中国化学快报

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An Efficient Cleavage of 1,3-Dioxolane Using ZnCl₂/THF/H₂O

Li Gong OU, Dong Lu BAI

中国化学快报. 2000, 11(02): 95-96.

摘要 ( )

可视化

A new, mild and efficient method for the cleavage of 1,3-dioxolane is reported.

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Photostimulated S_RN 1 Reactions of Benzyl Chloride with Carbazolyl Nitrogen Anion

Zhao ZHANG, Zhao Bin CHEN, Qin CHANG, Fu JIN

中国化学快报. 2000, 11(02): 97-98.

摘要 ( )

可视化

The photostimulated reactions of benzyl chloride with carbazolyl nitrogen anion in dimethyl sulfoxide gave 9-benzylcarbazole and 3-benzylcarbazole.The reactions are suggested in term of S_RN1 mechanism of nucleophilic substitution.

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Aqueous Diels-Alder Reactions of Cyclopentadiene with Symmetric Diester of Fumarate or Maleate

Guang Dian HAN, Zhao Yang MA, Guo Sen HE

中国化学快报. 2000, 11(02): 99-100.

摘要 ( )

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Symmetric diesters of cis-or trans-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylate were prepared by aqueous Diels-Alder reaction of cyclopentadiene with symmetric diester of fumarate or maleate.

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Selective Reduction of gem-Dichlorocyclopropane Derivatives

Zheng Ning LI, Zhuo ZHENG, Hui Lin CHEN

中国化学快报. 2000, 11(02): 101-102.

摘要 ( )

可视化

gem-Dichlorocyclopropanes were effectively reduced by lithium aluminum hydride, and monocylopropanes were obtained in good yields.

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Synthesis and Structural Characterization of a Polyphosphazeneas Photoconductive Material

Zhen LI, Cai Mao ZHAN, Jin Gui QIN

中国化学快报. 2000, 11(02): 103-104.

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可视化

The synthesis of a novel polyorganophosphazene that contains charge-transporting agent as side chains for photoconductive application is reported.Structural characterization for the high polymer was presented by ¹H-NMR, infrared spectrosocopy, gel permeation chromatography (GPC) .

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The 1:2 Complex of Piperazine with Some Phenols:Hydrogen Bonding Pattern Involved in Transition States in Solution

Zhi Min JIN, Yuan Jiang PAN, Si Hua SHANG, Duan Jun XU, Yuan Zhi XU

中国化学快报. 2000, 11(02): 105-106.

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A novel model for the 1:2 complex of piperazine with some phenols in solution is established and verified.In CDCl₃ solution, one piperazine molecule is tied to two phenol molecules by hydrogen bonds of O-H---N and N-H---O.And the protons of > NH and-OH groups exchange quickly and simultaneously between the atoms of phenol oxygen and piperazine nitrogen.

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Convenient, Efficient One-Pot Synthesis of Ferrocenylcyanide

Jun Long ZHANG, Chun E DONG, Yong Gang ZHI, Liang Fu ZHANG

中国化学快报. 2000, 11(02): 107-108.

摘要 ( )

可视化

Convenient, efficient one-pot synthesis of ferrocenylcyanide, which is a very important intermediate in synthesis of chiral ferrocenyl ligands in asymmetric catalysis, is described.The chemical yield is up to 60%.

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Synthesis of Z and E-(2',5'-dimethoxyphenyl)-methylene-butyrolactones

Yong Ying JIANG, Zhi Yun LIN, Li Ya ZHU

中国化学快报. 2000, 11(02): 109-110.

摘要 ( )

可视化

A pair of Z and E isomers of cyclization of γ-ketoacid 7,which was prepared in six steps from 2,5-dimethoxyphenyl acetic acid 1, gave a pair of Z(20%) and E (4%) isomers of (2,5-dimethoxyphenyl)-methylene-butyrolactones

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A Facile Synthesis of the C-11 isomer of 5-epi-Kudtriol

Gang ZHOU, Xiao Lei GAO, Zhe ZHANG, Yu Lin LI, Zhi Zhen SHANG, Ren An LIAO

中国化学快报. 2000, 11(02): 111-112.

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可视化

The C-11 isomer of natural trihydroxyl sesquiterpene 5-epi-kudtriol has been synthesized starting from (+)-dihydrocarvone via asymmetric dihydroxylation as a key step.

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First Total Synthesis of 4,5-Secoeudesmane-type and Iphionane-type Compounds-Synthesis of 4,5-Dioxo-seco-γ-eudesmol and 5β ,11-Dihydroxyiphionan-4-one

Zhao Ming XIONG, Gang ZHOU, Xiao Lei GAO, Yong Gang CHEN, Yu lin LI

中国化学快报. 2000, 11(02): 113-114.

