中国化学快报

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Energy-transfer Process Accelerated by the Formation of Electrostatically Stabilized Aggregate (ESAg)

Xi Kui JIANG, Jian She WANG, Ji Liang SHI

中国化学快报. 2001, 12(10): 847-850.

摘要 ( )

可视化

The energy-transfer process between sodium ω-[2-(αt-naphthyl)ethoxy]undecanoate (FP^-*) and sodium o-9-anthrylmethyl glutarate (AFP^-) is accelerated by the formation of ESAg when cetyltrimethylammonium chloride (S16⁺) has been added to the solvent system of FP^-* and AFP^-. This result is yet another evidence for the formation of ESAg.

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Spectral and Mechanistic Studies of the Reactions of Substituted 1,5-Benzothiazepine with Dichloroacetyl Chloride and Triethylamine

Xin ZHOU, Shrong Shi LIN, Jin Fang YUAN, Zhe Ming WANG, Hong Zhong WANG

中国化学快报. 2001, 12(10): 851-854.

摘要 ( )

可视化

A [2+2] cycloaddition adduct 2 and a novel ring-opening product 3 were obtained from the reactions of 2,3-benzothiazepines 1 with dichloroacetyl chloride and triethylamine. The relative ratios of 2 and 3 were affected by the addition order of reactants and reaction temperature. The structures were determined by spectral data and the reaction mechanisms for the formation of 2 and 3 were elucidated.

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Unexpected Stereospecific Rearrangement-Addition Reaction of Trisubstituted Gibberellin Epoxides with Trimethylaluminium

An Qi CHEN, Christine L. WILLIS

中国化学快报. 2001, 12(10): 855-858.

摘要 ( )

可视化

A novel rearrangement-addition reaction of trisubstituted gibberellin epoxides with trimethylaluminium is reported. The reaction proceeds stereospecifically to give tertiary methyl alcohols. The possible mechanism for the reaction is also discussed.

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InCl₃·4H₂O Catalyzed Aldol Condensation of Cycloalkanones with Aromatic Aldehydes

Gui Sheng DENG, Tie Gang REN

中国化学快报. 2001, 12(10): 859-860.

摘要 ( )

可视化

InCl₃·4H₂O catalyzes the cross-aldol condensation of cycloalkanones with aromatic aldehydes in sealed tube under solvent free condition to afford an efficient method for the synthesis of α, α-bis (substituted) benzylidenecycloalkanones.

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Arylation of Acrylamide and Acrylonitrile with Arenediazonium Salts Catalyzed by Palladium Acetate

Ming Zhong CAI, Rong Hua HU, Jun ZHOU

中国化学快报. 2001, 12(10): 861-864.

摘要 ( )

可视化

Arylation of acrylamide and acrylonitrile were carried out with various arenediazonium tetrafluoroborates in the presence of a catalytic amount of Pd(OAc)₂ in ethanol and a variety of substituted (E)-cinnamamides and (E)-cinnamonitriles were obtained in high yields under mild reaction conditions.

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Stepwise Oxidation of Ketene Dithioacetal

Kai CHEN, Hua Zheng YANG

中国化学快报. 2001, 12(10): 865-868.

摘要 ( )

可视化

Stepwise oxidation of ketene dithioacetal is found and the different oxidation products changed with the amount of oxidant, temperature and reaction time.

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Soluble Polymer Supported (Diacetoxy)iodobenzene in Synthesis

Min XIA, Yan Guang WANG

中国化学快报. 2001, 12(10): 869-872.

摘要 ( )

可视化

Polyethylene glycol (PEG) supported (diacetoxy)iodobenzene as soluble polymer reagent can smoothly oxidize acid hydrazides into corresponding dimmers in good yields under very mild conditions.

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A Convenient Synthesis of Diacyl Selenides by Selenium Transfer Reaction of Primary Selenoamides

Hua Rong ZHAO, Xin Jian ZHAO, Xian HUANG

中国化学快报. 2001, 12(10): 873-874.

摘要 ( )

可视化

As a selenium transfer reagent, arylselenoamides react with acyl chlorides in chloroform to give diacyl selenides conveniently in good yield.

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A Novel Synthesis of Difloxacin Hydrochloride

Li Yan DAI, Ying Qi CHEN

中国化学快报. 2001, 12(10): 875-876.

摘要 ( )

可视化

Difloxacin hydrochloride, one of aryl-fluoro quinolone antibiotic, has been synthesized in seven steps from 2, 4-dichloro-5-fluoroacetophenone via oxalylation, ethoxymethylenation,amination, cyclization, hydrolysis, decarbonylation and N-methylpiperazination. Additional four new intermediates are produced.

