中国化学快报

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Synthesis of Schiff Base Calix[4]arene Crowns

Xiao Bing WAN, Chuan Ming JIN, Xun GUO, Guo Yuan LU

中国化学快报. 2002, 13(08): 699-700.

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This letter reports the synthesis of Schiff base calix[4]arene crowns containing m-xylylene phenol subunit, in which calix[4]arene Schiff base crowns 2a, 2b and 2c were formed by 1:1 condensation of calix[4]arene diamine 1 with dialdehydes (2, 6-diformyl-4-chlorophenol 3a, 2, 6-diformyl-4-methylphenol 3b, 2, 6-diformyl-4-tert-butylphenol 3c) under high dilute condition in refluxing anhydrous ethanol in 65-70% yield.

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Construction of the Skeleton of Phthalascidin, Mechanism of the Formation of the Key Tricyclic Lactam Intermediate

Zhan Zhu LIU, Ye WANG, Shi Zhi CHEN

中国化学快报. 2002, 13(08): 701-704.

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The mechanism of the formation of a key tricyclic lactam intermediate 3 was studied. It was found that the E-form compound 3 was transformed from the Z-form compound 4. The formation of 4 was a kinetically controlled process while the formation of 3 was a thermodynamically favorable one. A possible mechanism was given in this paper.

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Soluble Polymer-supported Synthesis of Indoles via Palladium-mediat-ed Heteroannulation of Terminal Alkynes with o-Iodoanilines

Xu Feng LIN, Cheng MA, Ye Wei YANG, Yan Guang WANG

中国化学快报. 2002, 13(08): 705-707.

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A soluble polymer-supported synthesis of indoles via palladium-mediated hetero-annulation of terminal alkynes with o-iodoanilines has been described. The protocol provides a useful tool for constructing combinatorial indole libraries.

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First Synthesis of 2α-Thiol Ether Analog of Docetaxel

Wei Shuo FANG, Ying LIU, Qi Cheng FANG

中国化学快报. 2002, 13(08): 708-710.

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A 2α-phenylthio ether analog 1c of docetaxel was synthesized for the first time from 10-deacetylbaccatin Ⅲ 3 via double inversion of C-2 configuration. This compound showed very weak cytotoxicity toward several tumor cell lines.

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Methane Coupling Using Hydrogen Plasma and Pt/γ-Al₂O₃ Catalyst

Bin DAI, Wei Min GONG, Xiu Ling ZHANG, Ren HE

中国化学快报. 2002, 13(08): 711-713.

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In this paper, methane coupling at ambient temperature, under atmospheric pressure and in the presence of hydrogen was firstly investigated by using pulse corona plasma and Pt/γ-Al₂O₃ catalyst. Experimental results showed that Pt/γ-Al₂O₃ catalyst has catalytic activity for methane coupling to C₂H₄. Over sixty percent of outcomes of C₂ hydrocarbons were detected to be ethylene.

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Total Synthesis of (±)-Inophyllum B

Qi GAO, Lin WANG, Xiao Tian LIANG

中国化学快报. 2002, 13(08): 714-716.

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(±)-Inophyllum B has been synthesized for the first time by a five-step approach from phloroglucinol, including the Pechmann reaction, Friedel-Crafts acylation, cyclization, chromenylation and Luche reduction

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One-pot Synthesis of 1-Aryloxyacety l-4-(4'-nitrophenyloxyacetyl)-thiosemicarbazides under Phase Transfer Catalysis and Microwave Irradiation

Zheng LI, Xi Cun WANG

中国化学快报. 2002, 13(08): 717-720.

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The 1-aryloxyacetyl-4-(4'-nitrophenyloxyacetyl)-thiosemicarbazides (3a-h) are synthe-sized via reaction of 4-nitrophenyloxyacetyl chloride with ammonium thiocyanate and aryloxyacetic hydrazides (2a-h) under phase transfer catalysis and microwave irradiation in excellent yield.

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Diastereoselective α-Alkylation of β-Amino Esters:Preparation of Novel α-Substituted β-Amino Esters from α-Amino Acids

Zhi Hua MA, Cong LIU, Yong Hua ZHAO, Wei LI, Jian Bo WANG

中国化学快报. 2002, 13(08): 721-724.

