检索结果-南通市图书馆

Facile Synthesis of 4,5-Disubstituted 2H-1,2,3-Triazoles by catalyst-free Cycloaddition between Substituted Vinyl Sul- fones and Sodium Azide under Ambient Conditionst

引用

Chinese Journal of Chemistry 2012年第12期30卷 2786-2790页

作者： Yang Jinjin Yin Wei Liu Renhua Chu Changhu School of Pharmacy Shanghai Key Laboratory of New Drug Design East China University of Science and Technology 130 Meilong Road Shanghai 200237 China

A highly efficient method for readily preparing 4,5-disubstituted 2H-1,2,3-triazoles was found. Under ambient conditions, a catalyst free cycloaddition between substituted vinyl sulfones and sodium azide could be completed in a very short time. In this cycloaddition process, sulfonyl group acts as a leaving group, while its ester group was retained.

关键词： vinyl sulfone sodium azide cycloaddition 1,2,3-triazole catalyst free

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

catalyst-free Specific Synthesis of Heteroaryl Thioethers from Heteroaryl Halides,Thiourea,Alcohols and Water

Catalyst-Free Specific Synthesis of Heteroaryl Thioethers fr...

引用

中国化学会第十三届全国有机合成化学学术研讨会

作者： Xiantao Ma Lei Yu Chenliang Su Qing Xu College of Chemistry and Materials Engineering Wenzhou University College of Optoelectronic Engineering Shenzhen University School of Chemistry and Chemical Engineering Yangzhou University

Owing to their importance in natural product,biological and pharmaceutical chemistry,various methods have been developed for the synthesis of heteroaryl thioethers,which includes transition metal（TM）-catalyzed cross-coupling reactions with thiols,base-mediated nucleophilic aromatic substitution（SNAr） reactions with thiols,1 and SNAr reactions of heteroaryl halides with disulfides or phenylthiotrimethylsilane.2 However,these methods require toxic and smelly organosulfur reagents such as the *** are also interested in using the readily available sulfur surrogates as the sulfur source in organic synthesis.3 As our continuous interests in thioethers,2 utilization of sulfur surrogates in synthesis,3 and the use of alcohols as greener alkyl sources,4 we now developed a new method for synthesis of unsymmetrical heteroaryl thioethers using thiourea as the sulfur surrogates and alcohols as the alkyl sources by a catalyst-,additive-,solvent-,and inert atmosphere-free direct MCR of heteroaryl *** new sulfur transfer method tolerates a wide range of substituted and functionalized substrates and can be extended to heteroaryl selenide synthesis.

关键词： alcohols catalyst free heteroaryl thioethers heteroaryl halides sulfur transfer reaction thiourea

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

catalyst-free Friedel-Crafts Hydroxyalkylation of Imidazo[1,2-α]pyridines with Ethyl Trifluoropyruvate

Catalyst-Free Friedel-Crafts Hydroxyalkylation of Imidazo[1,...

引用

中国化学会全国第十二届有机合成化学学术研讨会

作者： Li,Ke Yang,Ming-Ze Lu,Shuai Zhu,Xinju Hao,Xin-Qi Song,Mao-Ping College of Chemistry and Molecular Engineering Henan Key Laboratory of Chemical Biology and Organic ChemistryZhengzhou University

Remarkable developments have been made on the synthesis of imidazo[1,2-α]pyridine derivatives,1] making a wide range of drugs,including alpidem,olprinone,minodronic acid,zolimidine,necopidem,saripidem and zolpidem,more commercially *** molecules have the ability to modulate biological functions.2] Despite the success of previous work,the development of catalyst-free F-C hydroxyalkylation reaction with improved efficiency is still a long-standing scientific ***,we firstly report the high efficiency of catalyst-free F-C hydroxyalkylation of imidazo[1,2-α]pyridines with ethyl trifluoropyruvate in isopropyl ether.

关键词： catalyst free Friedel-Crafts hydroxyalkylation Imidazo[1,2-α]pyridines

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A synthesis of spirofuran-indenoquinoxalines via isocyanid-based one-pot four-component reaction

引用

Chinese Chemical Letters 2016年第7期27卷 1040-1043页

作者： Nahid Sabouri Gholam Hossein Mahdavinia Behrouz Notash Department of Chemistry Marvdasht Branch Islamic Azad University Department of Chemistry Shahid Beheshti University

A simple and versatile procedure for the combinatorial synthesis of（Z）-dialkyl-5-（alkylimino）-5Hspiro[furan-2,ll’-indeno[l,2-b]quinoxaline]-3,4-dicarboxylates via the catalyst-free one-pot fourcomponent reaction ... 详细信息

关键词： One-pot Multicomponent catalyst free Spirofuranindenoquinoxalines Isocyanide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Superior supercapacitive performance in porous nanocarbons

引用

Journal of Energy Chemistry 2016年第4期25卷 734-739页

作者： Gomaa A.M.Ali Shoriya Aruni Abdul Manaf Divyashree A Kwok Feng Chong Gurumurthy Hegde Chemistry Department Faculty of ScienceAl-Azhar University Faculty of Industrial Sciences and Technology Universiti Malaysia Pahang BMS R and D Centre BMS College of Engineering

Porous nanocarbons with average particle size 20–40 nm were developed using biowaste oil palm leaves as a *** pyrolysis was carried out at 700 °C under nitrogen *** porous nanocarbons showed excellent porous nature along with spherical *** supercapacitor fabricated from porous nanocarbons showed superior supercapacitance performance where high specific capacitance of 368 F/g at 0.06 A/g in 5 M KOH were *** also exhibited high stability(96% over 1700cycles) and energy density of 13 Wh/*** resistance values were obtained by fitting the impedance spectra,thus indicating the availability of these materials as supercapacitors *** presented method is cost effective and also in line with waste to wealth approach.

关键词： Porous carbon nanoparticles Supercapacitor catalyst free Biowaste

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：