中国化学快报

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Insertion of Selenium into Zinc Carbon Bond and Application in Synthesis of Arylselenoester

Xin Hua XU, Wen Qi LIU

中国化学快报. 2002, 13(04): 283-284.

摘要 ( )

可视化

Selenium was inserted into the zinc carbon bond of aryl zinc halides to form corresponding zinc selenoates.They reacted in THF-HMPA with acylhalides to afford the selenoesters in high yields.

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One-Pot Reaction of Aldehydes,α-Haloketones and (Phenylsulfonyl)acetonitrile Promoted by SmI₃

Xue Sen FAN, Yong Min ZHANG

中国化学快报. 2002, 13(04): 285-286.

摘要 ( )

可视化

One-pot reaction of aldehydes,α-haloketones and (phenylsulfonyl)acetonitrile promoted by SmI₃ proceeded smoothly to give 1-cyano-1-phenylsulfonyl-2-aryl-3-aroyl-propane derivatives in moderate to good yields.

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The Rearrangement of 2-Benzothiazolylthioacetyl Hydrazide in Synthesis of s-Triazolo[3,4-b]benzothiazole-3-thiol

Yan ZHANG, Ren Zhong QIAO, Chao Feng DAI, Peng Fei XU, Zi Yi ZHANG

中国化学快报. 2002, 13(04): 287-289.

摘要 ( )

可视化

The rearrangement reaction of 2-benzothiazolylthioacetyl hydrazide 1 with potassium hydroxide and carbon disulfide in ethanol to produce s-triazolo[3,4-b]benzothiazole-3-thiol 3 was described.3 also can be obtained from 2-benzothiazolylhydazine 2 and the two methods for getting 3 were compared.Mannich reaction of compounds 3 was reported too.

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Synthesis of 6(E)-Geranylgeraniol-19-oic Acid

Shu Hua LI, Wei Dong LI, Yu Lin LI

中国化学快报. 2002, 13(04): 290-291.

摘要 ( )

可视化

Facile synthesis of 6(E)-geranylgeraniol-19-oic acid 1,a naturally occurring alicyclic diterpene acid,by a Horner-Wadsworth-Emmons olefination of two readily available fragments 2 and 3,is described.

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Synthesis of 5-Deoxy-5-Acyloxyiminoavermectin B1 Derivatives

Xi Guang LIU, Jing Ping WU, Xiao Mei LIANG, Dao Quan WANG

中国化学快报. 2002, 13(04): 292-293.

摘要 ( )

可视化

Four 5-deoxy-5-acyloxyiminoavermectin B1 derivatives 4a~d were synthesized via three steps from avermectin B1 and their biological activities were tested against Heliothis armigera,Laphygma exigua and Musca domestica.

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Synthesis of a Novel Type of Glycophosphate Mimics

Qiang XIAO, Yong JU, Yu Fen ZHAO

中国化学快报. 2002, 13(04): 294-295.

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可视化

A series of novel type of glycophosphate mimics are synthesized by Todd reaction and their structure were determined on the basis of NMR,ESI-MS.

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A Convenient Synthesis of the Substituted 2,3-Diarylindole the Potent Selective COX-2 Inhibitors

Wen Hui HU, Zon Ru GUO, Ai Ping BAI, Zhi Bin XU

中国化学快报. 2002, 13(04): 296-298.

摘要 ( )

可视化

Phenyl sulfone-containing 2,3-diarylindole derivatives were designed and identified to be selective COX-2 inhibitors.A convenient synthetic route was also developed for the synthesis of the novel inhibitors.

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DNA Modification with Photochromic Spiro Compounds

Peng ZHANG, Ji Ben MENG, Teruo Matsuura, Yong Mei WANG

中国化学快报. 2002, 13(04): 299-302.