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Enantiomerically pure α-substituted β-amino esters were prepared from natural L-α-amino acids through Arndt-Eistert homologation and diastereoselective α-alkylation.

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The Inorganic-free Organic Conductor α'-(ET)₂C₆H₄(SO₃)₂:Its Synthesis, Structure, and Conductivity

Zhi LIU, Qi FANG, Wen Tao YU, Guo Qun LIU, Wen XU, Min Hua JIANG, Bin ZHANG, Dao Ben ZHU

中国化学快报. 2002, 13(08): 725-728.

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A new ET based cation radical salt, α'-(ET)₂C₆H₄(SO₃)₂ (ET=bis(ethylenedithio) tetrathiafulvalene) has been synthesized by oxidative electro-crystallization and the crystal structure determined to be in monoclinic system, P2/n space group. Its resistivity-temperature curve shows a semi-conductive behavior with a discontinuation at about 150K.

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A Facile Synthesis of 3,5-Diaryl 1,2,4-Selenadiazoles from Aryl Selenoamides

Hua Rong ZHAO, Qing Sen YU

中国化学快报. 2002, 13(08): 729-730.

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A facile synthesis of 3,5-diaryl 1,2,4-selenadiazoles was provided by treatment of aryl selenoamides with p-methylphenyl sulfonyl chloride in chloroform.

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A New 10-Hydroxyl Anthrone Glycoside from Cassia siamea Lam.

Tai Sheng LÜ, Yang Hua YI, Zhi Guo ZHANG, Zhao Qin ZHANG, Nan HUA

中国化学快报. 2002, 13(08): 731-733.

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A new 10-hydroxyl anthrone glycoside, 1, 8, 10-trihydroxyl-1-O-β-D-glucopyrano-syl-3-methyl-10-C (S)-β-D-glucopyranosyl-anthrone-9 1 was isolated from the stem of Cassia siamea Lam. The structure was elucidated by spectral evidences, especially by 2 D techniques.

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A New Highly Oxygenated Eremophilenolide from Ligulariopsis shichuana

Wen Shu WANG, Kun GAO, Zhong Jian JIA

中国化学快报. 2002, 13(08): 734-735.

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a new highly oxygenated eremophilenolide was isolated from Ligulariopsis shichuana. Its structure was elucidated by NMR spectroscopic and X-ray diffraction methods.

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A New Sesquiterpene Lactone of Notoseris henryi

Zhi Xin LIAO, Shu Lin PENG, Yao Zu CHEN, Li Sheng DING

中国化学快报. 2002, 13(08): 736-737.

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A new guaianolide, notoserolide E, along with nine known compounds was isolated from the Chinese endemic plant of Notoseris henryi (Dunn) Shih and its structure was elucidated by means of spectroscopic evidence.

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A New Chromone Derivative from Stellera chamaejasme L.

Bao Min FENG, Yue Hu PEI, Hui Ming HUA

中国化学快报. 2002, 13(08): 738-739.

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A new chromone derivative, 3-[1-(2,4,6-trihydroxyphenyl) 3-di-(4-hydroxyphenyl) 1-propanone-2-yl] 5,7-dihydroxy-8-di(4-hydroxyphenyl)methyl-4H-1-benzopyran-4-one, named as isomohsenone was isolated from the roots of Stellera chamaejasme L. together with known chamaechromone. Its structure was determined by the analysis of MS and NMR data, especially 2D NMR spectra.

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New Diterpenoids from Coleus forskohlii

Yun Heng SHEN, Chun Suo YAO, Yun Long XU

中国化学快报. 2002, 13(08): 740-743.

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Two new diterpenoids, forskolin G and H were isolated from the chloroform extract of the roots of Coleus forskohlii, and based on spectroscopic data, their structures were identified as 1α-hydroxy-6β,7β-diacetoxy-8,13-epoxylabd-14-ene-11-one (1), and 1α,6β-diacetoxy-8,13-epoxylabd-14-ene-11-one (2), respectively.

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Two Novel Myrinsol Diterpenes from Euphorbia prolifera

Wan Jin ZHANG, Dao Feng CHEN, Ai Jun HOU

中国化学快报. 2002, 13(08): 744-747.

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:Two novel diterpenes, Euphorprolitherin A (1) and Euphorprolitherin B (2), were isolated from the roots of Euphorbia prolifera. Their structures were elucidated on the basis of spectroscopic methods.

