Eosin Y photoredox catalyzed net redox neutral reaction for regiospecific annulation to 3-sulfonylindoles <i>via</i> anion oxidation of sodium sulfinate salts
作者:Rajendra S. Rohokale、Shrikant D. Tambe、Umesh A. Kshirsagar
DOI:10.1039/c7ob02977b
日期:——
with 2-alkynyl-azidoarenes was developed with visible light as a mediator. The reaction offers metal and oxidant/reductant free, visible light mediated vicinal sulfonamination of alkynes to 2-aryl/alkyl-3-sulfonylindoles and proceeds via the generation of a sulfur-centered radical through direct oxidation of the sulfinate anion by an excited photocatalyst with a reductive quenching cycle. The mild conditions
<i>tert</i>-Butyl Hydroperoxide (TBHP)-Initiated Vicinal Sulfonamination of Alkynes: A Radical Annulation toward 3-Sulfonylindoles
作者:Fei Chen、Qiang Meng、Shang-Qing Han、Bing Han
DOI:10.1021/acs.orglett.6b01427
日期:2016.7.15
novel, efficient, and facile vicinal sulfonamination of alkynes by the reaction of accessible 2-alkynyl arylazides with sulfinic acids in the presence of tert-butylhydroperoxide (TBHP) has been developed. This protocol utilizes sulfinic acids as the sulfonating reagent, azidos as the aminating reagent, and TBHP as the sulfonyl radical initiator. By using this protocol, a variety of potentially bioactive
One-pot C–C, C–N, and C–S bond construction for synthesis of 3-sulfenylindoles directly from unactivated anilines involving dual palladium catalysis and mechanistic insights from DFT
作者:Sumit K. Rastogi、Richa Singh、Santosh Kumar、Abhishek Kumar Mishra、Mini Bharati Ahirwar、Milind M. Deshmukh、Arun K. Sinha、Ravindra Kumar
DOI:10.1039/d2ob01606k
日期:——
An efficient dual Pd-catalytic system was developed for one-pot synthesis of 3-sulfenylindoles via C–C, C–N and C–S bond construction directly from unactivated 2-iodo(NH)anilines under mild reaction conditions. Furthermore, 3-selenyl/halo/carbon-functionalized indoles were synthesized in good yields and a short reaction time. The synthetic utility of 3-sulfenylindole was also demonstrated. The key
Rh<sub>2</sub>(II)-Catalyzed Nitro-Group Migration Reactions: Selective Synthesis of 3-Nitroindoles from β-Nitro Styryl Azides
作者:Benjamin J. Stokes、Sheng Liu、Tom G. Driver
DOI:10.1021/ja111060q
日期:2011.4.6
Rhodium carboxylate complexes (1 mol %) catalyze the migration of electron-withdrawing groups to selectively produce 3-substituted indoles from beta-substituted styryl azides. The relative order of migratorial aptitude for this transformation is ester << amide < H < sulfonyl < benzoyl << nitro.
ZnO-mediated regioselective C-arylsulfonylation of indoles: a facile solvent-free synthesis of 2- and 3-sulfonylindoles and preliminary evaluation of their activity against drug-resistant mutant HIV-1 reverse transcriptases (RTs)
A ZnO-mediated one-pot solvent-free protocol for the regioselective C-arylsulfonylation of indoles is described and some novel derivatives were tested on wild type and non-nucleoside inhibitor resistant K103N and Y181C HIV-1 reverse transcriptases (RTs). (C) 2013 Elsevier Ltd. All rights reserved.