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Synthesis of 5,7-Dimethyl-2-(5-Substituted-l,3,4-Oxadiazole-2-yl)-Methylenethio-1,2,4-Triazolo[1,5-a]Pyrimidines as Potential Fungicides

Guang Fu YANG, Zu Ming LIU, Xiang Hua QING

中国化学快报. 2001, 12(10): 877-880.

摘要 ( )

可视化

A series of diheterocyclic compounds containing 1,2,4-triazolo [l,5-a]pyrimidine and 1,3,4-oxadiazole were designed and synthesized starting from 2-mercapto-5,7-dimethyl-l,2,4-triazolo [ 1,5-a] pyrimidine. The structure of all compounds prepared were confirmed by H NMR spectroscopy and elemental analysis. The preliminary bioassay indicated that the title compounds displayed good fungicidal activity against Rhizoctonia solani.

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First Asymmetry Synthesis and Stereochemistry of Glutinone

Zhe ZHANG, Zhao Ming XIONG, Yu Kun GUAN, Guo Jun ZHENG, Yu Lin LI

中国化学快报. 2001, 12(10): 881-882.

摘要 ( )

可视化

The first asymmetry synthesis of glutinone and its three diastereoisomers were carried out in 8 steps and the stereochemistry of this natural product was given out.

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Total Synthesis of (±)-Nocardione A and (±)-Nocardione B,Two Cdc25B Tyrosine Phosphatase Inhibitors

Hai YANG, Wei LU, Jian Xiong BAO, Haji Aker AISA, Jun Chao CAI

中国化学快报. 2001, 12(10): 883-886.

摘要 ( )

可视化

Two new naphthoquinones, nocardione A and B isolated from strain P-A0248, were synthesized from naphtho[1,2-b]furan 1. The furan 1 was prepared from 5-methoxyl-1-naphthol.

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Design and Solid-Phase Synthesis of Multiple Muramyl Dipeptide (MMD)

Shuo De ZHANG, Gang LIU, Su Quan XIA

中国化学快报. 2001, 12(10): 887-888.

摘要 ( )

可视化

As a non-specific modulator of macrophage, multiplied muramyl dipeptide (MMD) is solid-phase synthesized by application of standard Fmoc chemistry strategy. Tam's multiple antigen system (MAS) is used as our four branched-linker on Lysine.

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The Synthesis of N-Morphine Hapten and Production of Monoclonal Antibody

Neng Dong WANG, Liu Min CHEN, Sheng JIN, Xiu ZHANG, Jia Hua CHEN

中国化学快报. 2001, 12(10): 889-890.

摘要 ( )

可视化

Those antibodies elicited by different tether site for attachment to carrier protein have different specificity. Herein we reported that a monoclonal antibody against morphine with high specificity and affinity was successfully produced by using different linkers to couple to different carrier proteins.

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Synthesis of Crown Ether-tethered β-Cyclodextrin and Fabrication of Its Self-assembled Monolayer on Gold Surface

Yu LIU, Shi Zhao KANG, Chun Hua DIAO

中国化学快报. 2001, 12(10): 891-892.

摘要 ( )

可视化

A novel β-cyclodextrin derivative 6 bearing a crown ether moiety has been synthesized by a convenient method in 9.4% yield. Its self-assembled monolayer (SAM) was fabricated on the gold surface, which was characterized by using surface-enhanced Raman spectra.

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Resveratrol Tetramers from the Roots of Ampelopsis sinica

Na LI, Xin LIU, Mao LIN

中国化学快报. 2001, 12(10): 893-896.

摘要 ( )

可视化

A new resveratrol tetramer, sinicin A was isolated from the roots of Ampelopsis sinica,with four known tetramers: vitisin A, cis-vitisin B, ampelopsin H and hopeaphenol. The structure and stereochemistry of sinicin A have been established on the basis of 1D and 2D NMR spectroscopic techniques.

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A New 6,7-Seco-Ent-Kaurane Diterpenoid from Isodon eriocalyx Var. laxiflora

Xue Mei NIU, Sheng Hong LI, Shuang Xi MEI, Zhong Wen LIN, Han Dong SUN

中国化学快报. 2001, 12(10): 897-898.

摘要 ( )

可视化

A new 6,7-seco-ent-kaurane diterpenoid, together with two known ones, was isolated from the leaves of Isodon eriocalyx var. laxiflora C. Y. Wu & H. W. Li. Their structures were established by spectroscopic methods.