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Two New Chromone Glycosides from Selaginella uncinata

Ling Yun MA, Feng WEI, Shuang Cheng MA, Rui Chao LIN

中国化学快报. 2002, 13(08): 748-751.

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Two new chromone glycosides, 5-hydroxy-2,6,8-trimethylchromon-7-O-β-D-gluco-pyranoside, named uncinoside A; 5-acetoxy-2,6,8-trimethylchromone-7-O-β-D-glucopyranoside, named uncinoside B, and a known chromone compound named 8-methyl eugenitol were isolated from Selaginella uncinata. Their structures were elucidated by spectra analysis of FAB-MS, 1D NMR and 2D NMR including ¹H NMR, ¹³C NMR, HMQC, HMBC and single-crystal X-ray diffraction techniques.

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A New Sesquiterpene from Saussurea parviflora

Zhong Duo YANG, Shuo LI, Cheng Shan YUAN, Zhong Jian JIA

中国化学快报. 2002, 13(08): 752-753.

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A new sesquiterpene:11,12,13-trihydroxy-4(15),7(8)-eudesmdien-9-one was isolated from Saussurea parviflora. The structure was elucidated on the basis of spectral evidence.

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Enantiomeric Sesquiterpene Lactones from Senecio tsoongianus

Yu ZHAO, Peng WANG, Xiao Jiang HAO, Simon PARSONS, David W. H. RANKIN, Hao SHI, Hong YU, Thierry SEVÉNET, Françoise GUÉRITTE

中国化学快报. 2002, 13(08): 754-757.

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可视化

From Senecio tsoongianus, two pairs of enantiomeric isomers, tsoongianolides A (1) and B (2), tsoongianolides C (3) and D (4) were isolated. Their structures were elucidated by 1D and 2D-NMR techniques and X-ray diffractions. The cytotoxicity to KB cell of 1 and 2 is also reported.

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New Metabolites of Aconitine in Rabbit Urine

Hong Gui ZHANG, Xiang Guo SHI, Ying SUN, Ming Yu DUAN, Da Fang ZHONG

中国化学快报. 2002, 13(08): 758-760.

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可视化

A sensitive analytical method to identify and determine aconitine and its metabolites in rabbit urine was developed by liquid chromatography-electrospray ionization mass spectometry (LC/ESI-MSⁿ).In this method,aconitine and its four metabolites in rabbit urine were isolated and deduced as 16-O-demethylaconine (M1),benzoylaconine(M2),16-O-demethylbenzoylaconine (M3)and aconie(M4).M1 and M3 are new metabolites of aconitine and M2 and M4 are first identified in urine.

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Studies on the Electrochemical Characteristics of K₂FeO₄ Electrode

Wei Hua YANG, Jian Ming WANG, Zhi Bin ZHANG, Jian Qing ZHANG, Chu Nan CAO

中国化学快报. 2002, 13(08): 761-764.

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Discharge performance of K₂FeO₄ electrode under different conditions was studied by the constant electric current discharge method. The electrochemical characteristics of K₂FeO₄ electrode were investigated for the first time by means of cyclic voltammetry. The results show that the K₂FeO₄ electrode made at moderate pressure (20 MPa) and discharged at lower current has better discharge performance. It is also found that K₂FeO₄ electrode is significantly rechargeable.

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Nanosized SnO₂ Particles Dispersed on a Graphite Electrode for Selective Detection of Dopamine and Ascorbic Acid

Jun LIU, Zong Hua WANG, Yi Ming WANG, Guo An LUO, Han Wen SUN

中国化学快报. 2002, 13(08): 765-768.

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A novel nano-SnO₂/graphite electrode has been prepared via polishing procedure to produce active and stable surface. The modified electrode resolves the overlapping voltammetric response of dopamine and ascorbic acid into two well-defined peaks by 230 mV. The mechanism of discrimination of dopamine from ascorbic acid is discussed. Dopamine and ascorbic acid can be determined simultaneously with the modified electrode. The electrode shows good sensitivity, selectivity and stability.

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ESR Approach to the Nature of Solvation by Using s-Butyl n-Heptafluorobutyryl Nitroxide Probe

Jin Wen WANG, Yi Yuan PENG, Cheng Xue ZHAO

中国化学快报. 2002, 13(08): 769-772.

