Optisch aktive 3-Amino-2 H -azirine al Bausteinefürenantiomerenreineαα-disubstituierteα-Aminosäuren:在Trichotoxin-A-50-Segment中合成von Isovalin-Synthonen和Einbau †
Dynamic Double Kinetic Resolution of Amines and Alcohols under the Cocatalysis of Raney Nickel/<i>Candida antarctica</i>Lipase B: From Concept to Application
作者:Bo Xia、Guilin Cheng、Xianfu Lin、Qi Wu
DOI:10.1002/ejoc.201400042
日期:2014.5
Herein, we have established a dynamic double kineticresolution (DDKR) strategy under the co-catalysis of Raney nickel and Candidaantarcticalipase B (CAL-B) for the one-pot simultaneous resolution of primary amines and secondary alcohols (or esters). The DDKR strategy was successfully applied to the resolution of a series of racemic amines and secondary alcohols (or esters) as well as mexiletine, an
在此,我们建立了在雷尼镍和南极念珠菌脂肪酶 B (CAL-B) 共催化下的动态双动力学拆分 (DDKR) 策略,用于一锅同时拆分伯胺和仲醇(或酯)。DDKR 策略已成功应用于一系列外消旋胺和仲醇(或酯)以及美西律(一种重要的抗心律失常药)的拆分。催化剂可以重复使用多次,并具有相同的高活性。放大实验也很成功。作为比传统的简单动力学拆分更原子经济和更有效的方法,DDKR 策略可广泛用于制备光学纯的胺和醇。
Self-disproportionation of enantiomers of non-racemic chiral amine derivatives through achiral chromatography
作者:Tsuyoshi Nakamura、Kaori Tateishi、Shiori Tsukagoshi、Saori Hashimoto、Shotaro Watanabe、Vadim A. Soloshonok、José Luis Aceña、Osamu Kitagawa
DOI:10.1016/j.tet.2012.03.054
日期:2012.5
Efficient self-disproportionation of enantiomers of several non-racemic chiral amines was achieved through conversion to N-acetamides and subsequent MPLC using an achiral column. The MPLC of these non-racemic N-acetamide derivatives gave the chart having a clear boundary between two fractions. Thus, in the less polar fraction, remarkable enantiomerenrichment was observed (>99%ee), while the ee of
Derivatives of 6,7-dihydro-5H-imidazo[1,2-a]imidazole-3-carboxylic acid amide exhibit good inhibitory effect upon the interaction of CAMs and Leukointegrins and are thus useful in the treatment of inflammatory disease.
Compounds are provided which have the structure
Wherein A, B, C, D, m, Y, Ra, Rc, Rd, and Rd′ are as described herein, and which are useful as inhibitors of tryptase, thrombin, trypsin, Factor Xa, Factor VIIa, Factor XIa, and urokinase-type plasminogen activator and may be employed in preventing and/or treating asthma, chronic asthma, allergic rhinitis, and thrombotic disorders.