中国化学快报

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Synthesis of C₆₀ Nitroxide Derivatives

Tao GU, Chun TANG, Zhu De XU

中国化学快报. 1999, 10(02): 95-96.

摘要 ( )

可视化

C₆₀,derivatives covalently linked with the nitroxide radical of 2, 2, 6, 6-tetramethylpiperidine-1-oxyl have been synthesized by the following new method: C₆₀ reacts with 4-oxo-2, 2, 6, 6-tetramethyl-piperidinyloxyl (4-oxo-TEMPO) and an amino acid.

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An Efficient Method for the Synthesis of Aliphatic α-Organothio Aldoximes

Xin LIU, Rut Lian SHAO, Run Qiu HUANG

中国化学快报. 1999, 10(02): 97-98.

摘要 ( )

可视化

A new and simple procedure for the synthesis of aliphatic α-organothio aldoximes was reported. The aliphatic aldoxime was chlorinated by t-BuOCl, the resulting hydroxime acid chloride was treated with triethylamine and alkyl mercaptan in a one pot procedure to get the target compounds. The method is very efficient with high yield and good purity.

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Synthesis and Characterization of Boron Complex of Calix[4]arene

Kui LU, Yang Jie WU, Zhi Xian ZHOU

中国化学快报. 1999, 10(02): 99-100.

摘要 ( )

可视化

A new boron complex of calix[4Jarene was synthesized by the reaction of calix [4] arene with BMS; and the structure of the product was characterized by IR,₁HNMR, ₁₃CNMR, ₁₁BNMR and MS spectra.

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Efficient Isomerization for Preparing thans-2,2-Dimethyl-3-(2,2-dichloroethenyl) cyclopropanecarbonyl Chloride

Jun An MA, Run Qiu HUANG, Jun Ran CHENG, Rui Lian SHAO, Zai Guo LI

中国化学快报. 1999, 10(02): 101-102.

摘要 ( )

可视化

Traps-2,2-dimethyl-3一(2,2-dichloroethenyl) cyclopropanecarbonyl chloride, which is an important intermediate for insecticides, is obtained by isomerization of the cis/traps-mixture with 4- (N,N-dimethylamino) pyridine (DMAP) in the presence or absence of halogen compounds in good yield.

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Lactonization of 5-Phenylfuran-4-arylcarbinol-3-carboxylic Acids under the Catalysis of Boron Trifluoridc Etherate

Xiao Ping NIE, Xiu Lin YE

中国化学快报. 1999, 10(02): 103-104.

摘要 ( )

可视化

5-Phenyl-4-aroylfuran-3-carboxylic acids were reduced in aqueous alkaline solutions of NaBH₄ to afford hydroxy acids in excellent yields. Under the catalysis of boron trifluoride etherate, the hydroxy acids were converted to lactones smoothly.

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Synthesis of (4S)-4-Carboxyl-1-oxoperoxovanatranes

Chun Yuan TAO, Ping YAN

中国化学快报. 1999, 10(02): 105-106.

摘要 ( )

可视化

(4S)-4-Carboxyl-I-oxoperoxovanatrane and (4S)-3-methyl-4-carboxyl-l-oxoperoxovanatrane were synthesized from the reaction of potassium vanadate, hydrogen peroxide with L-N, N-bis (2-hydroxyethyl) serine or L-N. N-bis (2-hydroxyethyl) threonine in water.

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Stereoselective Synthesis of 2-(4-Hydroxyphenyl)-3-hydroxymethyl-1,4-benzodioxane-6-aldehyde-The Key Intermediate of Sinaiticin

Xue Gong SHE, Wen Xin GU, Hua WANG, Xin Fu PAN

中国化学快报. 1999, 10(02): 107-108.

摘要 ( )

可视化

2-(4-Hydroxyphenyl)-3-hydroxymethyl-l,4-benzodioxane-6-aldehyde 8, the key intermediate of sinaiticin 10. was synthesized in 6 steps from caffeic acid 4 and 4-hydroxybenzaldehyde 1, the coupling reaction is the key step.

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Synthesis of 3-(3-Hydroxypropyl)-phthalide and Pedicellosine

Qiang GAO, Shao Bai LI

中国化学快报. 1999, 10(02): 109-110.