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Stable s-butyl n-heptafluorobutyryl nitroxide 3 has been generated in an electron-transfer reaction in F113 (CFCl₂CF₂Cl) solution at r.t. The a_N values for 3 in 11 aprotic solvents show a linear correlation with cybotactic solvent parameters E_T and Z. The physical significance for slopes, slope×E_T or slope×Z, and the extrapolated intercepts on the a_N axis are well established. The plots of a_N versus noncybotactic solvent parameters, such as dipolar moment and dielectric constant, are badly behaved.

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A Peptide-mediated Fenton Reaction in Wood-degrading Fungi

Wei WANG, Jun Cheng LIU, Pei Ji GAO

中国化学快报. 2002, 13(08): 773-776.

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Gt factor is a low-molecular-weight peptide isolated from the extracellular culture of wood-degrading fungus Gloeophyllum trabeum. It is capable of enhancing degradation of cellulose. Its action mechanism was investigated and it was found that Gt factor could reduce Fe³⁺ to Fe²⁺. Electron paramagnetic resonance (EPR) spectroscopy revealed in the presence of O₂, Gt factor could drive the formation of H₂O₂ via a superoxide anion O₂^.- intermediate and mediate the generation of hydroxyl radical HO^· in a Fenton-type reaction. All these provided evidence for the formation of HO^· in some wood-degrading fungi.

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Synthesis, Crystal Structure and Fluorescent Property of d-f Heterodinuclear Eu(III)-M(II) (M=Cd(II), Ni(II)) Cryptates.

Qiu Yun CHEN, Qin Hua LUO, Zhi Lin WANG, Jiu Tong CHEN

中国化学快报. 2002, 13(08): 777-780.

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This communication reports the reports the synthesis, crystal structure and the fluorescent property of cryptates[EuML(DMF)](ClO₄)₂ (M=Cd,Ni).

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Studies on the Synthesis and the Structure of Ferric Aluminum Magnesium Hydrotalcite-like Compounds

Shu Ping LI, Wan Guo HOU, Peng JIANG, Wei Qun ZHU

中国化学快报. 2002, 13(08): 781-782.

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The particles of ferric aluminum magnesium hydrotalcite-like compounds (Fe-Al-Mg_HTlc) were synthesized by co-precipitation method. It was found that when n(Fe)/n(Al+Mg+Fe)<0.30 and n(Al)/n(Al+Mg+Fe)<0.30, pure HTlc can be formed; when the molar ratio of Al/(Fe+Al+Mg)>0.30, Al(OH)₃ will emerge; when the molar ratio of Fe/(Fe+Al+Mg)>0.30, the amorphous composition will appear. Hence Fe³⁺ and Al³⁺ have no concentration superposition effect on the crystal structure of the samples.

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Adsorption Behavior for CO on Modified MCM-41 with Zn and CuCl

Nong Yue HE, Qi Hong SHI, Fei GAO, Yi Bing SONG, Yang YU, Hui Lin WAN

中国化学快报. 2002, 13(08): 783-786.

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The Zn-Cu(Ⅰ)/HMCM-41 catalysts were successfully prepared in laboratory scale by solid-state ion exchange with CuCl salt, together with introduction of Zn to improve the dispersion degree of the active component Cu(Ⅰ) on the surface. With increase of the amounts of Zn and CuCl from 0% to 9.0% and 25.0% respectively, CO adsorption the amounts of increased from 10.6 μmol/g to 183.0 μmol/g correspondingly. The in situ FT-IR spectra for CO adsorption demonstrated that there existed two dynamic equilibriums between surface carbonyl complexes:Cu(CO)₃⇔Cu(CO)₂⁺+CO and Cu(CO)₂⁺⇔Cu(CO)⁺+CO. The equilibriums can be shifted reversibly by changing the temperature and pressure. Due to the modified MCM-41 mesoporous materials possess both of the acidic and metallic carbonyl centers, this kind of material can be developed into mesoporous bifunctional catalysts for carbonylation reactions, in which larger molecules are involved.

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Secondary Activation of Commercial Activated Carbon and its Application in Electric Double Layer Capacitor

Hui YANG, Jia Hong ZHOU, Ya Wen TANG, Tian Hong LU, Masaki YOSHIO

中国化学快报. 2002, 13(08): 787-790.

