Effects of Methyl Substituents on the Activity and Enantioselectivity of Homobenzotetramisole-Based Catalysts in the Kinetic Resolution of Alcohols
作者:Yuhua Zhang、Vladimir B. Birman
DOI:10.1002/adsc.200900383
日期:2009.10
Substitution of the tetrahydropyrimidine ring in enantioselective acyl transfer catalyst homobenzotetramisole (HBTM) 6 with methyl groups exerts a dramatic influence on its performance in the kineticresolution of secondary alcohols. Syn-3-Methyl analogue of HBTM (9a) has proved to be superior to the parent compound in terms of catalytic activity, enantioselectivity, and synthetic accessibility.
1-Amido-1-phenyl-3-piperidinylbutanes – CCR5 antagonists for the treatment of HIV: Part 2
作者:Christopher G. Barber、David C. Blakemore、Jean-Yves Chiva、Rachel L. Eastwood、Donald S. Middleton、Kerry A. Paradowski
DOI:10.1016/j.bmcl.2009.01.008
日期:2009.3
Optimisation of a series of 4-piperidinyltriazoles led to the identification of compound 28a which showed good whole cell antiviral activity, excellent selectivity over the hERG ion channel and complete oral absorption. (C) 2009 Elsevier Ltd. All rights reserved.
Enantioselective Synthesis of <i>syn</i>- and <i>anti</i>-1,3-Aminoalcohols via β-Aminoketones and Subsequent Reduction/Dynamic Kinetic Asymmetric Transformation
作者:Renaud Millet、Annika M. Träff、Michiel L. Petrus、Jan-E. Bäckvall
DOI:10.1021/ja107857v
日期:2010.11.3
from imines in an organocatalytic Mannich reaction were transformed to enantio- and diastereomerically pure 1,3-aminoalcohols with two stereogenic centers via a combined reduction/dynamickineticasymmetrictransformation. Both syn and anti diastereomers were obtained in high yield, dr, and ee.
在有机催化曼尼希反应中从亚胺获得的 β-氨基酮通过还原/动态动力学不对称转化的组合转化为具有两个立体中心的对映和非对映异构纯 1,3-氨基醇。顺式和反式非对映异构体均以高产率、dr 和 ee 获得。
Rearrangement of 1-Phenylbutane-1,3-diamines via an Azetidinium Cation Intermediate
Treatment of 4-amino-4-phenyl-butan-2-ol with mesyl chloride, followed by displacement with amine nucleophiles resulted in a 1,3 rearrangementvia an azetidinium cation intermediate. This rearrangement has been proven to proceed via a double inversion of stereocentres at positions 1 and 3.