摘要 ( )

可视化

The photochromic spiropyrans and spirooxazine having a succinimidyl ester or isothiocyanate pendant group can form covalent products with transaminated DNA. The absorption spectra and solid reflection spectra of modified DNA with these photochromic spiro compounds were investigated.

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The Purification of Glucose Type Glycosyl Nitrate and the Synthesis of Spacer-armed N-Acetyllactosamines and Their Dimers

Qing LI, Hui LI, Bin SU, Xiang Bao MENG, Meng Shen CAI, Zhong Jun LI

中国化学快报. 2002, 13(04): 303-305.

摘要 ( )

可视化

3,6-di-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-2-azido-2-deoxy-β-D-glucoppyranosyl nitrate could be separated from its mannose type isomer by glycosylation according to the reactivity difference of these two compounds.The pure glucose type nitrate can be converted to corresponding trichloroacemidate,which reacted with spacer arms in solution of CH₂Cl₂ with BF₃·Et₂O as promoters to give desired glycosides and dimers.

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Electrochemical Synthesis of Polythiophene in an Ionic Liquid

Jia Hua SHI, Xun SUN, Chun He YANG, Qing Yu GAO, Yong Fang LI

中国化学快报. 2002, 13(04): 306-307.

摘要 ( )

可视化

Polythiophene (PTh) was prepared by the direct electrochemical synthesis in an ionic liquid ([BMIM]PF₆ containing 0.1 mol/L thiophene by cyclic voltammetry,constant potential and constant current techniques.It is found that smooth and blue-green PTh films can be obtained at a potential of ca.+1.75 V (vs.Ag/AgCl) or a current of ca.1.5 mA cm^-2 in the ionic liquid.

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Preparation of p-1,1,3,3-Tetramethylbutylphenol by Using Nafion-H Catalyst

Li Qin YOU, Guo Rong ZHENG, Ping LU

中国化学快报. 2002, 13(04): 308-310.

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可视化

p-1,1,3,3-Tetramethylbutylphenol was prepared by the alkylation of the phenol with Nafion catalyst in extremely high yield.Various reaction conditions were investigated,including the reaction temperature,reaction time,ratio of the starting material,amount of the Nafion catalyst and the recycle times of the catalyst.

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Vapor-phase Nitration of Benzene to Nitrobenzene over Supported Sulfuric Acid Catalyst

Jing Lin CHEN, Wei Guo CHENG, Hong Feng LIU, Qing Song LIN, Lian Hai LU

中国化学快报. 2002, 13(04): 311-314.

摘要 ( )

可视化

Vapor-phase nitration of benzene over solid acid catalyst is expected to be a clean process with no sulfuric acid waste.We investigated this process over solid acidic catalysts utilizing diluted nitric acid (60-70%) as nitrating agent,and found that supported sulfuric acid catalyst exhibited a very high catalytic activity.Under the conditions of reaction temperature 160-170℃,space velocity (SV) 1200 h^-1,the yield and the space-time yield (STY) of nitrobenzene (NB) based on HNO₃ were more than 98% and 0.75 kg·kgcat^-1·h^-1 over 10% H₂SO₄/SiO₂ (by weight) catalyst respectively.

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Asymmetric Polymerization of Menthyl Methacrylate by Anionic Catalysts

Yong An XU, Hong XUE, Lian Xun GAO, Meng Xian DING

中国化学快报. 2002, 13(04): 315-316.

摘要 ( )

可视化

In this paper,(-)menthyl methacrylate((-)MnMA) was polymerized at-78℃ in toluene with three types of anionic catalysts,which were complexes of fluorenyllithium with (-)sparteine-((-)-Sp) ,(S,S)-(+)-2,3-dimethoxy-1,4-bis(dimethylamino)butane((+)DDB) and N,N,N',N'-tetra-methylethylenediamine(TMEDA),and the chiral optical property of the obtained polymer was studied.The circular dichroism (CD) spectrum of the polymer showed negative Cotton effect

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Preparation and Cyclic Voltammetry Characterization Of Cu-dipyridyl Imprinted Polymer

Yi Ning ZENG, Ning ZHENG, Peter G. OSBORNE, Yuan Zong LI, Wen Bao CHANG, Zong Mu WANG

中国化学快报. 2002, 13(04): 317-320.