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Peduncin, A New Indole Alkaloid from Pueraria peduncualris

Na LI, Qi Tai ZHENG, Zhi Da MIN

中国化学快报. 2001, 12(10): 899-902.

摘要 ( )

可视化

A new indole alkaloid, peduncin was isolated from the roots of Pueraria peduncularis.Its structure was established as 1 by NMR spectroscopic and X-ray crystallographic analysis.

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Isolation and Structure Elucidation of Autolytimycin, A New Compound Produced by Streptomyces Autolyticus JX-47

Ming Gang LI, Shao Hua WU, Li Xing ZHAO, Qi ZHANG, Wen Jun LI, Xiao Long CUI, Li Hua XU, Da Gang WU, Cheng Lin JIANG

中国化学快报. 2001, 12(10): 903-906.

摘要 ( )

可视化

Autolytimycin 1 was isolated from the culture filtrate of Streptomyces autolyticus JX-47,together with two known compounds, lebstatin 2 and 17-O-demethyl-geldanamycin 3. These compounds showed the activities of anti-HSV-I. The structure of 1 was determined by spectral analysis.

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A Chiral Phosphorous Derivatizing Agent for the Determination of the Enantiomeric Excess of Chiral Alcohols, Amines by ³¹p NMR

Kang Ying LI, Zheng Hong ZHOU, Chi Hung YEUNG, Chu Chi TANG

中国化学快报. 2001, 12(10): 907-908.

摘要 ( )

可视化

A chiral phosphorous derivatizing agent prepared from PCl₃ and (S)-BINOL was described. It is used to determine the enantiomeric excess of chiral alcohols and amines by ³¹p NMR.

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Retention Behaviors of Uronic Acid-containing Polysaccharides and Neutral Polysaccharides in HPGPC

Cui Ping LIU, Xing Feng BAO, Ji Nian FANG

中国化学快报. 2001, 12(10): 909-912.

摘要 ( )

可视化

The chromatographic behaviors of several uronic acid-containing polysaccharides and neutral polysaccharides were investigated in HPGPC for the first time. The effects of sample concentration and ionic strength of mobile phase on retention time were studied. The mechanism for the effects on Mw determination results of polysaccharides by HPGPC was also discussed.

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“Initial Potential” Effect on the Dissociative Adsorption of Methanol on A Roughened Platinum Electrode in Acidic Solution

Ze Lin LI, Bin REN, Chun Xing SHE, Xiao Ming XIAO, Zhong Qun TIAN

中国化学快报. 2001, 12(10): 913-916.

摘要 ( )

可视化

In situ Raman spectroscopic and voltammetric studies indicate that dissociative adsorption of methanol on the rough platinum electrode occurs in the hydrogen ad/desorption potential range, and the dissociative extent depends on the initial potential of the electrode before contacting methanol, in addition to the contacting time. As the dissociative product, carbon monoxide competes the site of strongly bound hydrogen preferentially, and shifts the ad/desorption potentials of weakly bound hydrogen towards more positive ones gradually with the increase of CO coverage. Whereas, formaldehyde dissociates more easily by far and completely suppresses H-adsorption. The confocal Raman spectroscopy developed on transition metals shows some intriguing advantages in investigating electrocatalytic oxidation of small organic molecules.

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The PVT Properties Calculation of Water by BWR Equation

Shou Gang WANG, Bu Xing HAN, Hong Wei XIANG

中国化学快报. 2001, 12(10): 917-920.

摘要 ( )

可视化

A series of thermodynamic functions are applied to generalize the Benedict-Webb-Rubin equation. The method has been successfully applied to this equation, which reduced the constants of BWR equation from eight to one. The calculation of PVT behavior of water over the entire thermodynamic surface is successful with satisfactory deviation.

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Red Electroluminescence and Photoluminescence from Novel Binuclear Europium Complex with Squaric Acid Ligand

Wei Guo ZHU, Xiao Qiang WEI, Mei Xiang ZHU, Zhi Yun LU, Bo LIANG, Ming Gui XIE, De Qiang ZHANG, Yong QIU

中国化学快报. 2001, 12(10): 921-924.