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The cheap commercial activated carbon (AC) was improved through the secondary activation under steam in the presence of FeCl₂ catalyst in the temperature range of 800-950℃ and its application in electric double layer capacitors (EDLCs) with organic electrolyte was studied. The re-activation of AC results in the increases in both specific capacitance and high rate capability of EDLCs. For AC treated under optimized conditions, its discharge specific capacitance increases up to 55.65 F/g, an increase of about 33% as compared to the original AC, and the high rate capability was increased significantly. The good performances of EDLC with improved AC were correlated to the increasing mesoporous ratio.

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MEDV-13 for QSRR of 62 Polychlorinated Naphthalenes

Shu Shen LIU, Chun Sheng YIN, Lian Sheng WANG

中国化学快报. 2002, 13(08): 791-794.

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可视化

A molecular electronegativity distance vector based on 13 atomic types (MEDV-13) is used to describe the structures of 62 polychlorinated naphthalene (PCN) congeners and related to the gas chromatographic relative retention indices (RIs) of PCNs. Using multiple linear regression, a 4-variable quantitative structure(retention relationship (QSRR) with the correlation coefficient of estimations (r) being 0.9912 and the root mean square error of estimations (RMSEE) being 31.4 and the correlation coefficient of predictions (q) and the root mean square error of predictions (RMSEP) in the leave-one-out procedure are 0.9898 and 33.76, respectively.

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A Solid Ag Film Deposited from Solution on Self-assembled Mercaptopropyltrimethoxysilane (MPTS) Monolayer

Nong Yue HE, Zheng Chun LIU, Peng Feng XIAO, Quan Guo HE, Zu Hong LU

中国化学快报. 2002, 13(08): 795-798.

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可视化

Mercaptopropyltrimethoxysilane (MPTS) bearing mercapto groups was used to form self-assembly monolayers (SAMs) on glass substrates by solution extraction. SEM, XRD and rubbing test analysis illustrated that the Ag film on the SAMs-modified glass was more durable than that on the commonly-modified glass and that the crystallinity of Ag film on the SAMs-modified glass was identical with those of the Ag film on the commonly-modified glass and pure Ag.

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A New Application of Carbon Nanotubes Constructing Biosensor

Huai Guo XUE, Wei Lin SUN, Bing Jing HE, Zhi Quan SHEN

中国化学快报. 2002, 13(08): 799-800.

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可视化

Carbon nanotubes used for constructing biosensor was described for the first time. Single-wall carbon nanotubes (SWNTs) functionalized with carboxylic acid groups were used to immobilize glucose oxidase forming a glucose biosensor. The biosensor response can be determined by amperometric method at a low applied potential (0.40 V).

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Preintercalation of Layered γ-Zirconium Phosphate for Preparation of Immobilized Hemoglobin

Li Na GENG, Na LI, Xiao Fan WEN, Nan DAI, Feng Lin ZHAO, Ke An LI

中国化学快报. 2002, 13(08): 801-804.

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可视化

Layered γ-Zirconium phosphate (γ-ZrP) preintercalated with butylamine, tetra (n-butylammonium) hydroxide, dimethylamine respectively, or only ultrasonificated, for preparation of immobilized hemoglobin were investigated in this report.

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Theoretical Studies of the Reaction Mechanisms of CH₃S+NO₂

Shao Kun WANG, Qing Zhu ZHANG, Jian Hua ZHOU, Yue Shu GU

中国化学快报. 2002, 13(08): 805-808.

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可视化

The potential energy surface for the CH₃S+NO₂ reaction has been studied using the ab initio G3 (MP2) method. A variety of possible complexes and saddle points along the minimum energy reaction paths have been characterized at UMP2 (full)/6-31G(d) level. The calculations reveal dominating reaction mechanisms of the title reaction:CH₃S+NO₂ firstly produce intermediate CH₃SONO, then break up into CH₃SO+NO. The results are valuable to understand the atmospheric sulfur compounds oxidation mechanism.

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2002年, 第13卷, 第08期　刊出日期：2002-08-20

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2002年, 第13卷, 第08期 刊出日期：2002-08-20

2002年, 第13卷, 第08期　刊出日期：2002-08-20