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Molecular Design of Crown Ethers.191.Synthesis of Novel Disulfide-and Diselenide-Bridged Bis (benzo-12-crown-4)s and their Ag⁺ Selective Electrode Properties

Heng Yi ZHANG, Yu LIU

中国化学快报. 2000, 11(02): 115-118.

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可视化

Two novel heteroatom–bridged bis (benzo-12-crown-4 ether)s, i.e.bis [2-nitro-4,5-(1,4,7,10-tetraoxadecamethylene)phenyl] disulfide 1 and diselenide 2, have been synthesized.X-ray crystallographic structure was obtained for 1.Ion selective electrodes (ISE) for Ag⁺, containing 1 and 2 in PVC membrane as neutral carriers, were prepared, and their selectivity coefficients for Ag⁺ (k_ag.al^pot) were determined against other heavy metal ions, alkali and alkaline-earth metal ions, and ammonium ion.These ISEs showed excellent Ag⁺ selectivities, logk_ag.al^pot≤-3.8, against most of the interfering cations examined, except for Hg⁺.

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Theoretical Studies on CH₃SiH₃+H→CH₃SiH₂+H₂ Reaction with the Variational Transitional State Theory

Qing Zhu ZHANG, Chuan Pu LIU, Shao Kun WANG, Xin Ji XIE, Miao ZHANG, Yue She GU

中国化学快报. 2000, 11(02): 119-122.

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可视化

In this paper, the abstraction reaction of CH₃SiH₃ with H has been studied by using the "direct dynamics" method of variational transition-state theory, which is based on the information on geometries, frequencies and energies calculated by ab initio along the minimum energy path.The rate constants of the title reaction were calculated for the range of temperature 298-1700 K.The rate constants calculated match well with the experimental values.

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Coupling between Two NO Radicals Linked through Electron-Rich Rings

Hai Quan HU, Xian ZHAO, Da Cheng FENG, Cheng Bu LIU

中国化学快报. 2000, 11(02): 123-126.

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可视化

The characters of coupling between two doublet NO radicals linked through electron-rich rings have been studied.The results demonstrate that the molecules have triplet ground states, and ferromagnetic coupling exists in these molecules.

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Two New Indole Alkaloids from Evodia rutaecarpa

Guo Ying ZUO, Xiao Sheng YANG, Xiao Jiang HAO

中国化学快报. 2000, 11(02): 127-128.

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可视化

Two new indole alkaloids, wuchuyuamide I and II were isolated from the fruits of Evodia rutaecarpa (Juss.) Benth and their structures were elucidated on the basis of spectral data.

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Alkaloids from the Roots of Saccopetalum prolificum

Ming Lei WANG, Jiang DU, Ruo Yun CHEN, De Quan YU

中国化学快报. 2000, 11(02): 129-130.

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A new alkaloid, named prolifine (1), was isolated along with four known alkaloids, liriodenine (2), 6-hydroxyonychine (3), isooncodine (4) and discretamine (5) from the roots of Saccopetalum prolificum.The structure of 1 was elucidated on the basis of spectroscopic and chemical methods.

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Mahuangchiside, a New Flavone Glycoside from Chirita fimbrisepala

Li Dong ZHOU, Jing Guang YU, Jia GUO

中国化学快报. 2000, 11(02): 131-132.

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A new flavone glycoside, named mahuangchiside, was isolated from the root of Chirita fimbrisepala Hand.-Mazz.The structure was elucidated as 5,4’-dihydroxy-6-methoxy-flavone-7-O-β-D-xylopyranosyl(1→2)-β-D-xylopyranoside on the basis of spectral analysis (¹H-¹H COSY, ¹³C-¹H HETCOR and HMBC) and chemical evidence.

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A New Bislabdane-type Diterpenoid from Cunninghamia lanceolata

Jiang Da, Ming Lei WANG, Ruo Yun CHEN, De Quan YU

中国化学快报. 2000, 11(02): 133-134.

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A new bislabdane-type diterpenoid lanceolactin (1), was isolated from the roots of Cunninghamia lanceolata.Its structure was elucidated on the basis of spectroscopic methods, especially 2D-NMR techniques.

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A New Bianthraqinone Glycoside from Eremurus chinensis

Jian Gong SHI, Chong LI, Ying Peng ZHANG, Cheng Zhong ZHANG

中国化学快报. 2000, 11(02): 135-138.

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可视化

A new bianthraquinone glycoside, 8-O-β-D-glucopyranosyl-2,7'-bi(1,8-dihydroxy-3-methyl-9,10-anthraquinonyl) 1 was isolated from Eremurus chinensis Fedtch.Its structure was established by spectroscopic techniques including 2D-NMR and chemical methods.

