Organocatalytic Asymmetric Addition of Thiols to Trifluoromethylaldimine: An Efficient Approach to Chiral Trifluoromethylated<i>N</i>,<i>S</i>-Acetals
作者:Xin Fang、Qing-Hua Li、Hai-Yan Tao、Chun-Jiang Wang
DOI:10.1002/adsc.201200845
日期:2013.1.16
The first organocatalyticasymmetric addition of thiols to trifluoromethylaldimine for the construction of chiral trifluoromethylated N,S-acetals has been achieved in high yields (up to 99%) and excellent enantioselectivities (up to 95% ee) with 1 mol% of a bifunctional organocatalyst.
Asymmetric construction of fluorinated imidazolidines via Cu(i)-catalyzed exo′-selective 1,3-dipolar cycloaddition of azomethine ylides with fluorinated imines
作者:Qing-Hua Li、Liang Wei、Xuan Chen、Chun-Jiang Wang
DOI:10.1039/c3cc43025a
日期:——
Expedient access to optically active fluorinated 2,4-trans-imidazolidines was successfully developed via Cu(I)-catalyzed exo'-selective 1,3-DC of azomethine ylides with fluorinated imines.
Copper(I)-Catalyzed Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylides with Fluorinated Imines: The Expanded Scope and Mechanism Insights
作者:Liang Wei、Qing-Hua Li、Chun-Jiang Wang
DOI:10.1021/acs.joc.8b01743
日期:2018.10.5
The mechanism of the Cu(I)/(S,Rp)-PPFOMe-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with fluorinated aldimines has been studied using labeling experiments, control experiments, and linear effect experiments, which clearly ruled out the 1,3-DC/epimerization pathways and explained the unusal exo′-selective stereochemistry. This protocol allows for the preparation of a series of highly functionalized
使用标记实验,对照实验和线性效应实验研究了Cu(I)/(S,R p)-PPFOMe催化的1,3-偶极环偶氮亚甲基与氟化亚胺的加成反应的机理,明确排除了1,3- DC /差向异构化途径和解释了此项特殊的外切' -选择性的立体化学。该方案允许以良好的产率和优异的立体选择性制备一系列高度官能化的氟化咪唑烷。而且,目前的方法已经成功地扩展到通过内含物合成具有挑战性的,带有CF 3的季立构中心的咪唑烷类化合物。在相同的反应条件下,用三氟化酮亚胺对甲亚胺烷基化物进行1,3-DC选择性合成。
Axially chiral phosphine–oxazoline ligands in the silver(I)-catalyzed asymmetric Mannich reaction of fluorinated aldimines with trimethylsiloxyfuran
作者:Qian-Yi Zhao、Zhi-Liang Yuan、Min Shi
DOI:10.1016/j.tetasy.2010.05.025
日期:2010.4
Axiallychiralphosphine–oxazolineligand L7, prepared from (S)-binol, was found to be a fairly effective chiralligand in the silver(I)-catalyzed asymmetricMannichreaction of fluorinated aldimines with trimethylsiloxyfuran to give the corresponding adducts in up to 99% yield, over 20:1 dr and 81% ee.
Synthesis of 2-Trifluoromethyl Quinoline by the Reaction of Fluorinated Imine with Alkyne Catalyzed by Indium(III) Triflate
作者:Yongming Wu、Haibo Xie、Jiangtao Zhu、Zixian Chen、Shan Li
DOI:10.1055/s-0030-1258770
日期:2010.10
Preparation of 2-trifluoromethyl-4-aryl quinolines from a variety of readily available alkynes and N-aryl trifluoroethylimine has been achieved via indium(III) triflate catalyzed Diels―Alder reactions.