摘要 ( )

可视化

A novel binuclear europium β-diketone complex with squaric acid ligand was synthesized for the first time. Its structure was elucidated by IR, UV, and Elemental Analysis.Red light emitting diode (LED) was fabricated by using the novel europium complex as an emitting layer, tris(8-quinolinolate) aluminum (Ⅲ) (Alq₃) as an electron-transporting layer, N,N'-diphenyl-N, N'-(3-methylphenyl)-l,l'-biphenyl-4,4'-diamine (TPD) as a hole-transporting layer.A cell structure of indium-tin-oxide/TPD/Eu-complex/Alq₃/Mg: Ag was employed. Red electroluminescence was observed at room temperature with dc bias voltage of 2 V in this cell.Red emission peaks at about 613 nm with maximum luminance of over 106 cd/m². Compared with the EL luminance from those europium complexes reported before, one from the Eu-complex is best in the same cells.

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The Stability Constants of Complexes of BDBPH-Metals and Species Distributions

Guo Qiang SHANGGUAN, Jun ZHU, Ke Ying WANG, Arthur E. MARTELL

中国化学快报. 2001, 12(10): 925-928.

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可视化

The stability constants of the mononuclear complexes of BDBPH-Zn(II), Cd(Ⅱ) and Mn (Ⅱ) were determined by the potentiometric equilibrium measurements, and species distributions were also discussed. The metal ions do not combine with the ligand until the first two protons of the ligand have almost been completely neutralized. The main species were mononuclear complexes with the diprotonated ligand, MH₂L. The three metal ions also form mono- and noprotonated (fully deprotonated) complexes, MHL, ML. The relative order of stabilities of the mononuclear complexes, ML, is Zn(Ⅱ) > Cd(Ⅱ) > Mn(Ⅱ). The ligand has strong tendency to form mononuclear complexes with Zn(Ⅱ), Cd(Ⅱ) and Mn(Ⅱ), and it can also form dinuclear complexes at high pH.

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A Novel Electrocatalysis Method for Organic Pollutants Degradation

Ming Hua ZHOU, Zu Cheng WU, Da Hui WANG

中国化学快报. 2001, 12(10): 929-932.

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可视化

A novel electrocatalysis, ferrous ion catalyzed anodic-cathodic electrocatalysis (FACEC), was developed for organic pollutants degradation, which could promote the degradation by achieving synergetic effects of both anodic oxidation and cathodic indirect oxidation. The degradation rate of model pollutants - phenol by FACEC could increase by nearly 30% comparing with that of anodic electrocatalysis, and the current efficiency could reach 67%.

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Surface Modification of Nanometer Silica by N, N'-dicyclohexyl-carbodiimide Mediated Amidation

Zhao Xia GUO, Jie YU, Jian YU

中国化学快报. 2001, 12(10): 933-934.

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可视化

A potentially versatile procedure for surface modification of nanometer silica is illustrated by N, N'-dicyclohexylcarbodiimide (DCC) mediated amidation of stearic acid.

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Polynaphthoxazines-Montmorillonite Nanocomposites:Synthesis and Characterization

Chun Yang WANG, Tong ZHAO

中国化学快报. 2001, 12(10): 935-936.

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可视化

Polynaphthoxazines-clay nanocomposites were prepared from 1, 5-dihydroxynaphthalene, aniline, formaldehyde and different proportion montmorillonite(MMT) by in-situ reaction in ethanol. Dynamic TGA showed that nanocomposites have delayed decomposition temperatures when compared with pristine polynaphthoxazine indicating the enhancement in the thermal stability.

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Hydrogen Permeation Properties of Perovskite-type BaCe_0.9Mn_0.1O_3-δ Dense Ceramic Membrane

Guang Tao LI, Guo Xing XIONG, Shi Shan SHENG, Wei Shen YANG

中国化学快报. 2001, 12(10): 937-940.

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可视化

The electrical conduction properties of dense BaCe_0.9Mn_0.1O_3-δ (BCM10) membrane were investigated in the temperature range of 600-900℃. High ionic and electronic conductivities at elevated temperatures make BCM10 a potential ceramic material for hydrogen separation. Hydrogen permeation through BCM10 membranes was studied using a hightemperature permeation cell. Little hydrogen could be detected at the sweep side. However,appreciable hydrogen can permeate through BCM10 membrane coated with porous platinum black,which shows that the process of hydrogen permeation through BCM10 membranes was controlled by the catalytic decomposition and recomposition of hydrogen on the surfaces of BCM10 membranes.

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2001年, 第12卷, 第10期　刊出日期：2001-10-20

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2001年, 第12卷, 第10期 刊出日期：2001-10-20

2001年, 第12卷, 第10期　刊出日期：2001-10-20