摘要 ( )

可视化

3一(3-hydroxypropyl)-phthalide 1, a phthalide isolated from the flowers of G. pedicellata Wall, has been synthesized in high yield from 2-carboxybenzaldehyde 3 in 2 steps. Reaction of 1 with 2,3-dihydroxybenzoic acid afforded pedicellosine 2, another phthalide from the leaves of G pedicellata Wall.

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Total Synthesis of (3S, 6S)- (+)-3,7-Dimethyl-3-acetoxy-6-hydroxy-octa-1,7-diene

Zuo Sheng LIU, Jiong LAN, Yu Lin LI, Ya Cheng XING, Wen CEN

中国化学快报. 1999, 10(02): 111-112.

摘要 ( )

可视化

A total synthesis of (3S, 6S)- (+)-3,7-dimethyl-3-acetoxy-6-hydroxy-octa-l,7-diene via the rearrangement of chiral 2,3-epoxy alcohol, with the system of Ph₃P, pyridine, I₂ and H₂0, is described.

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1,2-Cyclic Monoacyl-rac-Glycerothio-phosphates of Cantharidin Analogues

Zheng Hong ZHOU, Ru Yu CHEN

中国化学快报. 1999, 10(02): 113-114.

摘要 ( )

可视化

A series of 1,2-cyclic monoacyl-rac-glycerothiophosphates of cantharidin and its analogues were synthesized in a one-pot procedure in overall yields of 44~55.5% by means of hexaethylphosphorus triamide as phosphorylating reagent.

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Synthesis, Structure and Antitumor Activities of Tridccapeptide PSPP3 from Papaver Somniferum Pollen

Jia Xi XU, Sheng JIN

中国化学快报. 1999, 10(02): 115-116.

摘要 ( )

可视化

Five analogs and five segments of the Papavor Somniferum pollen tridecapeptide PSPP3 were designed and synthesised by using solid-phase peptide synthesis method. Their inhibitive activities to human liver tumor cell Bel-7402 were assayed by MTT method and their secondary structures in solution were determined by CD spectra. The relationship of the structure and activity was discussed.

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Structural Studies of 3-(1,2-O-Isopropylidene-α-D-xylosyl)-5-phenyl-1,2,4-oxadiazole

Ming Long ZHANG, Yu Xin CUI, Ling Tai MA, Li He Zhang, Yang LU, Bin ZHAO, Qi Tai ZHENG

中国化学快报. 1999, 10(02): 117-120.

摘要 ( )

可视化

1,2-O-Isopropylidene-3-C-cyano-5-O-benzoyl-α-D-xylose 2 was prepared stereoselectively from 1,2-O-isopropylidene-3-oxo-5-O-benzoyl-α-D-xylose 1. The structure of 2 was studied by two-dimensional NMR spectroscopy in conjunction with X-ray crystallography of its corresponding 5-phenyl-1.2,4-oxadiazole isocarbonucleoside derivative 3. The absolute configurations of 2 and 3, and conformation of 3 are described herein.

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A New Competitive Inhibitory Monoclonal Antibody to Carboxypcptidase A (CPA)

Mei DU, Sheng JIN, Zhen Quan GUO

中国化学快报. 1999, 10(02): 121-122.

摘要 ( )

可视化

The monoclonal antibody ID₁₁D₇ to carboxypeptidase A (CPA) was prepared. The inhibitory effect of McAb ID₁₁D₇ on the peptidase activity of CPA was measured. The result reflects that the McAb ID₁₁D₇ can competitively inhibit the peptidase activity of CPA with an apparent inhibitory constant of 6.3 × 10^-9M. Based on this work, the McAb ID₁₁D₇ can be used as idiotypic antigen to prepare anti-idiotypic catalytic antibody with the peptidase activity similar to CPA.

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Didodecyldimethylammonium Bromide Films Containing Cobalt Phthalocyanine Tetrasulfonate for Electrochemical Catalysis

Nai Fei HU, Rong HUANG, Jing YANG

中国化学快报. 1999, 10(02): 123-124.

摘要 ( )

可视化

Electrochemistry of didodecyldimethylannnonium bromide (DDAR) films containing cobalt phthalocyanine tetrasulfonate (CoPcTS^4-) was examined. CoPcTS^4--DDAB film electrode showed stable cyclic voltanunetric responses in butlers and could catalyze reductions of trichloroacetic acid.

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A New Glycoside from Erigeron Breviscapus

Wei Dong ZHANG, De Yun KONG, Hui Ting LI, Gen Jin YANG

中国化学快报. 1999, 10(02): 125-126.

