Mechanistic Dichotomy with Alkynes in the Formal Hydrohydrazination/Fischer Indolization Tandem Reaction Catalyzed by a Ph3PAuNTf2/pTSA Binary System
作者:Nitin T. Patil、Ashok Konala
DOI:10.1002/ejoc.201001114
日期:2010.12
method involving a formalhydrohydrazination/ Fischerindolizationtandemreaction to synthesize 2,3-disubstituted indoles from alkynes and arylhydrazines has been developed. The approach uses a Ph 3 PAuNTf 2 /pTSA·H 2O binary catalytic system in which a very low catalyst loading of Ph 3 PAuNTf 2 (2 mol-%) is required. The reaction time is very short and, most importantly, the reaction is not sensitive
Asymmetric Fluorinative Dearomatization of Tryptophol Derivatives by Chiral Anion Phase-Transfer Catalysis
作者:Xiao-Wei Liang、Yue Cai、Shu-Li You
DOI:10.1002/cjoc.201800319
日期:2018.10
An asymmetric fluorinative dearomatization reaction of tryptophol derivatives was developed via chiral anion phase‐transfer catalysis. Various fluorinated furoindolines were obtained in moderate to excellent yields and enantioselectivity in the presence of Selectfluor. The preliminary mechanistic studies suggested the existence of an in situ formed tryptophol boronic ester plays a critical role in
Copper(I)-Catalyzed Cascade Dearomatization of 2-Substituted Tryptophols with Arylidonium Salts
作者:Chuan Liu、Wei Zhang、Li-Xin Dai、Shu-Li You
DOI:10.1021/ol301939w
日期:2012.9.7
Copper(I)-catalyzed dearomative arylation and vinylation of 2-substitutedtryptophols were realized with a subsequent cyclization reaction. The cascadedearomatization sequence provided versatile furoindoline derivatives with two quaternary carbon centers in good to excellent yields.
Oxidative Indole Dearomatization for Asymmetric Furoindoline Synthesis by a Flavin‐Dependent Monooxygenase Involved in the Biosynthesis of Bicyclic Thiopeptide Thiostrepton
作者:Zhi Lin、Yufeng Xue、Xiao‐Wei Liang、Jian Wang、Shuangjun Lin、Jiang Tao、Shu‐Li You、Wen Liu
DOI:10.1002/anie.202013174
日期:2021.4.6
subsequent epoxide opening in a highly enantioselective manner during the conversion of 2‐methyl‐indole‐3‐acetic acid or 2‐methyl‐tryptophol to furoindoline, with up to >99 % conversion and >99 % ee under mild reaction conditions. Complementing current chemical methods for oxidative indole dearomatization, the TsrE activity‐based approach enriches the toolbox in the asymmetricsynthesis of products