C3-Arylation of indoles with aryl ketones <i>via</i> C–C/C–H activations
作者:Zi-Qiong Guo、Hui Xu、Xing Wang、Zhen-Yu Wang、Biao Ma、Hui-Xiong Dai
DOI:10.1039/d1cc03954g
日期:——
C3-Arylation of indoles with aryl ketones is accomplished via palladium-catalyzed ligand-promoted Ar–C(O) cleavage and subsequent C–H arylation of indole. Various (hetero)aryl ketones are compatible in this reaction, affording the corresponding 3-arylindoles in moderate to good yields. Further introduction of an indole moiety into the natural products desoxyestrone and evodiamine demonstrate the synthetic
Ascorbic Acid as an Aryl Radical Inducer in the Gold‐Mediated Arylation of Indoles with Aryldiazonium Chlorides
作者:Ignacio Medina‐Mercado、Eric Omar Asomoza‐Solís、Eduardo Martínez‐González、Victor Manuel Ugalde‐Saldívar、Lydia Gabriela Ledesma‐Olvera、José Enrique Barquera‐Lozada、Virginia Gómez‐Vidales、Joaquín Barroso‐Flores、Bernardo A. Frontana‐Uribe、Susana Porcel
DOI:10.1002/chem.201904413
日期:2020.1.13
the development of protocols that facilitate the oxidative addition of gold to access mild cross-coupling processes mediated by this metal has increased. In this context, we report herein that ascorbicacid, a natural and readily accessible antioxidant, can be used to accelerate the oxidative addition of aryldiazoniumchlorides onto AuI . The aryl-AuIII species generated in this way, has been used
Metal-free, C–H arylation of indole and its derivatives with aryl diazonium salts by visible-light photoredox catalysis
作者:Ying-Peng Zhang、Xiao-Long Feng、Yun-Shang Yang、Bi-Xia Cao
DOI:10.1016/j.tetlet.2016.04.051
日期:2016.5
In this Letter, we present the Rhodamine B catalyzed direct C–Harylation of indole with aryl diazonium salts. This method only requires green light and roomtemperature.
Electronic effect of substituents on anilines favors 1,4-addition to<i>trans</i>-β-nitrostyrenes: access to<i>N</i>-substituted 3-arylindoles and 3-arylindoles
作者:Radhakrishna Gattu、Suchandra Bhattacharjee、Karuna Mahato、Abu T. Khan
DOI:10.1039/c8ob00736e
日期:——
A simple and an efficient method for the regioselectivesynthesis of N-alkyl/aryl/H 3-arylindole derivatives from N-substituted anilines and trans-β-nitrostyrenes has been described using 10 mol% of bismuth(III) triflate as a catalyst in acetonitrile at 80 °C. The present protocol profits from the formation of new C–C and C–N bonds, broad substrate scope and moderate to good yields.
已经描述了一种简单有效的方法,该方法使用10 mol%的三氟甲磺酸铋(III)作为催化剂,由N-取代的苯胺和反式-β-硝基苯乙烯区域选择性合成N-烷基/芳基/ H 3-芳基吲哚衍生物。乙腈在80°C下进行。本协议受益于新的C–C和C–N键的形成,广泛的底物范围以及中等至良好的收益率。
Tandem Meinwald Rearrangement-Fischer
Indolisation: A One-Pot Conversion of Epoxides into Indoles
作者:Richard Taylor、James Donald
DOI:10.1055/s-0028-1087476
日期:——
A tandem Sc(OTf)3-mediated Meinwald epoxide rearrangement-Fischer indole synthesis is reported. Optimisation and scope and limitation studies are described. In addition, preliminary investigations to develop a telescoped epoxidation-Meinwald rearrangement-Fischer indole sequence are outlined.