摘要 ( )

可视化

Polymer capable of specific binding to Cu-dipyridyl complex was prepared by molecular imprinting technology.The binding specificity of the polymer to the template (Cu-dipyridyl complex) was investigated by cyclic voltametric scanning using the carbon paste electrode modified by polymer particles in phosphate buffer solution.Factors that influence rebinding of the imprinted polymer were explored.The result demonstrated that the cyclic voltammetry was an efficient approach to explore interactions between template and imprinted polymers.

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A Novel Oligosaccharide from the Mucus of the Loach

Chuan Guang QIN, Kai Xun HUANG, Hui Bi XU

中国化学快报. 2002, 13(04): 321-324.

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可视化

A novel oligosaccharide was isolated and purified from the mucus of the loach,Misgurnus anguillicaudatus.It was identified by several qualitative tests and characterized by elementary analysis,UV and IR spectrum.Its average molecular weight (M_w=1539.4) was determined by gel permeation chromatography.The major structural monomers of Misgurnus anguillicaudatus oligosaccharide were identified to be D-galactose and L-fucose by paper chromatography and gas chromatography.

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A New Ceramide from the Ascomycete Tuber indicum

Jin Ming GAO, An Ling ZHANG, Chen Ying WANG, Xiang Hua WANG, Ji Kai LIU

中国化学快报. 2002, 13(04): 325-326.

摘要 ( )

可视化

A new C_-18 phytosphingosine derivative (1) was isolated from the fruiting bodies of Tuber indicum. Its structure was established as (2S, 3S, 4R, 2'R)-2-N-(2/-hydroxytricosano-yl)-octadecan-l, 3,4-triol by spectral and chemical methods.

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A New Polyphenolic Compound from Rubus aleaefolius and Its Inhibitory Activity on Mammalian Cell Cycle at G₀/G₁ Phase

Cheng Bin CUI, Qing Chun ZHAO, Bing CAI, Xin Sheng YAO, Hiroyouki OSADA

中国化学快报. 2002, 13(04): 327-330.

摘要 ( )

可视化

Rubuphenol (1),a new polyphenolic compound,was isolated together with the known ellagic acid (2) as new cell cycle inhibitors from Rubus aleaefolius Poir.through a bioassay-guided separation procedure and the structure of 1 was elucidated by spectroscopic method.Compounds 1 and 2 inhibited the cell cycle of tsFT210 cells at the G₀/G₁ phase respectively with the MIC values of 14.6μM and 10.3μM.

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Huperzine W,a Novel 14 Carbons Lycopodium Alkaloid from Huperzia serrata

Chang Heng TAN, Xiao Qiang MA, Guo Fu CHEN, Shan Hao JIANG, Da Yuan ZHU

中国化学快报. 2002, 13(04): 331-332.

摘要 ( )

可视化

Huperzine W,a novel 14 carbons Lycopodium alkaloid,was isolated from the whole plant of Huperzia serrata,and its stucture was determined by spectroscopic analysis.

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Saluenolide A,A Novel Eremophilanolide from Senecio saluenensis

Yu ZHAO, Peng WANG, Simon PARSONS, David W. H. RANKIN, FranÇise GUÉITTE, Thierry SEVÉET, Hong YU, Yi Neng HE, Xiao Jiang HAO

中国化学快报. 2002, 13(04): 333-334.

摘要 ( )

可视化

From Senecio saluenensis,a novel eremophilanolide Saluenolide A was isolated.Its structure was elucidated by 2D-NMR technique and X-ray diffraction.

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Two New Xanthone Glycosides from Polygala tenuifolia

Yong JIANG, Peng Fei TU

中国化学快报. 2002, 13(04): 335-336.

