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。
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.