检索结果-南通市图书馆

Chinese Chemical Letters 2005年第2期16卷 183-185页

作者： RuiJueHU BaoGuoLI MinXU CollegeofChemistryandChemicalEngineering InnerMongoliaUniversityHohhot010021

Solid superacid, silica-supported polytrifluoromethanesulfosiloxane (SiO2-Si-SCF3) wasfirstly used in the friedel-crafts acylation of ferrocene as a novel catalyst. IR spectra, WAXD andspecific surface area of the sup... 详细信息

关键词： friedel-crafts acylation ferrocene solid superacid catalyst silica-supported polytri-fluoromethanesulfosiloxane.

Prussian Blue Analogue Derived N-Doped Graphitic Carbon Wrapped Iron-Cobalt Nanoparticles as Recyclable Heterogeneous Catalysts for friedel-crafts acylation

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2024年第6期40卷 1116-1126页

作者： LEI Zhenyu SUN Honglei DONG Zhehan SUN Shuaishuai BI Chongyao ZHAN Junling WU Lin JIA Mingjun JIA Mingjun jiamj@*** Department of Physical Chemistry College of ChemistryJilin UniversityChangchun 130012P.R.China

The rational design of efficient heterogeneous catalysts for friedel-crafts acylation reactions is highly desirable for meeting the need for the industrial production of various aromatic ketone compounds and biomass-derived ***,we reported that graphitic carbon wrapped FeCo bimetallic nanoparticles confined in nitrogen-doped carbon nanotubes,which were prepared by pyrolysis of FeCo-based Prussian blue analogue and melamine via a two-stage programmed heating procedure,exhibited excellent catalytic activity and recyclability for the acylation of aromatic compounds with acyl *** oxidized bimetallic species embedded in the external graphitic carbon shell should be the main active sites for the acylation *** graphitic carbon shell and the carbon nanotube could provide effective protection on the active metal species against leaching through multiple interactions,leading to the formation of a highly active and durable heterogeneous catalyst for the acylation reaction.

关键词： Prussian blue analogue N-Doped carbon material Pyrolysis Bimetallic nanoparticle friedel-crafts acylation

The friedel-crafts acylation of Substituted Benzene with 2 - Phenylfuran-3, 4-dicarboxylic Acid Anhydride

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

Chinese Chemical Letters 1998年第2期9卷 125-129页

作者： Nie, XP Ye, XL Peking Univ Dept Chem Beijing 100871 Peoples R China

2-Phenylfuran-3,4-dicarboxylic acid anhydride reacted with seven aromatic compounds, of which five gave keto acids in yields of 94%-63%. The structure of the keto acid was elucidated by reducing it to hydroxy acid and... 详细信息

关键词： friedel-crafts acylation 2-phenylfuran-3,4-dicarboxylic acid anhydride structure elucidation

Solventless friedel-crafts acylation under Microwave Activation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第3期16卷 327-330页

作者： WeiDENG YuXU QingXiangGUO DepartmentofChemistry UniversityofScienceandTechnologyofChinaHefei230026

A novel catalytic system, ZnCl2 supported on alumina, was found to be an efficient and readily available medium for the solvent-free friedel-crafts acylation reactions under microwave irradiation. Good yields and high catalytic efficiencies were observed within short reaction times. Comparing with silica gel, alumina was more efficient under the same conditions.

关键词： friedel-crafts acylation microwave irradiation solvent-free.

The Synthesis of 4-Arylcarbonyl-3-methoxycarbonyl-2-phenylfurans by friedel-crafts acylation Reactions

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2000年第1期11卷 11-14页

作者： Shrong Shi LIN Jun Hua YU Jian Mei WANG Bo YANG Xiu Lin YE (Department of Chemistry. Peking University, Beijing 100871) Department of Chemistry Peking University Beijing 100871 China

Keto esters 8, 4-arylcarbonyl-3-methoxycarbonyl-2-phenylfurans, potential precursors of the synthesis of furofuran lignans, were obtained from dimethyl 2-phenylfuran-3,4-dicarboxylate 2. Diester 2 was selectively hydrolyzed to monoacid 6 followed by converting to its acid chloride 7. friedel-crafts acylation reactions of 7 with aromatic compounds afforded keto esters 8. The geometric structures of 8 and its precursors were elucidated and verified by NMR spectra.

关键词： friedel-crafts acylation selective mono hydrolysis furofuran lignan

Synthesis,Efficiency,and Recyclable Scandium-Complexed Dendritic Nanoreactors on Silica as Lewis Acid Catalyst in friedel-crafts acylation Reactions

在线全文

学校读者我要写书评

暂无评论

Synthesis,Efficiency,and Recyclable Scandium-Complexed Dendr...