摘要 ( )

可视化

Erigeside 1 was isolated trom Erigeron breviscapus. The structure elucidation and ¹H¹³C NMR assignments were achieved by spectroscopic method.

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Enantiomeric Excess Determination of Amino Acids with Chiral Cyclopalladated Ferrocenylimine

Xiu Ling CUI, Yang Jie WU, Liang Ru YANG

中国化学快报. 1999, 10(02): 127-128.

摘要 ( )

可视化

An efficient NMR determination of the enantiomeric excess of the amino acids can be achieved using chloro-bridged dimer R- (+) -{Pd [η⁵-C5H5)Fe (η⁵-C5H3CMe=NAr)] (μ-Cl)}2(Ar=p-CH3C6H4) (R-1).

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A New Nor-neolignan from Cremanthodium ellisii

Bao Ning SU, Qi Xiu ZHU, Zhong Jian JIA

中国化学快报. 1999, 10(02): 129-130.

摘要 ( )

可视化

A new nor-neolignan, named ellisinin A (1), has been isolated from the traditional Tibetan medicinal plants of Cremanthodium ellisii. Its structure has been determined on the basis of spectroscopic evidence, especially by 2DNMR (¹H-¹HCOSY, HMQC, HMBC)

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New Dopamine Derivative from Lycium Barbarum

Cheng ZOU, Qing ZHAO, Chang Xiang CHEN, Yi Neng HE

中国化学快报. 1999, 10(02): 131-132.

摘要 ( )

可视化

A new dopamine derivative, lyciumide A, was isolated from the fruits of Lycium bnrbarum. Its structure was elucidated as p-methoxy-cis-cinnamoyl dopamine by spectral methods

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New Diterpenoid Alkaloids from the Roots of Aconitum excelsum Reichb

Shu Xiang ZHANG, Shi Shan JIA

中国化学快报. 1999, 10(02): 133-134.

摘要 ( )

可视化

Two new diterpenoid alkaloids have been isolated from roots of Aconitum excelsum Reichb. These new compounds were named excecoitine I and exceconidine II. The two structures were elucidated by spectroscopic methods as well as comparison with known compounds.

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Three New Styrylpyroncs from Goniothalamus leiocarpus

Qing MU, Chao Ming LI, Yi Neng HE, Han Dong SUN, Hui Lan ZHENG, Yang LU, Qi Tai ZHENG, Nan WU, Ren Wang JIANG

中国化学快报. 1999, 10(02): 135-138.

摘要 ( )

可视化

Three new styrylpyrones, named 7-epi-goniodiol 1, leiocarpin B 2 and leiocarpin C 3. were isolated trom the stem barks of Goniothalamus leiocarpus. Their structures were elucidated by means of spectral and chemical methods. The relative configuration of 1 and 2 were determined by X-ray crystallographic analysis.

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Erythrinarbine, a Novel nor-A ring Erythrina Alkaloid from Erythrina arborescens

Dong Lei YU, Jian GUO, Li Zhen XU, Shi Lin YANG

中国化学快报. 1999, 10(02): 139-142.

摘要 ( )

可视化

Erythrinarbine 2, a novel alkaloid was isolated from the stem of Erythrina arborescens Roxb. Its structure and stereochemistry were elucidated on the basis of the spectral analysis (¹³C-¹H COSY. ¹H-¹H COSY, NOESY and HMBC).

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A Novel Approach for Determining the Orientation of 3-Hydroxyl Group of Some Steroids by CIMS

Yuan Jiang PAN, Yao Zu CHEN

中国化学快报. 1999, 10(02): 143-144.

摘要 ( )

可视化

Trimethylchlorosilane was used as a stereoselective reagent to determine the a or a orientation of 3-hydroxyl group of some steroids by chemical ionization mass spectrometry.

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The Intermolecular Interaction in Self-Assembled Monolayers on Gold Electrode

Hui Bao SHAO, Da Yin LI, Jie Shu TU

中国化学快报. 1999, 10(02): 145-146.

摘要 ( )

可视化

The intermolecular interaction in an azobenzene self-assembled monolayers (SAMs) on gold electrode was investigated by controlling the assembling time and using mixed self-assembled techniques, and the variation of apparent electron transfer rate constant (k_s) of azobenzene SAMs with different molecular packing density is reported.

