A Regioselective Lithiation of 1-Methoxymethoxyindole at the 2-Position and Its Application for the Synthesis of 2-Substituted Indoles
摘要:
A regioselective lithiation of 1-methoxymethoxyindole at the 2-position was achieved with n-BuLi at 0-degrees-C. Subsequent treatment with electrophiles afforded 2-substituted 1-methoxymethoxyindoles, which were readily converted to 2-substituted indoles.
Catalytic Tandem and One-Pot Dehydrogenation–Alkylation and −Insertion Reactions of Saturated Hydrocarbons with Alcohols and Alkenes
作者:Junghwa Kim、Nuwan Pannilawithana、Chae S. Yi
DOI:10.1021/acscatal.6b02186
日期:2016.12.2
reaction of saturated hydrocarbon substrates with alcohols to form the alkyl-substituted alkene and arene products. The analogous one-pot dehydrogenation–insertion of saturated ketones with alkenes and dienes directly yielded synthetically useful 2-alkylphenol and benzopyran products in a highly regio- and stereoselective manner without forming any wasteful byproducts.
Intramolecular addition of benzylic radicals onto ketenimines. Synthesis of 2-alkylindoles
作者:Mateo Alajarín、Angel Vidal、María-Mar Ortín
DOI:10.1039/b310593h
日期:——
The inter- and intramolecularaddition of free radicals onto ketenimines is studied. All the attempts to add intermolecularly several silicon, oxygen or carbon centered radicals to N-(4-methylphenyl)-C,C-diphenyl ketenimine were unsuccessful. In contrast, the intramolecularaddition of benzylic radicals, generated from xanthates, onto the central carbon of a ketenimine function with its N atom linked
Rapid and General Protocol towards Catalyst-Free Friedel-Crafts C-Alkylation of Indoles in Water Assisted by Microwave Irradiation
作者:Margherita De Rosa、Annunziata Soriente
DOI:10.1002/ejoc.200901333
日期:2010.2
uncatalyzed Friedel― Crafts alkylation of indoles using microwave irradiation in water is described. A series of functionalized indole derivatives has been synthesized in very short times with moderate to good yields. The combination of microwave irradiation and superheated water offers significant advantages over conventional methods, such as higher selectivities, simplicity, shorter reaction times, and
Benzofuran and indole synthesis via Cu(<scp>i</scp>)-catalyzed coupling of N-tosylhydrazone and o-hydroxy or o-amino phenylacetylene
作者:Tiebo Xiao、Xichang Dong、Lei Zhou
DOI:10.1039/c2ob26867a
日期:——
A general and practical method to synthesize 2-substituted benzofurans and indoles is described. This method employs easily accessible N-tosylhydrazones and o-hydroxy or o-amino phenylacetylenes as substrates. The reaction proceeds through a CuBr-catalyzed coupling–allenylation–cyclization sequence under ligand-free conditions.
A facile one-pot method to synthesise 2-alkylated indole and 2,2′-bis(indolyl)methane derivatives using ketones as electrophiles and their anion sensing ability
作者:Sinan Bayindir、Nurullah Saracoglu
DOI:10.1039/c6ra16192h
日期:——
Indole derivatives are of great importance because of their biologicalactivity and application in technology. This study explores the synthesis of 2-alkylated indoles derivatives and 2,2′-bis(indolyl)methanes, and their application in anion sensing. The synthesis of a wide range of 2-alkylated indoles and some 2,2′-bis(indolyl)methanes, which cannot be synthesized by previously reported methods, was
吲哚衍生物由于其生物活性和在技术中的应用而具有重要意义。这项研究探索2-烷基化的吲哚衍生物和2,2'-双(吲哚基)甲烷的合成及其在阴离子传感中的应用。不能通过先前报道的方法合成的范围广泛的2-烷基化的吲哚和一些2,2'-双(吲哚基)甲烷的合成是首次使用吲哚环向亲电取代的偶极交换来完成的。某些吲哚衍生物表现出选择性识别和感测能力朝˚F -和HSO 4 -通过肉眼检测的颜色变化的阴离子。还使用UV-Vis光谱和1对吲哚衍生物的感测细节进行了评估1 H NMR滴定技术。