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Two New Triterpenoid Saponins from the Seeds of Aesculus chinensis

Xiu Wei YANG, Jing ZHAO, Yu Xin CUI

中国化学快报. 2000, 11(02): 139-142.

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可视化

Two new triterpenoid saponins, named isoescins IIIa (1) and IIIb (2) were isolated from the seeds of Aesculus chinensis and identified by spectroscopic analysis and chemical hydrolysis.Their structures were established as 21b-tigloyl-28-acetylbarringtogenol C-3β-O-[b-D-galactopyranosyl (1→2)] [β-D-glucopyranosyl (1→4)]-β-D-glucopyranosiduronic acid (1) and 21β-angeloyl-28-acetylbarringtogenol C-3β-O-[β-D-galactopyranosyl (1→2)] [b-D-glucopyrano-syl (1→4)]-β-D-glucopyranosiduronic acid (2), which are geometrically isomeric.

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Two Triterpenoid Dimers from Rubus pungens Camb var.oldhamii

Bin Gui WANG, Wei Ming ZHU, Xiao Ming LI, Zhong Jian JIA, Xiao Jiang HAO

中国化学快报. 2000, 11(02): 143-146.

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可视化

Two new triterpenoid saponin dimers, named rubupungenoside A (1) and B (2), have been isolated from the aerial parts of Rubus pungens Camb.var.oldhamii.Their structures have been established on the basis of spectroscopic methods and chemical transformations.

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Evidence of DNA-Ligand Binding with Different Modes Studied by Spectroscopy

Xue Mei WANGI, Xian Lun JIANG, Zu Hong LU, Hong Yuan CHEN

中国化学快报. 2000, 11(02): 147-148.

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The binding behavior of several fluorescence dyes to calf thymus DNA has been studied by absorption, fluorescence and atomic force microscopy (AFM), which could provide direct evidence of formation modes and the corresponding nanostructural features of the ligand-DNA complexes.

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Electric Field-induced Conformational Transition of Bovine Serum Albumin from α-helix to β-sheet

Yong Chun ZHU, Guang Jin CHENG, Shao Jun DONG

中国化学快报. 2000, 11(02): 149-154.

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The irreversible conformational transition of bovine serum albumin (BSA) from α-helix to β-sheet, induced by electric field near the electrode surface, was monitored by circular dichroism (CD) with a long optical path thin layer cell (LOPTLC).

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Separation of chiral drugs with β-CD phosphate by capillary electrophoresis

Xue Qin REN, Xiao Dan SU, Al Jin HUANG, Yi Liang SUN, Zeng Pei SUNZ

中国化学快报. 2000, 11(02): 153-156.

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β-Cyclodextrin phosphate (β-CD-phosphate) was used as a selector for separating chiral drugs by capillary electrophoresis (CE).A solution comprising of 120 mmol/L Britton-Robinson buffer (BRB) containing 10 mmol/L β-CD phosphate with the pH adjusted to 7.0 was used as the background electrolyte (BGE), and a small amount of analyte was injected (600v/1s).Triethylamine, diethylamine, triethanolamine, diethanolamine, Tris added as modifier were compared.Isoprenaline, methoxamine, oxprenolol, practolol were successfully resolved.

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Determination of Kinetic Parameters and Metal Ions in Urea-Urease System Based on the Biochemical Reaction Heat Induced Laser Beam Deflection

Hong Tao YAN, Xiao Yun ZHU

中国化学快报. 2000, 11(02): 157-160.

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可视化

A new analytical method for the determination of urea-urease system based on biochemical reaction heat induced laser beam deflection is presented in this paper.With the method, the Michaelis constant (K_m) of urease and apparent inhibition constant (Ki) of some metal ion inhibitors were measured respectively.This method was also used for the quantitative determination of metal ions with satisfactory result.

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Multilayer Film Fabrication and Photoelectric Conversion Property of Two Pyrrolidinofullerene Carboxylic Acid Derivatives

Tian Xin WEI, Jin ZHAI, Liang Bing GAN, Chun Hui HUANG

中国化学快报. 2000, 11(02): 161-164.

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Two multilayer films of pyrrolidinofullerene carboxylic acid derivatives, which exhibit photoelectric conversion property, are reported here.The first monolayers were fabricated on hydrophilic indium-tin-oxide (ITO), quartz, and mica by esterification reaction.The multilayers were characterized by contact angle and UV spectrum.The photoelectric conversion properties of both multilayer films were studied.

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Modification of Nylon Membrane Used for Affinity Adsorption

Hong Yu GAN, Zhen Hua SHANG, Jun De WANG

中国化学快报. 2000, 11(02): 165-166.

