检索结果-南通市图书馆

Chinese Chemical Letters 2011年第5期22卷 551-554页

作者： Kirti s.Niralwad Bapurao B.shingate murlidhar s.shingare Organic Research Laboratory Department of ChemistryDr.Babasaheb Ambedkar Marathwada University

Amidoalkyl naphthols have been synthesized in high yields in the presence of 1-hexanesulphonic acid sodium salt as an inexpensive solid catalyst under solvent-free conditions and *** catalyst provides clean conversion... 详细信息

关键词： Aldehydes Naphthols 1-Hexanesulphonic acid sodium salt Amidoalkyl naphthols Microwave-irradiation

Novel,efficient,and green procedure for the synthesis of 1,5-benzodiazepines catalyzed by MgBr_2 in aqueous media

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第1期20卷 32-36页

作者： shivaji s.Pawar murlidhar s.shingare shivaji N.Thore Department of Chemistry Vinyakrao Patil Mahavidyala Vaijapur Department of Chemistry Dr.Babasaheb Ambedkar Marathwada University

MgBr2 performs as a novel catalyst for the synthesis of various 1,5-benzodiazepine derivatives from wide range of substituted o- phenylenediamines and various ketones in good to excellent isolated yields （93-98%） using water as solvent at ambient temperature. several solvents were examined for this reaction; however, in terms of reaction yield and time, water was found to be the optimum solvent. The remarkable advantages offered by this method are easily and inexpensive available catalyst, simple procedure, mild conditions, much faster （40-60 man） reactions and good to excellent yields of products.

关键词： MgBr2 o-Phenylenediamines Ketones Aqueous media 1,5-Benzodiazepine

Polyethylene glycol(PEG) mediated expeditious synthetic route to 1,3-oxazine derivatives

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第8期22卷 915-918页

作者： Pravin V.shinde Amol H.Kategaonkar Bapurao B.shingate murlidhar s.shingare Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004MaharashtraIndia

Various 1,3-oxazine derivatives were synthesized in high yields,within shorter reaction times using PEG-400 as a safer medium/ *** synthetic route is exceedingly easy and avoids the use of acid/base catalysts.

关键词： Ecofriendly synthetic protocol Green chemistry 1 3-Oxazines Polyethylene glycol(PEG)

Glyoxylic acid as catalyst:A simple selective synthesis of 1,2-disubstituted benzimidazoles in aqueous media

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第9期19卷 1055-1058页

作者： shivaji s.Pawar Deepak V.Dekhane murlidhar s.shingare shivaji N.Thore Department of Chemistry Vinyakrao Patil Mahavidyala VaijapurAurangabad 423701(M.S.)India Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004(M.S.)India

Glyoxylic acid （5 mol%） performs as a novel highly water-soluble catalyst for the synthesis of 2-aryl-l-arylmethyl-lH- benzimidazoles from a wide range of substituted o-phenylenediamines and various substituted aldehydes in good to excellent isolated yields （85-95%） using water as solvent at ambient temperature. The remarkable advantages offered by this method are easily and inexpensive available catalyst, simple procedure, mild conditions, much faster （20--40 rain） reactions and excellent yields of products.

关键词： Glyoxylic acid Benzimidazoles Aqueous media 2-Aryl-l-arylmethyl-lH-benzimidazoles o-Phenylenediamines and aldehydes

synthesis of bis(indolyl) methanes using aluminiumoxide(acidic) in dry media

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第1期21卷 39-42页

作者： sandip A.sadaphal Amol H.Kategaonkar Vilas B.Labade murlidhar s.shingare Organic Research Laboratory Department of ChemistryDr.Babasaheb Ambedkar Marathwada UniversityAurangabadMS 431001 India

Heterogeneous catalyst aluminium oxide(acidic) is found to be an effective catalyst for the solvent-free condensation reaction of indole with aldehydes in microwave irradiation with shorter reaction time and higher yi... 详细信息

关键词： Aluminium oxide(acidic) Indole Aldehydes Bis(indolyl) methanes Microwave irradiation Dry media

An efficient synthesis of benzofuran derivatives under conventional/non-conventional method

