An efficient and simple thiourea-mediated regioselective synthesis of symmetrical and unsymmetrical diversified thioethers is reported. The regioselective reaction avoids byproduct formation and offers simplified methodology, wider applicability, and easy workability and an environmentally friendly approach toward symmetrical and unsymmetrical thioethers. The mechanism of formation of thiols and symmetrical and unsymmetrical thioethers involving a sulfur surrogate is described. © 2014 American Chemical Society.

Krishnakumar K

Department of Multimedia

School of Design

Vellore Campus

Nawaz Khan F

Department of Chemistry

School of Advanced Sciences

Manivel P

Prabakaran K

Nawaz Khan F.-R

Maiyalagan T.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Industrial & Engineering Chemistry Research

Tetrahydroacridine-1,8-(2H,5H,9H,10H)-diones 4 from 1,3-cyclohexanedione and/or dimedone 1,2-chloro-3-formylquinoline 2 and anilines 3 in water at 90 °C were obtained by domino reaction approach.

RSC Advances

Water mediated reactions: TiO2 and ZnO nanoparticle catalyzed multi component domino reaction in the synthesis of tetrahydroacridinediones, acridindiones, xanthenones and xanthenes

Intramolecular C–N bond formation is achieved through oxidative cyclization of 1-(3-arylisoquinolin-1-yl)-2-(arylmethylene)hydrazines, 3, in the presence of hypervalent iodine oxidant and dichloromethane at ambient temperature.

Organoiodine(iii) mediated intramolecular oxidative cyclization of 1-(3-arylisoquinolin-1-yl)-2-(arylmethylene)hydrazines to 5-aryl-3-(aryl)-[1,2,4]triazolo[3,4-a] isoquinolines

An efficient method involving copper-free Pd(OAc)2/Ruphos-catalyzed Sonogashira coupling strategy for a variety of 3-alkynyl isochromen-1-ones has been developed. Sonogashira coupling in the presence of catalytic system - Pd(OAc)2/Ruphos, Et3N base, and tetrahydrofuran solvent under aqueous and room temperature conditions, provided novel 3-(alkynyl)-1H-isochromen-1-ones in excellent yields. The methodology has also been extended toward natural isochromen-1-one-3′-hydroxycorfin and gymnopalynes A analogues. © 2014 Elsevier Ltd. All rights reserved.

Tetrahedron Letters

Efficient copper-free Pd(OAc)2/Ruphos-catalyzed Sonogashira coupling in the preparation of 3′-hydroxycorfin and gymnopalynes A analogues

An efficient, three-component domino reaction of dimedone 1, aromatic aldehydes (2a-o), and 1,3-cyclohexanedione 1a in the regio-selective synthesis of 3,3-dimethyl-9-phenyl-2H-xanthene-1,8(5H,9H)-diones (3a-o) is reported. The desired product, 3 is efficiently promoted by ascorbic acid as an organo catalyst. © 2014 Elsevier Ltd. All rights reserved.

Regioselective synthesis of 3,4,6,7-tetrahydro-3,3-dimethyl-9-phenyl-2H-xanthene-1,8(5H,9H)-diones through ascorbic acid catalyzed three-component domino reaction

Microwave supported, water intervened, nano crystalline TiO2 catalyzed synthesis of 3-(1,5-dioxo-1,5-diphenylpentan-3-yl)quinolin-2(1H)-ones, is described.

RSC Adv.

TiO2 nano crystallites catalyzed water mediated microwave assisted regioselective three component domino hydrolysis/aldol condensation/Michael addition reaction of 3-(1,5-dioxo-1,5-diphenylpentan-3-yl)quinolin-2(1H)-one

A mild and efficient method for the synthesis of thioethers has been developed. The 3-phenylisoquinoline-1(2H)-thione underwent S-alkylation to afford structurally diverse sulfides in high yield. Copyright © 2010 Taylor &amp; Francis Group, LLC.

Phosphorus, Sulfur, and Silicon and the Related Elements

Synthesis of Diversified Thioethers, 1-Aroylalkylisoquinolin-1-yl Thioethers, by Electrophilic S-Alkylation of 3-Phenyl Isoquinoline-1(2H)-thione

A facile and microwave accelerated reaction of 1-chloro-3-(4-chlorophenyl) isoquinoline with various heterocyclic amines, catalyzed by Pd, in the presence of BINAP additive and sodium carbonate as the base, leads to the formation of 3-(4-chlorophenyl)-1-(1H-1,2,3-triazol-1-yl)isoquinoline, 3-(4-chlorophenyl)-1- (1H-imidazol-1-yl)isoquinoline and 3-(4-chlorophenyl)-1-(1H-1,2,4-triazol-1-yl) isoquinoline via Buchwald protocol in good yields. Similarly pyrazolylisoquinolines are also reported. © 2010 Elsevier Ltd.

An effective BINAP and microwave accelerated palladium-catalyzed amination of 1-chloroisoquinolines in the synthesis of new 1,3-disubstituted isoquinolines

Journal	Data powered by TypesetIndustrial & Engineering Chemistry Research
Publisher	Data powered by TypesetAmerican Chemical Society (ACS)
ISSN	0888-5885
Open Access	0