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可视化

Two new xanthone glycosides,polygalaxanthone Ⅳ and Ⅴ were isolated from the roots of Polygala tenuifolia Willd.Their structures were established as 6-O-[(α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl]-1-hydroxy-3,7-dimethoxyxanthone (polygalaxanthone IV),and 6-O-[α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranosyl]-1,3-dihydroxy-7-methoxyxanthone (polyga-laxanthone Ⅴ),respectively,on the basis of chemical and spectral evidence.

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Two New C-glucoside Flavonoids from Leaves of Crataegus pinnatifida Bge.var.major N.E.Br.

Pei Cheng ZHANG, Sui Xu XU

中国化学快报. 2002, 13(04): 337-340.

摘要 ( )

可视化

Two new C-glucoside flavonoids,namely 8-C-β-D-(2"-O-acetyl) glucofuranosyl apigenin and 3"-O-acetylvitexin,were isolated from leaves of Crataegus pinnatifida Bge.var.major N.E.Br..Their structures were elucidated by the spectroscopic means and chemical evidence.

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A New Limonoid from the seed of Aphanamixis polystachya

Hua Ping ZHANG, Shao Hua WU, Xiao Dong LUO, Yun Bao MA, Da Gang WU

中国化学快报. 2002, 13(04): 341-342.

摘要 ( )

可视化

A new limonoid named rohituka-15 1,with a known limonoid dregeana-1 2,was isolated from the seed of Aphanamixis polystachya (Meliaceae).The ¹³C NMR data assignment of dregeana-1 2 and the structural elucidation of the new compound 1 were based on spectral analysis including ¹H-¹H COSY,HMQC and HMBC experiments.

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Sesquiterpene Lactones from Elephantopus scaber

Qiao Li LIANG, Zhi Da MIN

中国化学快报. 2002, 13(04): 343-344.

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可视化

A new germacranolide sesquiterpene lactone,isoscabertopin,was isolated from Elephantopus scaber together with the known scabertopin.Their structures were determined by spectroscopic methods.

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Two New Pentacyclic Triterpenes from Sabia parviflora

Jin CHEN, Bin CHEN, Jun TIAN, Feng E WU

中国化学快报. 2002, 13(04): 345-348.

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可视化

Two new pentacyclic triterpene acids,1α,3β-dihydroxyl-olean-12-en-28-oic acid and 1α,2α,3β-trihydroxyl-olean-12-en-28-oic acid,were isolated from the arial parts of Sabia parviflora.

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Liquid-liquid Extraction System Based on Non-ionic Surfactant-salt-H₂O and Mechanism of Drug Extraction

Lei LI, Feng LIU, Xiang Xu KONG, Shun SU, Ke An LI

中国化学快报. 2002, 13(04): 349-350.

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可视化

Extraction behavior of chlorpromazine hydrochloride (CPZ) and procaine hydro-chloride (PCN) in the system described in the title was studied.Research shows that the extraction efficiency of CPZ can amount to 96% by twice extraction,while that of PCN is 77%.This system produces the distribution coefficients (K_D) of 12.3 and 2.6 respectively for CPZ and PCN.Extraction mechanism is deduced according to ultraviolet and molecular fluorescence spectra variation of the drugs in the system studied.

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Impedance Characterization of Adsorption Process of Calmodulin on Au Substrate and its Combination with Ca²⁺

Ke Qiang DING, Zhen Bin JIA, Qing Fei WANG, Juan BAI, Ru Ting TONG, Xin Kui WANG, Hui Bo SHAO

中国化学快报. 2002, 13(04): 351-354.

