中国化学快报

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An Efficient Synthesis of Dicyclohexylmethyl Diazoacetate

Zheng Ning LI, Zhuo ZHENG, Hui Lin CHEN

中国化学快报. 1999, 10(06): 435-436.

摘要 ( )

可视化

Dicyclohexylmethyl diazoacetate was synthesized in excellent yield from the corresponding glycinate. which was derived in high yield from dicyclohexylmethyl chloroacetatc via azide substitutuion. and reduction.

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A Novel Stereoseletive Approach to (E)-Vinylic Selenides

Jun Hua WANG, Xian HUANG

中国化学快报. 1999, 10(06): 437-440.

摘要 ( )

可视化

The insertion of elemental selenium into the Csp²-Zr bond of alkenylchloro-zirconocenes affords (E)-vinylseleno zirconocenes, which were trapped by alkyl halides giving (E)-vinylic selenides in moderate to good yields.

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Intramolecular Induction of Asymmetric Darzen's Condensation of Aldehydes with Chiral α-Chloroacetates

Guo Bin HUANG, Gan Feng CAO, Ke Mei WU, Liang HUANG

中国化学快报. 1999, 10(06): 441-442.

摘要 ( )

可视化

The asymmetric Darzen's condensation of aldehydes with α-chloroacetates of some naturally occurring or synthetic chiral alcohols was described. The de% of products fell over the range of 4.78% to 99%.

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Synthesis of d,l-α-Tocopherol Catalyzed by Heteropoly Acids

Dong QIAN, Jia CUI, Yan Zhi TAN, Kai Yi WANG

中国化学快报. 1999, 10(06): 443-444.

摘要 ( )

可视化

d,l-α-lbcopherol(vitamin E) is found to be synthesized by condensing trimcthylhydroquinone with isophytol catalyzed by heteropoly acids(HPA) H₂PW₁₂O₄₀ and H₂PMo₁₂O₄₀ at room temperature. These HPA are efficient catalysts for the synthesis of d,l-α-Tocophcrol and can easily be separated from the reaction mixture and reused.

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Synthesis of New Cyclic Phosphate of Arylglyoxylonitrile Oxime and Their Diastereomers

Zhi Hua MA, Rui Lian SHAO, Hong Min MA, Jun Ran CHENG, Run Qiu HUANG

中国化学快报. 1999, 10(06): 445-446.

摘要 ( )

可视化

Keeping in view the biological activities of 1,3,2-dioxaphosphorinane-2-one and oxime esters, some compounds possessing these two moieties have been synthesised. The contieurational assignment and the ratio of cis trans diastereomers of target products were pertbrmed on basis of ¹H NMR. ³¹P NMR and confirmed by X-ray diffraction analysis.

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Synthesis and Stereostructure of New β-Lactam Derivatives of 1,5-Benzothiazepines

Yuan LI, Na SUN, Sheng JIN

中国化学快报. 1999, 10(06): 447-448.

摘要 ( )

可视化

Reaction of 1,5-benzothiazepine with N-proteeted glycine gives new α-amino-β-lactam dvriwtivcs of 1,5-benzothiazepine. The configuratiun and conformation of the product were contirmed by x-ray diffraction. The result further reveals that the reaction of 1,5-benzothiazepines with derivatives of carboxylic acid is stereospecific.

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Synthesis of (+) 8-O-Cinnamyl-p-chlorogoniotriol and its Analogues

Hong CHEN, Long En ZHOU, Yan Jun ZHANG, De Quan YU

中国化学快报. 1999, 10(06): 449-452.

摘要 ( )

可视化

(+)8-O-Cinnamyl-p-chlorogoniotriol (p-chlorohowiinol A) and its analogues have been synthesised in nine steps from α-D-glucoheptonic-γ-lactonc. Pharmacological tests showed that most of the compounds possessed antitumor activities toward tumor cell in voro.