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Propensity Rules in Rotational Inelastic Collisions of NH₂ (Ã²A₁) under Molecular Beam Condition

Feng DONG, Sheng Li ZOU, Hong CHEN, Xue Chu LI, Nan Quan LOU

中国化学快报. 1999, 10(02): 147-150.

摘要 ( )

可视化

In this paper, it is the first time to report the study on the state-to-state rotational energy transfer (RET)of NH₂ (Ã² A₁;0,9,0) under molecular beam condition in detail. Through a systematic study of the relative population transferred as functions of initially excited quantum state, including different Ka, nuclear-spin, and even spin-doublet, some propensity rules were obtained directly.

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Highly efficient Rod-shape Poly (methacrylic acid-co-styrene-codivinylbenzene) High-performance Liquid Chromatographic Column

Jin Fang WANG, Zi Hui MENG, Liang Mo ZHOU, Qing Hai WANG, Dao Qian ZHU

中国化学快报. 1999, 10(02): 151-154.

摘要 ( )

可视化

A highly efficient copolymer (methacrylic acid-co-styrene-divinylbenzene) in situ making high-performance liquid chromatographic column was prepared and evaluated. The column efficiency calculated in terms of height equivalent to a theoretical plate was 25 pm and rapid separations of small molecules such as substituted aromatic hydrocarbons and aromatic acids were achieved within five minutes.

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Study on New Spectrophotometric Determination of Arsenic (V) with Chlorpromazine

Shao Min LIU, Yue Qin XIE, Yu Biao WANG

中国化学快报. 1999, 10(02): 155-156.

摘要 ( )

可视化

It was shown that a new sensitive spectrophotometric method for the determination of trace arsenic with chlorpromazine by the formation of heteropoly arsenomolybdic chlorpromazine complex in aqueous phase.

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DNA Immobilization on Nano-Gold Modified Glassy Carbon Electrode

Xiang Qin LIN, Qian MIAO, Bao Kang JIN

中国化学快报. 1999, 10(02): 157-160.

摘要 ( )

可视化

CT-DNA were electrochemically immobilized on the surfaces of both nano-gold modified glassy carbon electrode and bare glassy carbon electrode. The cyclic voltammetrie behavior of Co (phen)₃³⁺ adsorbed on the immobilized DNA was studied. Increase in the peak current of Co (phen)₃³⁺ redox reaction was obtained on nano-gold modified glassy carbon electrode. The result suggests that more DNA molecules were immobilized on this electrode and nano-gold modification can enhance the heterogeneous electron transfer rate constant of the Co (phen)₃³⁺.

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Study on the Absorption Properties of C₆₀ in Micellar Aqueous Solutions and Mechanisms for Solubilisation

Jin Li QIAO, Wei Jun JIN, Chuan DONG, Chang Song LIU

中国化学快报. 1999, 10(02): 161-164.

摘要 ( )

可视化

C₆₀ is successfully solubilized in micelle of six kinds of surfactants and UV/Vis spectra of C₆₀ in micellar system are studied. It is found that Brij-35 is the most efficient surfactant for solubilization of C₆₀ and the possible states of C₆₀ existed in surfactants are also studied. Experiments of surface tension show that the sites for solubilization of C₆₀ not only depend on the sorts of surfactants but also on their structures.

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The Channel Behavior of Gramicidin D in the Self-assembled Monolayer

WANG, Gong Quan SUN, Tian Hong LU, Hut YANG

中国化学快报. 1999, 10(02): 165-166.

摘要 ( )

可视化

It was found for the first time that gramicidin D (GD) molecules can be incorporated into the ODM monolayer which is self-assembled on the surface of the gold electrode and form monovalent canon channels.

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Novel Mixed LB Films of Porphyrin and Phthalocyanine Based on Molecular Recognition

Xi You LI, Yan Li CHEN, Hui Jun XU

中国化学快报. 1999, 10(02): 167-170.

摘要 ( )

可视化

The potassium salt of monocarboxylic substituted .porphyrin and mono crown ether substituted phthalocyanine can form heterodimer in solution and this kind of heterodimer can be fabricated into highly ordered LB films. The structures of the film were identified by absorption spectra, polarized absorption spectra and low angle X-ray diffraction methods.

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Synthesis of Syndiotactic Polystyrene with Novel Titanocene Catalysts Activated by Modified Methylaluminoxane

Fang Ming ZHU, Qun Fang WANG, Yu Tang FANG, Shang An LIN

中国化学快报. 1999, 10(02): 171-174.

