Synthesis, Structure and Characteriz

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篇1：Synthesis of 4-Aminosalicylglycine

Synthesis of 4-Aminosalicylglycine

To search for a better prodrug of 4-aminosalicylic acid that is expected to deliver stably parent drug to colon against the inflammatory bowel disease, a novel 4-aminosalicylic acid derivative was designed and synthesized from 4-aminosalicylic acid. 4-Aminosalicylglycine was prepared from 4-aminosalicylic acid by protecting amino and hydroxyl groups with benzyloxycarbonyl and acetyl, respectively, then the carboxylic acid was converted to acyl chloride which was treated with glycine. After removing the protection groups, 4-aminosalicylglycine was obtained. All the compounds were characterized by FT-IR, 1H-NMR, 13C-NMR spectra. In vivo experiment on rats suggested that the curative effect of 4-aminosalicylglycine was more effective than that of 4-aminosalicylic acid.

作 者：Zheng Bao ZHAO JING GUO Yuan Gui WEI Tong Da LIANG  作者单位：College of Pharmacy, Shanxi Medical University, Taiyuan 030001 刊 名：中国化学快报（英文版）  ISTIC SCI英文刊名：CHINESE CHEMICAL LETTERS 年，卷(期)： 16(7) 分类号：O6 关键词：4-Aminosalicylio acid   4-aminosalicylglycine   inflammatory bowel disease  

篇2：Synthesis and Characterization of a

Synthesis and Characterization of a Novel Biomaterial:Maleic Anhydride-modified Poly(dl-lactic acid)

A novel modified poly(dl-lactic acid) (PDLLA) was obtained by covalently grafting of maleic anhydride onto the backbone of PDLLA, attempting to improve PDLLA's hydrophilicity and cell affinity and to provide reactive groups for further chemical modification. FTIR, 13C NMR and DSC were used to characterize the maleic anhydride-modified PDLLA.

作 者：Yan Feng LUO Yuan Liang WANG Xu Feng NIU Jun PAN Liang Ping SHI  作者单位：Key Lab for Biomechanics & Tissue Engineering under the State Ministry of Education in China, Bioengineering College, Chongqing University, Chongqing ,400044 刊 名：中国化学快报(英文版)  ISTIC SCI英文刊名：CHINESE CHEMICAL LETTERS 年，卷(期)： 15(5) 分类号： 关键词：Poly(dl-lactic acid)   maleic anhydride   modification   characterization  

篇3：SYNTHESIS AND CHARACTERIZATION OF OR

SYNTHESIS AND CHARACTERIZATION OF ORGANO-SOLUBLE FLUORINATED POLYIMIDES FROM 4,4-BIS(3-AMINO-5-TRIFLUOROMETHYLPHENOXY)-B

An aromatic diamine monomer, 4,4'-bis(3-amino-5-trifluoromethyl phenoxy)-biphenyl (TFBPDA), was synthesized via the nucleophilic displacement reaction of 3,5-dinitrobenzotrifluoride and 4,4'-biphenol. The monomer was reacted with various aromatic dianhydrides via the high temperature polycondensation procedure to provide a series of polyimides. The polyimides, PI-1 to PI-4, show good solubility not only in aprotic solvents, such as N-methyl-2-pyrrolidinone and N,N-dimethylacetamide, but also in many common solvents, such as m-cresol, chloroform and cyclopentanone. PI-4, derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride and TFBPDA, was even soluble in toluene. Moreover, PI films exhibit good thermal stability, outstanding transparency in the visible light region and acceptable mechanical and electrical properties. The excellent combined properties of the polyimides make them as a good candidate for fabricating microelectronics.

