ESTER, PREPARATION METHOD THEREFOR, INTERMEDIATE THEREOF, AND APPLICATION THEREOF<br/>[FR] ESTER DE GLYCOL DIBORÉ, SON PROCÉDÉ DE PRÉPARATION, INTERMÉDIAIRE CORRESPONDANT ET UTILISATION ASSOCIÉE<br/>[ZH] 一种联硼酸二醇酯、其制备方法、其中间体及其应用
申请人:SHANGHAI INSITITUTE OF ORGANIC CHEMISTRY CHINESE ACAD OF SCIENCES