The fluorinated substituent onto calix[4]arne architecture via friedel-crafts acylation

中国化学会全国第十一届有机合成化学学术研讨会

作者： Weiping Shen Zhicheng Bao Jing Yu Hua Zhou Fei Wang Department of Chemistry Shanghai University

Scandium-complexed dendritic nanoreactors（SCDNS） on silica,featured with mushroom-like dendrites and deep-falling cavities,were evaluated as catalysts for friedel-crafts acylation *** results showed the nanoenvironment of SCDNS played a dominant role in improving the activity of *** fluorobenzene could be acylated smoothly,which hardly occurs in most ***,the catalysts can be easily recovered by simple filtration and reused for several times without significant loss of activity.

关键词： Scandium Complex Dendrimer Nanoreactors friedel-crafts acylation Nanoenvironment.

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

The fluorinated substituent onto calix[4]arne architecture v...

Synthesis and Properties of Poly(aryl ether ketone) Copolymers Containing 2,7-Naphthalene Moieties

中国化学会全国第十三届大环化学暨第五届超分子化学学术讨论会

作者： Enchao Li Yong Yang Ling-Shen Tang Xian-Fa Shi (Department of Chemistry, Tongji University, Siping Road 1239 Shanghai 200092, China)

A novel fluorinated calix[4]arene derivative was prepared in the presence of dichloromethane via a friedel-crafts acylation.

关键词： calyx fluorine friedel-crafts acylation

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

Chemical Research in Chinese Universities 2006年第1期22卷 114-117页

作者： LIU Si-jie NIU Ya-ming ZHU Xiao-liang WANG Gui-bin JIANG Zhen-hua Alan G. MacDiarmid Institute College of Chemistry Jilin University Changchun 130012 P.R. China

Poly（ aryl ether ketone） copolymers containing 2,7-naphthylene and hydroquinone（HQ） moieties with various compositions were prepared by the reaction of 4,4＇-difluorobenzophenone（DFB） 2,7-naphthylene and hydroquinone in the presence of sodium carbonate and potassium carbonate （ 19： 1, mass ratio） in diphenyl sulfone （DPS）. The thermal analysis results of the copolymers show that the glass transition temperatures（Tgs） increase, while the melting temperatures（Tra） and tile 5.0% weight loss temperatures （ Td ） decrease with the increase of the 2,7-naphthalene moieties. For the copolymers synthesized at a molar fraction of 2,7-naphthalene in the difluoro monomers being over 0.30, no peaks corresponding to the cold crystallization temperature and the melting temperature could be detected, indicating that these copolymers are almost amorphous. The crystal structures of the copolymers with a molar fraction of 2,7-naphthalene being less than 0. 30 are rhombic.

关键词： Poly( aryl ether ketone) Naphthalene derivatives friedel-crafts acylation

Synthesis and Thermal Crosslinking Behavior of Poly(aryl ether ketone)s Containing 1,4-Naphthalene Moieties

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2005年第1期21卷 109-113页

作者： NIUYa-ming ZHANGYun-he CHENXing-bo WANGGui-bin JIANGZhen-hua ResearchCenterofJilinUniversityforSuperEngineeringPlastics MinistryofEducationJilinUniversityChangchun130012P.R.China

A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,4-naphthalenedicarboxylic acid with thionyl chloride. The friedel-crafts acylation of compound 1 with fluorobenzene afforded compound 2 in a 80% yield. The polycondensation of compound 2 with various bisphenols in tetramethylene sulfone(TMS) in the presence of excess potassium carbonate as a condensation reagent was carried out at 210 ℃ to quantitatively afford the corresponding poly(aryl ether ketone)s(compounds 3_8) containing 1,4-naphthalene moieties. Thermal analyses showed that the polymers have T g values ranging from 496 to 500 K and are thermally stable in air with initial mass loss above 500 ℃. These novel polymers exhibited an excellent solubility in organic solvents including NMP, DMAc, and chloroform, etc. In addition, the glass transition temperatures of these polymers increased and the polymers became insoluble in chloroform after treated at 260 ℃, indicating the occurrence of a thermal crosslinking reaction.

关键词： Poly(aryl ether ketone) Naphthalene derivatives friedel-crafts acylation Thermal crosslinking properties

Solvent-free synthesis of some ethyl arylglyoxylates

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 55-57页

作者： Ji Ming Xiang Bao Lin Li School of Chemistry and Materials Science and The Key Laboratory of Medicinal Plant Resource & Natural Pharmaceutical Chemistry of Ministry of Education Shaanxi Normal University Xi'an 710062 China Department of Chemistry Ankang University Ankang 725000 China

An efficient and convenient approach to synthesize of ethyl arylglyoxylates by solvent-free grinding was described. Eight ethyl arylglyoxylates had been synthesized by this method, this method provided several advantages such as little pollution, high yield, good selectivity, and simple workup procedure, their structures were confirmed by IR, ^1HNMR.

关键词： Ethyl arylglyoxylate friedel-crafts acylation Solvent-free reaction Synthesis