摘要 ( )

可视化

Novel highly active n⁵-pentamethylcyclopentadienyltribenzyloxy titanium catalyst activated by modified methylaluminoxane (m-MAO) was prepared for styrene syndiospecific polymerization. The influences of the contents of trimethylaluminum (TMA) in m-MAO and external addition of tri-isobutylaluminum (TIBA) on the distribution of the oxidation states of titanium were investigated in detail. The Ti(III)is in favour of styrene syndiospecific polymerization in higher catalytic activity.

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Kinetics of Nonisothermal and Isothermal Crystallization of Metallocene Polyethylene

Yu Ying LI, Ji Jun ZENG, Jia Song HE

中国化学快报. 1999, 10(02): 175-178.

摘要 ( )

可视化

The kinetics of nonisothermal and isothermal crystallization of metallocene catalyzed and conventional polyethylenes has been studied by differential scanning calorimetry. Using Avrami equation, Ozawa theory and Mo Zhishen method, the experimental data have been analyzed. It is shown that metallocene polyethylene possesses a higher rate of crystallization due to a higher stereoregularity of its molecular chains. Moreover, they have different nonisothermal crystallization mechanisms and identical isothermal crystallization mechanisms.

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Preparation and Properties of (BEDT-TTF)₂Br3H₂O Salt

Qi Chun ZHANG, Pei Ji WU, Ke Jian JIANG, Rui Song DING, Yan Qiao WANG, Dao Ben ZHU

中国化学快报. 1999, 10(02): 179-182.

摘要 ( )

可视化

Electrochemical oxidation of BEDT-TTF (bis (ethylenedithio) tetrathiafulvalene) in chloroform/carbon disulfide (3:1) in the presence of Bu₄NBr as a supporting electrolyte at low current density results in the (BEDT-TTF)₂Br3H₂0 crystal. Its composition has been established by chemical analysis (Br, C, H, S), XPS and IR. The temperature dependence of the resistance has been studied down to 26K at ambient pressure. This material has weakly metallic behavior above 230K, and becomes a semiconductor below this temperature. The structure of the complex is also described.

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Lanthanide Complexes with Acetylacetone and 5-(4-Nitrophenyl)-10,15, 20-Triphcnylporphyrin Ligands

Dong Mei LI, Guo Fa LIU, Tong Shun SHI, Xiao Xun LIU, Ji Qing XU

中国化学快报. 1999, 10(02): 183-184.

摘要 ( )

可视化

Five lanthanide porphyrin complexes with 5-(4-nitrophenyl)-10, 15, 20-triphenyl porphyrin and acetylacetonate ligands were synthesized and characterized by elemental analysis, IR spectra, Uv-visible spectra, ¹H NMR. The structures of the complexes were proposed.

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Photochromism in CaS:Sm

Xiao Lin SUN, Gut Lan ZHANG, Guo Qing TANG, Wen Ju CHEN, Guang Yan HONG, Hong Peng YOU

中国化学快报. 1999, 10(02): 185-186.

摘要 ( )

可视化

The photochromism in CaS:Sm (from white to pink) was observed for the first time by exposing it to ultraviolet light. The experiments results show that the absorption intensity of Sm²⁺ in the range of 500~600nm was strongly increased after irradiation. valence changing of Sm. If the sample was excited by visible light This reveals that there is the again, the pink color turned to white, indicating that CaS:Sm has potential application in the field of storage material.

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Studies on A Novel Mixed-Valence Complex of Copper (Ⅰ, Ⅱ) α-Methacrylate with Imidazole and Aqua

Yao Yu WANG, Xin WANG, Qian SHI, Qi Zhen SHI, Yi Ci GAO

中国化学快报. 1999, 10(02): 187-188.

摘要 ( )

可视化

A novel mixed-valence copper (I, II) complex Cu₃ [CH₂=C(CH₃) COO]₅ (imH)₃ (H₂O) has been synthesized and characterised by XPS spectra and single crystal X-ray structural analysis The title complex crystallized in monoclinic space group P2₁/c, with a=11.225 (3), b=13.9023 (12) c=24.559 (2)Å, β=92.372 (10)° and Z=4. Final R=0.0495 for 5546 reflections [I>2σ(I)].

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本期目录

1999年, 第10卷, 第02期　刊出日期：1999-02-20

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本期目录

1999年, 第10卷, 第02期 刊出日期：1999-02-20

1999年, 第10卷, 第02期　刊出日期：1999-02-20