Sequence‐Dependent Stereodivergent Allylic Alkylation/Fluorination of Acyclic Ketones
作者:Xi‐Jia Liu、Shicheng Jin、Wen‐Yun Zhang、Qiang‐Qiang Liu、Chao Zheng、Shu‐Li You
DOI:10.1002/anie.201912882
日期:2020.1.27
The stereodivergent iridium-catalyzed allylicalkylation and fluorination of acyclicketones is described. α-Pyridyl-α-fluoroketones with vicinal tertiary and quaternary stereocenters were obtained in moderate to excellent yields and stereoselectivities. Distinct from known stereodivergent synthesis, for which two different chiral catalysts are required in general, herein we report a sequence-dependent
Regio- and Enantioselective Synthesis of<i>N</i>-Allylindoles by Iridium-Catalyzed Allylic Amination/Transition-Metal-Catalyzed Cyclization Reactions
作者:Ke-Yin Ye、Li-Xin Dai、Shu-Li You
DOI:10.1002/chem.201400026
日期:2014.3.10
Regio‐ and enantioselectivesynthesis of N‐allylindoles was realized through an iridium‐catalyzed asymmetric allylicaminationreaction with 2‐alkynylanilines and subsequent transition‐metal‐catalyzed cyclizationreactions. The highly enantioenriched allylic amines prepared from Ir‐catalysis were treated with catalytic amount of NaAuCl4⋅2 H2O or PdCl2 providing various substituted N‐allylindoles in
Asymmetric<i>N</i>-Allylation of Indoles Through the Iridium-Catalyzed Allylic Alkylation/Oxidation of Indolines
作者:Wen-Bo Liu、Xiao Zhang、Li-Xin Dai、Shu-Li You
DOI:10.1002/anie.201200649
日期:2012.5.21
N‐allylindoles by a one‐pot Ir‐catalyzed asymmetric allylicalkylation/oxidation reaction of indolines has been realized. The current method features high regioselectivity and enantioselectivity together with a broad range of indoles with varying electronic properties. The utility of this method was demonstrated by the synthesis of dihydropyrrolo[1,2‐a]indole derivatives.
有两个步骤可能比一个步骤更好:通过一锅Ir催化的二氢吲哚的不对称烯丙基烷基化/氧化反应,可以有效地合成对映体富集的N-烯丙基。目前的方法具有很高的区域选择性和对映选择性,以及范围广泛的具有不同电子特性的吲哚。通过合成二氢吡咯并[1,2- a ]吲哚衍生物证明了该方法的实用性。
One pot iridium-catalyzed asymmetrical double allylations of sodium sulfide: a fast and economic way to construct chiral C2-symmetric bis(1-substituted-allyl)sulfane
One pot asymmetrical double allylations of sodium sulfide catalyzed by an iridium complex along with a combination of caesium fluoride and water in dichloromethane have been realized and the double allylation products with two C–S bond chiral centers were obtained in 67–99% yields with b/l 81/19–99/1, dr 85/15–99/1, and 96–99% ee.
作者:Quan Cai、Xiao-Wei Liang、Shou-Guo Wang、Jun-Wei Zhang、Xiao Zhang、Shu-Li You
DOI:10.1021/ol302215u
日期:2012.10.5
with Hoveyda–Grubbs II catalyst enabling highly efficient synthesis of enantioenriched tetrahydro-β-carbolines (up to 98% yield, 99% ee) through a ring-closing metathesis/isomerization/Pictet–Spengler cascade reaction via sequentialcatalysis.