Asymmetric Diels-Alder reaction catalysed by some chiral Lewis acids
作者:F. Rebiere、O. Riant、H.B. Kagan
DOI:10.1016/0957-4166(90)90014-2
日期:1990.1
Diels-Alderreaction between cyclopentadiene and various dienophiles (mainly methacrolein) at −78°C was catalysed by various chiral aluminum alcoholates. The catalysts were prepared by reaction of EtAlCl2 with several families of diol (or their monoether monoalcohol derivatives). The most enantioselective catalyst is derived from diol 5a. A detailed investigation in that case gives some light on the
Building Blocks for the Preparation of Enantiomerically Pure Drugs Containing a Phenylalkylamine Moiety. Synthesebausteine zur Herstellung enantiomerenreiner Arzneistoffe mit Phenylalkylamin-Partialstruktur
作者:Franz Bracher、Thomas Litz
DOI:10.1002/ardp.19943270907
日期:——
The enantiomers of chiral drugs may exhibit distinctly different pharmacokinetic and pharmacodynamic properties. Thus, the application of pure enantiomers is desirable in most cases. Therefore, it is necessary to know which enantiomer is the more advantageous one and to work out an economical large scale synthesis of this pure enantiomer. Biocatalytic transformations of prochiral compounds provide
Manganese/Enzyme Sequential Catalytic Pathway for the Production of Optically Active γ-Functionalized Alcohols
作者:Meng Deng、Jiaqi Yang、Zhiyi Kong、Yaning Li、Quanpeng Wang、Huan Liu、Shu-Zhen Deng、Nan Li
DOI:10.1021/acs.joc.4c00776
日期:2024.6.21
the production of opticallyactive γ-functionalized alcohols from relevant alkenes has been developed by using a robust Mn(III)/air/(Me2SiH)2O catalytic system combined with lipase-catalyzedkineticresolution. This approach demonstrates exceptional tolerance toward proximal functional groups present on alkenes, enabling the achievement of high yields and exclusive enantioselectivity. Under this sequential
通过使用稳健的 Mn(III)/空气/(Me 2 SiH) 2 O 催化系统与脂肪酶催化动力学拆分相结合,开发了一种简单实用的催化工艺,用于从相关烯烃生产光学活性 γ-官能化醇。该方法表现出对烯烃上存在的近端官能团的优异耐受性,从而实现高产率和独特的对映选择性。在这种顺序催化系统下,手性烯烃前体也可以转化为γ-官能化醇和相关的乙酸酯作为可分离的单一对映体。
Walborsky, Harry M.; Murari, Martha Pass, Canadian Journal of Chemistry, 1984, vol. 62, p. 2464 - 2470