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Nylon membrane was modified by binding with polyhydroxyl-containing materials to increase its hydrophilicity and reduce its nonspecific interaction with proteins.The effect of binding hydrophilic materials on amount of ligand bound--Cibacron Blue F3GA (CBF) was investigated.Experimental data showed that the amount of CBF bound can be increased significantly after binding of hydrophilic materials.

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Effect of Polymerization Temperature on Propylene Polymerization with C_s-symmetric Metallocene Catalyst

Zhi Qiang FAN, Tariq YASIN, Lin Xian FENG

中国化学快报. 2000, 11(02): 167-170.

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可视化

A novel highly active C_s-symmetric metallocene catalyst namely:meso-dimethylsilylbis (2,4,6-trimethyl-1-indenyl)zirconium dichloride is presented.The effect of polymerization temperature (0-70℃) on the catalyst performance for propylene polymerization has been investigated.This catalyst shows very high activity at 50℃ which is higher than the activity of the racemic analogue, and the resulted polypropylene is amorphous in nature with isotactic pentad content [mmmm] of 12 %.

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Preparation and Characterization of Layered Compound Zirconium Bis(monohydrogenphosphate) Intercalated with Rare Earth Complex

Lian She FU, Qing Hong XU, Hong Jie ZHANG, Lian Sheng LI, Jia Zuan NI, Ru Ren XU

中国化学快报. 2000, 11(02): 171-174.

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可视化

Layered compound zirconium bis(monohydrogenphosphate)(α-ZrP) intercalated with rare earth complex Eu(DBM)₃phen was prepared.The pre-intercalation of p-methoxyaniline into α-ZrP makes the interlayer separation large enough to exchange PMA with europium complex, thus, the luminescent assembly was prepared.This was confirmed by X-ray diffraction, UV-visible spectra and elemental analysis.The fluorescence spectra and lifetime of the assembly were also presented.

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Cofeeding of Methane and Ethane to Produce Syngas over a LiLaNiO/γ-Al₂H₃ Catalyst

Sheng Lin LIU, Guo Xing XIONG, Long Ya XU, Shi Shan SHENG, Wei Shen YANG

中国化学快报. 2000, 11(02): 175-178.

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可视化

Partial oxidation of methane and ethane to syngas over a LiLaNiO/γ-Al₂H₃ catalyst was investigated with a flow-reactor, XPS and XRD.Excellent reaction performance for CH₄-C₂H6-O2 to syngas over the LiLaNiO/γ-Al₂H₃ catalyst was achieved at 1073K, obtaining CO selectivity of 90%-95% and CH₄ conversion of~97%, with a wide range of C₂H₆ content in the feed and of space velocity.

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First Synthesis of Zirconia-pillared Layered Lanthanum Niobate

Lin XU, Wen Hua HOU, Can Xiong GUO, Qi Jie YAN

中国化学快报. 2000, 11(02): 179-180.

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可视化

A zirconia-pillared layered lanthanum niobate was prepared by first preswelling layered HLaNb₂O₇ with n-hexadecylamine(n-C₁₆H₃₃NH₂), then further reacting with zirconyl chloride aqueous solution, and finally calcining the resultant solid product in air.The obtained new material has an interlayer spacing of 1.36nm, and a high thermal stability above 700℃.

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The Dramatic Effect of Metal Precursor on the Catalytic Performance of Co/SiO₂ Catalyst for CO₂ Reforming of CH₄

Chuan Jing HUANG, Jin Hua FEI, Dong Jie WANG, Xiao Ming ZHENG

中国化学快报. 2000, 11(02): 181-184.

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可视化

The cobalt precursor affects the catalytic performance of Co/SiO₂ catalyst remarkably.The catalyst prepared from cobalt acetate exhibits excellent activity, stability and resistance to carbon deposition.

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Synthesis of Monoclinic Form of Gd_2-xNa_xCuO₄ by Direct Precipitation from Molten Salt

Lin ZHANG, Liang Zhong ZHAO, Jin Biao ZHANG, Cui Ying XU, Shi Hong LIU

中国化学快报. 2000, 11(02): 185-188.

摘要 ( )

可视化

A new phase of Gd_2-xNa_xCuO₄ was synthesized by direct precipitation from the mixture of Gd2O₃ and CuO in the molten KOH/NaOH/KNO₃ solution at temperature as low as 280℃.The resulting precipitate was characterized by using SEM, XRD, EDX, XPS and magnetic method.The XRD data indicate that the precipitated Gd_2-xNa_xCuO₄ is monoclinic with lattice parameters a=8.6816Å, b=3.7233Å.c=6.0796Å, α=γ=90°, β=108.75° and v=186.1Å3.

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2000年, 第11卷, 第02期　刊出日期：2000-02-20

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2000年, 第11卷, 第02期 刊出日期：2000-02-20

2000年, 第11卷, 第02期　刊出日期：2000-02-20