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可视化

In this paper,the adsorption process of calmodulin (CaM) on Au substrate was first investigated with electrochemical impedance spectroscopy (EIS) method.The result reveals that the adsorption of the protein-calmodulin contains two steps,i.e.,one short quick step followed by a slow one.The complexation of calmodulin with Ca²⁺ was also first probed using EIS technique,in which the complexation of CaM with Ca²⁺ could be reflected by the change of apparent membrane capacitance(C_app) clearly.In all above measurements,a redox couple Fe(CN)₆^3-/ Fe(CN)₆^4- was used as probing-pin to reflect all the changes occurring in the above process.Our work suggests that some biological processes of CaM could be studied using EIS method conveniently.

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A Method of Determining Selectivity Coefficients Based on the Practical Slope of Ion Selective Electrodes

Hai Xia WANG, Min PU

中国化学快报. 2002, 13(04): 355-358.

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可视化

It is a problem to be solved that the experimental selectivity coefficients of ion selective electrodes (ISEs) depend on the activity.This paper studied the new method of determining selectivity coefficients.A mixed ion response equation,which was similar to Nicolsky-Eisenman (N-E) equation recommended by IUPAC,was proposed.The equation includes the practical response slope of ISEs to the primary ion and the interfering ion.The selectivity coefficient was defined by the equation instead of the N-E equation.The experimental part of the method is similar to that based on the N-E equation.The values of selectivity coefficients obtained with this method do not depend on the activity whether the electrodes exhibit the Nernst response or non-Nernst response.The feasibility of the new method is illustrated experimentally.

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Density Functional Studies of the Reaction of Ytterbium Monocation with Fluoromethane: C-F Bond Activation and Electron-Transfer Reactivity

Dong Ju ZHANG, Cheng Bu LIU

中国化学快报. 2002, 13(04): 359-362.

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可视化

The potential energy surface and reaction mechanism corresponding to the reaction of ytterbium monocation with fluoromethane,which represents a prototype of the activation of C-F bond in fluorohydrocarbons by bare lanthanide cations,have been investigated for the first time by using density functional theory.A direct fluorine abstraction mechanism was revealed,and the related thermochemistry data were determined.The electron-transfer reactivity of the reaction was analyzed using the two-state model,and a strongly avoided crossing behavior on the transition state region was shown.The present results support the reaction mechanism inferred from early experimental data and the related thermochemistry data can provide a guide for further experimental researches.

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Quantitative Structure-Property Relationship on Prediction of Surface Tension of Nonionic Surfactants

Zheng Wu WANG, Gan Zuo LI, Jian Hai MU, Xiao Yi ZHANG, An Jing LOU

中国化学快报. 2002, 13(04): 363-366.

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可视化

A quantitative structure-property relationship (QSPR) study has been made for the prediction of the surface tension of nonionic surfactants in aqueous solution.The regressed model includes a topological descriptor,the Kier & Hall index of zero order (KH0) of the hydrophobic segment of surfactant and a quantum chemical one,the heat of formation (ΔH_f) of surfactant molecules.The established general QSPR between the surface tension and the descriptors produces a correlation coefficient of multiple determination,r²=0.9877,for 30 studied nonionic surfactants.

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Bonding and Mössbauer Isomer Shifts in (Tl,Pb)-1223 Cuprate

Fa Ming GAO, Dong Chun LI, Yan Zhi WANG, Yong Jun TIAN, Min Zi CHEN, Si Yuan ZHANG

中国化学快报. 2002, 13(04): 367-370.

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可视化

By using the chemical bond theory of dielectric description,the chemical bond parameters of (Tl,Pb)-1223 was calculated.The results show that the Sr-O,Tl-O,and Ca-O types of bond have higher ionic character and the Cu-O types of bond have more covalent character.Mössbauer isomer shifts of ⁵⁷Fe and 119Sn doped in (Tl,Pb)-1223 were calculated by using the chemical environmental factor,h_e,defined by covalency and electronic polarizability.Four valence state tin and three valence iron sites were identified in ⁵⁷Fe,and ¹¹⁹Sn doped (Tl,Pb)-1223 superconductor.We conclude that all of the Fe atoms substitute the Cu at square planar Cu (1) site,whereas Sn prefers to substitute the square pyramidal Cu (2) site.

