Tf2NH-Catalyzed Amide Synthesis from Vinyl Azides and Alcohols
摘要:
Triflimide (Tf2NH) specifically catalyzed reactions of alcohols and vinyl azides, enabling efficient construction of amides with C-C bond formation through nucleophilic attack of vinyl azides onto the putative carbocation intermediates derived from alcohols are described.
Diastereo- and Enantioselective Construction of a Bispirooxindole Scaffold Containing a Tetrahydro-β-carboline Moiety through an Organocatalytic Asymmetric Cascade Reaction
作者:Wei Dai、Han Lu、Xin Li、Feng Shi、Shu-Jiang Tu
DOI:10.1002/chem.201402485
日期:2014.9.1
The first catalytic asymmetric construction of a new class of bispirooxindole scaffold‐containing tetrahydro‐β‐carboline moiety has been established through chiral phosphoric acid‐catalyzed three‐component cascade Michael/Pictet–Spengler reactions of isatin‐derived 3‐indolylmethanols, isatins, and amino‐ester, which afforded structurally complex and diverse bispirooxindoles with one quaternary and
An efficient and practical method for synthesis of C2‐phosphorylated indoles has been disclosed via a metal‐free 1,2‐phosphorylation of 3‐indolylmethanols with H‐phosphine oxides or H‐phosphonates. This alternative protocol features a broad substrate scope with respect to both 3‐indolylmethanols derived from isatins, acyclic α‐keto amide, α‐keto ester, 1,2‐diketone and simple ketones and H‐phosphine
Organocatalytic enantioselective and (Z)-selective allylation of 3-indolylmethanol via hydrogen-bond activation
作者:Yan Liu、Hong-Hao Zhang、Yu-Chen Zhang、Yan Jiang、Feng Shi、Shu-Jiang Tu
DOI:10.1039/c4cc02056a
日期:——
asymmetric allylation of 3-indolylmethanol has been established via hydrogen-bond activating mode, which directly assembles isatin-derived 3-indolylmethanols and o-hydroxystyrenes into chiral allyl-substituted oxindoles with one all-carbon quaternarystereogeniccenter and one newly formed C=Cbond in excellent enantioselectivity and (Z)-selectivity (up to 97% ee, >20 : 1 Z/E ratio). This transformation provides
已通过氢键活化模式建立了3-吲哚甲醇的有机催化不对称烯丙基化反应,该方法直接将由靛红衍生的3-吲哚甲醇和邻羟基苯乙烯组装成具有一个全碳季立体中心和一个新形成的C的手性烯丙基取代的羟吲哚。 = C键具有出色的对映选择性和(Z)选择性(高达97%ee,> 20:1 Z / E比)。这种转化为吲哚的不对称C3官能化和3-吲哚基甲醇的烯丙基化提供了一个有效的策略,并且可以精确控制CC和C = C键形成中的立体选择性。
Design and Catalytic Asymmetric Construction of Axially Chiral 3,3′‐Bisindole Skeletons
作者:Chun Ma、Fei Jiang、Feng‐Tao Sheng、Yinchun Jiao、Guang‐Jian Mei、Feng Shi
DOI:10.1002/anie.201811177
日期:2019.3.4
The firstcatalyticasymmetric construction of 3,3′‐bisindole skeletons bearing both axial and central chirality has been established by organocatalyticasymmetric addition reactions of 2‐substituted 3,3′‐bisindoles with 3‐indolylmethanols (up to 98 % yield, all >95:5 d.r., >99 % ee). This reaction also represents the first highly enantioselective construction of axially chiral 3,3′‐bisindole skeletons