Palladium-Catalyzed Sequential Vinylic C–H Arylation/Amination of 2-Vinylanilines with Aryl boronic Acids: Access to 2-Arylindoles
作者:Ruixia Yu、Dejun Li、Fanlong Zeng
DOI:10.1021/acs.joc.7b02728
日期:2018.1.5
A palladium-catalyzed selective and successive vinylic C–H arylation/amination of 2-vinylanilines with arylboronic acids to generate indoles has been developed. This procedure represents a straightforward and practical approach to valuable multifunctionalized indoles.
Silver or cerium-promoted free radical cascade difunctionalization of <i>o</i>-vinylanilides with sodium aryl- or alkylsulfinates
作者:Jilai Wu、Yuanyuan Zong、Chunxia Zhao、Qinqin Yan、Lixian Sun、Yiming Li、Jincan Zhao、Yaxin Ge、Zejiang Li
DOI:10.1039/c8ob02964d
日期:——
oxysulfonylation of o-vinylanilides with sodium aryl- or alkylsulfinates by a free radical mechanism has been developed, which provides a mild, facile and convenient method for the synthesis of various benzoxazines. Control experiments, including gram-level reactions and mechanistic studies, are involved in the reaction system.
Bicyclic Bridgehead Phosphoramidite-Based Hybrid Diphosphorus Ligands: Design, Synthesis, and Application in Catalytic Asymmetric Hydrogenation
作者:Hong-Quan Du、Xiang-Ping Hu
DOI:10.1021/acs.orglett.1c02978
日期:2021.10.1
A strategy for chiral ligand design has been developed that allows for incorporation of an achiral bicyclic bridgehead phosphoramidite to generate a class of hybrid diphosphorus ligands for high activity and asymmetric control. Using this concept, a series of chiral phosphine–phosphoramidite ligands bearing the sole chirality at the ligand backbone have been prepared and successfully employed in the
Metal-Free Synthesis of 2-Fluoroalkylated Quinolines Using Polyfluoroalkanoic Acids as Direct Fluorine Sources
作者:Jiang Nan、Yan Hu、Pu Chen、Yangmin Ma
DOI:10.1021/acs.orglett.9b00039
日期:2019.4.5
A novel [5 + 1] cyclization of 2-vinylanilines with polyfluoroalkanoic acids under catalyst- and additive-free conditions was successfully implemented. The approach directly employs very low-cost and readily available polyfluoroalkanoic acids as both C1 synthons and fluoroalkyl building blocks. This method provides concise access to diverse 2-fluoroalkylated (CF3, C2F5, C3F7, CF2H, CF2Cl, and CF2Br)
在无催化剂和无添加剂的条件下,成功地实现了多氟链烷酸对2-乙烯基苯胺的新型[5 +1]环化反应。该方法直接采用成本非常低廉且易于获得的多氟链烷酸作为C1合成子和氟代烷基构件。该方法可以简便地获得高收率的多种2-氟烷基化(CF 3,C 2 F 5,C 3 F 7,CF 2 H,CF 2 Cl和CF 2 Br)喹啉,并具有优异的官能团耐受性,且收率高。克秤。
Palladium-Catalyzed Coupling of Sulfonylhydrazones with Heteroaromatic 2-Amino-Halides (Barluenga Reaction): Exploring the Electronics of the Sulfonylhydrazone
作者:Hongyu Tan、Ioannis Houpis、Renmao Liu、Youchu Wang、Zhilong Chen、Matthew J. Fleming
DOI:10.1021/acs.oprd.5b00211
日期:2015.8.21
paper describes a new reactivity of the Pd-catalyzed coupling of 2-amino-3-bromo-aromatic and heteroaromatic compounds with sulfonylhydrazones (Barluenga reaction).The new catalyst system and modulation of the electronic nature of hydrazone that were needed for successful reaction are described herein.