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第12期21卷 1439-1442页

作者： suryakant B.sapkal Kiran F.shelke Bapurao B.shingate murlidhar s.shingare Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad(M.S.)431004India

l-Methyl-3-ethyl imidazolium bromide[meim]Br/basic alumina（Al2O3） has been found to promote the cyclocondensation of chloroacetone/chloroethyl acetate with salicylaldehydes under conventional as well as microwave ir... 详细信息

关键词： [meim]Br/Al2O3 Benzofuran Cyclocondensation Conventional Non-conventional methods

Microwave assisted convenient synthesis of quino[2,3-b][1,5]benzoxazepines

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第5期20卷 557-561页

作者： swapnil s.sonar sandip A.sadaphal shivaji s.Pawar Bapurao B.shingate murlidhar s.shingare Department of Chemistry Dr. Babasaheb Ambedkar Marathwada UniversityAurangabad 431004MSIndia Department of Chemistry Vinayakrao Patil Mahavidyalaya VaijapurAurangabad 423701MSIndia National Chemical Laboratory Pune 411008MSIndia

A convenient synthesis of quino[2,3-b] [ 1,5]benzoxazepines from substituted 2-chloroquinoline-3-carbaldehyde and 2-hydroxy- aniline by using stable, non-toxic and inexpensive catalyst 1,8-diazabicyclo-undecan-7-ene （DBU）/silica gel is described. This method affords the quino[2,3-b][1,5]benzoxazepines under the influence of microwave irradiation （360 W） in solvent-free conditions within short reaction times （2-3 min）, giving high yields of products （93-96%）.

关键词： Quino[2,3-b][1.,5]benzoxazepines DBU/silica gel Microwave irradiation solvent-free

Lithium bromide catalyzed solvent free method for synthesis of 2-substituted benzimidazoles and imidazopyridines

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第5期21卷 519-523页

作者： Deepak V.Dekhane shivaji s.Pawar sunil V.Gupta murlidhar s.shingare shivaji N.Thore Department of Chemistry Vinyakrao Patil Mahavidyala VaijapurAurangabad 423701MSIndia Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004MSIndia

The first successful lithium bromide mediated solvent free condensation of arylenediamine and esters to obtain 2-substituted benzimidazole and imidazopyridine in good to excellent yields is described.

关键词： Benzimidazoles Arylenediamine Aliphatic esters Lithium bromide Imidazopyridines

Alum:An efficient catalyst for one-pot synthesis of α-aminophosphonates

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第9期20卷 1042-1046页

作者： swapnil s.sonar Kiran F.shelke Gopal K.Kakade Bapurao B.shingate murlidhar s.shingare Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431004 MSIndia National Chemical Laboratory Pune 411008 MSIndia

Alum （KAl（sOa）E.12H2O） is an inexpensive, efficient, non-toxic and mild catalyst for the one-pot synthesis of α-aminopho- sphonates. A three component reaction of an aldehyde/ketone, an amine and triethyl phosphite was carried out under solvent-free conditions to afford the corresponding α-aminophosphonates in short reaction times and high yields with the green aspects by avoiding toxic catalysts and solvents. 2009 murlidhar s. shingare. Published by Elsevier B.V. on behalf of Chinese Chemical society. All rights reserved.

关键词： Alum α-Aminophosphonates Aldehyde/ketone Amine Triethyl phosphite solvent-free

Regiospecific oxidation of an alkyl group of aromatic amine to carbonyl group by DDQ in ***

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第9期22卷 1039-1042页

作者： Madhav s.Mane Ravi s.Balaskar sandip N.Gavade Pramod N.Pabrekar murlidhar s.shingare Dhananjay V.Mane Organic Research Laboratory S.C.S.CollegeOmerga413606MSIndia V.G.Vaze College Mulund(E)Mumbai400081MSIndia Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad431004MSIndia

The regiospecific oxidation of alkyl group of both sterically hindered and unhindered aromatic amine to corresponding carbonyl compound was done in aq. medium by using DDQ. The optimized reaction protocol was found to be most simple, high yielding and novel method for oxidation of alkyl group of aromatic amine in to its carbonyl compound.

关键词： DDQ Aq. medium Regiospecific oxidation Aromatic amine