作 者：Gui-long Wu Jin-gang Liu Zuo-bang Li Zi-yi Ge Lin Fan Shi-yong Yang  作者单位：Gui-long Wu,Zuo-bang Li(Institute of Polymer Science and Technology, Hebei University of Technology, Tianjin 300130, China)

Jin-gang Liu,Zi-yi Ge,Lin Fan,Shi-yong Yang(Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China)

刊 名：高分子科学（英文版）  ISTIC SCI英文刊名：CHINESE JOURNAL OF POLYMER SCIENCE 年，卷(期)： 23(1) 分类号： 关键词：Diamine   Polyimide   Trifluoromethyl   Nucleophilic displacement   Solubility  

篇4：Synthesis of Dinaphtho-dioxaphosphep

Synthesis of Dinaphtho-dioxaphosphepin-4-oxides, Epoxides and Bisphosphonates

A few new seven-membered phosphorus heterocyclic compounds and bis-phosphonates (5a-5g, 5f, 5g', 9 and 10) were prepared by the reaction of 4-bromo dioxaphosphepin (2) with various Grignard reagents followed by their oxidation with H2O2. All the compounds were thoroughly characterized by elemental analysis, IR, 1H, 13C, 31PNMR and mass spectral data. Their antimicrobial activity was evaluated and some of them possess significant activity.

作 者：KASTHURIAH Maddali UMA RAVI SANKAR Arigala SIVA KUMAR Bitragunta SURESH REDDY Cirandur NAGA RAJU Chamarthi  作者单位：Department of Chemistry,Sri Venkateshwara University,Tirupathi-517502,India 刊 名：中国化学（英文版）  SCI英文刊名：CHINESE JOURNAL OF CHEMISTRY 年，卷(期)： 27(2) 分类号：O6 关键词：1,1'-binaphthyl-2,2'-diol,4-bromo-dinaphtho[2,1-d: 1',2'-f] [1,3,2]dioxaphosphepine 4-oxide,methyle-nebis[dinaphtho-dioxaphosphepin 4-oxide],antimicrobial activity  

篇5：Synthesis and Characterization of No

Synthesis and Characterization of Novel Trifluoromethylphenyl Silane Monomers

Using 3,5-bis(trifluoromethyl)bromobenzene and methyltrimethoxysilane or tetraethoxysilane as raw materials, novel trifluoromethylphenyl silanes were synthesized via Grignard reaction and substitution reaction, and the molecular structure of silane products was characterized by NMR, FT-IR, MS techniques and elemental analysis. The reaction result showed that the reactivity of Grignard reagent was different in THF and diethyl ether when subjected to substitution reaction, which gave three products with different substitution degree. According to the current work, mono-, di- and tri-substituted product can be obtained selectively from the same reactants by controlling the reaction condition.

作 者：LI Zhanxionga DU Lipinga TANG Songqing WANG Changyaoa  作者单位：LI Zhanxionga,DU Lipinga,WANG Changyaoa(College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215021, China)

TANG Songqing(Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 32, China)

刊 名：中国化学（英文版）  SCI英文刊名：CHINESE JOURNAL OF CHEMISTRY 年，卷(期)：2009 27(12) 分类号：O6 关键词：synthesis   Grignard reaction   substitution   trifluoromethylphenyl   silane synthesis   Grignard reaction   substitution   trifluoromethylphenyl   silane  

篇6：Synthesis and ion-binding studies of

Synthesis and ion-binding studies of platinum(Ⅱ) phenanthroline complexes containing crown ether moiety

Two new benzo-[15]-crown-5 attached phenanthroline platinum(Ⅱ) complexes with the general formula Pt(phen)X2, where X = Cl (1), C≡CC6H5 (2) have been synthesized, and their absorption and luminescence response towards metal ions have been studied.

作 者：HAN Xue WU Lizhu ZHANG Liping TUNG Chenho  作者单位：Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China 刊 名：科学通报（英文版）  SCI英文刊名：CHINESE SCIENCE BULLETIN 年，卷(期)：2006 51(8) 分类号：O6 关键词：phenanthroline platinum(Ⅱ) complex   MLCT excited state   benzo-[15]-crown-5 phenanthroline  

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