Copper-Catalyzed Double C–S Bonds Formation via Different Paths: Synthesis of Benzothiazoles from N-Benzyl-2-iodoaniline and Potassium Sulfide
摘要:
A new, highly efficient procedure for the synthesis of benzothiazoles from easily available N-benzyl-2-iodoaniline and potassium sulfide has been developed. The results show copper-catalyzed double C-S bond formation via a traditional cross-coupling reaction and an oxidative cross-coupling reaction.
Assembly of 3-Acyloxindoles via CuI/<scp>l</scp>-Proline-Catalyzed Intramolecular Arylation of β-Keto Amides
作者:Biao Lu、Dawei Ma
DOI:10.1021/ol0625886
日期:2006.12.1
[Structure: see text] Intramolecular coupling of beta-keto 2-iodoanilides catalyzed by CuI/L-proline in DMSO occurs at room temperature, affording substituted 3-acyloxindoles in good yield. Electroniceffects on the aromatic ring have little influence on this reaction. Variations at the 1, 3, 4, 5, and 6 positions of the oxindoles were achieved by employing the corresponding amides.
[结构:见正文] CuI / L-脯氨酸在DMSO中催化的β-酮2-碘代苯胺分子内偶联在室温下进行,提供了高收率的取代3-酰基新多烯。芳环上的电子效应对该反应几乎没有影响。通过使用相应的酰胺,可以在羟吲哚的1、3、4、5和6位发生变化。
Electrochemical C−H/N−H Functionalization for the Synthesis of Highly Functionalized (Aza)indoles
their prevalence in nature and their broad utility in pharmaceutical industry. Reported herein is an unprecedented noble‐metal‐ and oxidant‐free electrochemical method for the coupling of (hetero)arylamines with tethered alkynes to synthesize highly functionalized indoles, as well as the more challenging azaindoles.
Stereoselective Synthesis of Methylene Oxindoles via Palladium(II)-Catalyzed Intramolecular Cross-Coupling of Carbamoyl Chlorides
作者:Christine M. Le、Theresa Sperger、Rui Fu、Xiao Hou、Yong Hwan Lim、Franziska Schoenebeck、Mark Lautens
DOI:10.1021/jacs.6b08925
日期:2016.11.2
We report a highly robust, general and stereoselective method for the synthesis of 3-(chloromethylene)oxindoles from alkyne-tethered carbamoyl chlorides using PdCl2(PhCN)2 as the catalyst. The transformation involves a stereo- and regioselective chloropalladation of an internal alkyne to generate a nucleophilic vinyl PdII species, which then undergoes an intramolecular cross-coupling with a carbamoyl
Palladium(0)-Catalyzed Single and Double Isonitrile Insertion: A Facile Synthesis of Benzofurans, Indoles, and Isatins
作者:Gopal Chandru Senadi、Wan-Ping Hu、Siva Senthil Kumar Boominathan、Jeh-Jeng Wang
DOI:10.1002/chem.201405933
日期:2015.1.12
A palladium(0)‐catalyzed cascade process consisting of isonitrileinsertion and α‐Csp3H cross‐coupling can be achieved for the synthesis of benzofurans and indoles. The construction of isatins by a Pd‐catalyzed cascade reaction incorporating double isonitrileinsertion, amination, and hydrolysis has also been achieved. The key features of this work include diverse heterocycle synthesis, phosphine‐ligand‐free
One-pot strategy of copper-catalyzed synthesis of 1,2-disubstituted benzimidazoles
作者:Caixia Xie、Xushuang Han、Jian Gong、Danyang Li、Chen Ma
DOI:10.1039/c7ob00945c
日期:——
A simple, one-pot and copper-catalyzed coupling reaction for the construction of 1,2-disubstituted benzimidazole derivatives is described. Low-cost copper salt and weak base K3PO4 were utlized in this reaction. A variety of 1,2-disubstituted benzimidazoles were obtained in moderate to excellent yields.