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Semidifferential Electroanalysis of Aqueous Triton X-100/Toluene/H₂O Microemulsion

Chun Sheng MO, Zhen Zhong HUANG, Ming Hua ZHONG

中国化学快报. 2002, 13(04): 371-374.

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可视化

Semidifferential electroanalysis is used as an effective method for investigating microstructure and structural transition of Triton X-100 microemulsions.

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Synergetic Effects of UV/Fe³⁺ Combined with Electrocatalysis for p-Nitrophenol Degradation

Ming Hua ZHOU, Zu Cheng WU, Da Hui WANG

中国化学快报. 2002, 13(04): 375-378.

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可视化

Synergetic effects for p-nitrophenol degradation were observed in the combination of two-advanced oxidation processes,UV/Fe³⁺ and electrocatalysis.The enhancement of removal rate for p-nitrophenol and COD was around 123% and 278%,respectively.The possible contributions for the synergetic effects were the electrochemically regeneration of ferric ion and the role of the oxygen that formed on the anode.

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Highly Efficient Photosensitization of Mesoporous TiO₂ Electrode with a Cyanine Dye

Yan Jie REN, Fan Shun MENG, He TIAN, Sheng Min CAI

中国化学快报. 2002, 13(04): 379-380.

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可视化

A low cost cyanine dye,1,1-dimethyl-3-ethyl-2-[3-(1,3-dihydro-3,3-dimethyl-1-ethyl-5-carboxyl-2H-indol-2-ylidene)-1-propenyl]-1H-benz[e] indolium iodide (1) was synthesized and applied to sensitize mesoporous TiO₂ electrode.Photoresponse of the electrode was extended to the visible and remarkably high incident photon-to-current conversion efficiency (IPCE) over 70% was achieved from 500 nm to 600 nm.

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Carbon Nanotubes Grown on Sepiolite as Catalyst Carrier

Ji Peng CHENG, Jiang Ping TU, Ying YE, Yan Lin SUN, Fu LIU, Yue Sheng NING, Fan Zhi KONG, Huan Ming LU, Xiao Bin ZHANG

中国化学快报. 2002, 13(04): 381-384.

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可视化

Multi-walled carbon nanotubes were synthesized by the catalytic decomposition of acetylene at 750℃ over sepiolite powder,which was treated with aqueous cobalt nitrate.It is expected that the composite with high specific area will have high capacity of hydrogen storage.

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Synthesis of Nanosized NaY Zeolite by Confined Space Method

Bo WANG, Hong Zhu MA, Qi Zhen SHI

中国化学快报. 2002, 13(04): 385-388.

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可视化

Nanosized NaY crystals have been prepared from metakaolin and sodium silicate by confined space synthesis with starch additive.It is found that the product has a narrow crystal size distribution (50-100 nm),high Si/Al ratio (Si/Al=4.6-6.1),high surface area (1090 m²/g) and the average diameter of nanosized NaY (75 nm) synthesized is 30 nm,it is smaller than that of without starch additive.

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Synthesis of NiFe₂O₄ Powders Well Defined in Size and Morphologies

Yu Ting ZHAO, De Hong CHEN, Dai Rong CHEN, Xiu Ling JIAO

中国化学快报. 2002, 13(04): 389-392.

摘要 ( )

可视化

The uniform NiFe₂O₄ powders with different particle size and morphologies (octahedral,cubic and spherical) have been prepared from different precursors via hydrothermal process.The nanocrystallines derived from precursor B in the weak alkali solution (pH≤10) are superparamagnetic.

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2002年, 第13卷, 第04期　刊出日期：2002-04-20

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2002年, 第13卷, 第04期 刊出日期：2002-04-20

2002年, 第13卷, 第04期　刊出日期：2002-04-20