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Modification of Norditerpenoid Alkaloids:Ⅱ.A Simple and Convenient Preparation of the Imine Derivatives of Norditerpenoid Alkaloids

Feng Peng WANG, Zheng Bang LI, Jin Song YANG, Bo Gang LI

中国化学快报. 1999, 10(06): 453-456.

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可视化

Teatment of 3-acetylpseudaconie 6 and 3. 13-diacetylyunnaconitine 9 with NBS/acetone-H₂O (2:1) at room temperature produced corresponding imine derivatives 8 and 10, respectively.in good yields. This is a novel simple and convenient method for preparation of the iminc compounds.

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A Novel Synthesis of Methyl 4,6-O-Benzylidene-α-D-Glucopyranoside 2,3-Cyclic Phosphite Ethyl Ester

Jian Jun HU, Yong JU, Yu Fen ZHAO

中国化学快报. 1999, 10(06): 457-458.

摘要 ( )

可视化

A new compound, methyl 4,6-O-benzylidene-α-D-glucopyranoside 2,3-cyclic phosphite ethyl ester was synthesized via the reaction of methyl 4,6-O-benzylidene-α-D-glucopyranoside and ethyl dichlorophosphite. Its structure was confirmed by NMR and MS spectral methods.

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A New Binuclear Bisphthaloeyanine:Tetrahydroxo(hexa-tetradecanobisphthalocyaninato) Disilicium

Dai Hua TANG, Xiao Bing WANG, Zhen ZHEN, Feng Qi WANG, Xin Hou LIU

中国化学快报. 1999, 10(06): 459-462.

摘要 ( )

可视化

A new binuclear bisphthalocyanine-tetrahydroxo(hexa-tetradecanobisphthalocyani-nato) disilicium is synthesized and characterized. and one of its important applications is introduced.

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Huperzine H,a New Lycopodium Alkaloid from Huperzia serrata

Wen Yun GAO, Yi Ming LI, Bao De WANG, Da Yuan ZHU

中国化学快报. 1999, 10(06): 463-466.

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可视化

A new lycopodium alkaloid with a novel skeleton was isolated from Huperzia serrata Its structure was determined on the basis of spectral evidences.

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A New Di-(p-hydroxybenzyl) Hydroxylamine from Gastrodia eleta Bl

Xiao Yan HAO, Ning Hua TAN, Jun ZHOU

中国化学快报. 1999, 10(06): 467-468.

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可视化

It is the first reported that a new nitrogen-containing non-amino acid type organic component 1 isolated from one of the well known traditional Chinese herb medicines. Gastrodia eleta B1. Structure elucidation and unambiguous NMR assignments for the title compound were carried out mainly on the basis of 1D and 2D NMR experiments.

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Selective Cyclooxygenase-2 Inhibitors:Design and Synthesis

Xin Sheng LEI, Zong Ru GUO, Ling Bo QU, Qi Qing ZHU

中国化学快报. 1999, 10(06): 469-472.

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可视化

The discovery of COX-2 provides a novel target developing more ettective NSAIDs with fewer side effects. On the basis of results from the structure-activity relationships (SAR) of selective COX-2 inhibitors. we have designed and synthesized some promising compounds.

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A New Triterpenoid Oligoglycoside Escin IVe from the Seeds of Aesculus Chinensis

Jing ZHAO, Xiu Wei YANGI, Yu Xin CUl, Xue Hui LIU, Shun He OUYANG

中国化学快报. 1999, 10(06): 473-476.

摘要 ( )

可视化

A new triterpenoid saponin named escin IVe was isolated from the seeds of Aesculus chinensis. Its structure was established as 28-tigloylprotoaescigenin-3β-O-[β-D-glucopyranosyl(1-2)][β-D-glucopyranusyl (1-4)]-β-D-glucopyranosiduronic acid.

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New Coumarins From Peacedanum Decursivum

Nian Huan YAO, Ling Yi KONG

中国化学快报. 1999, 10(06): 477-480.

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可视化

Four new Coumarins named Decursitin B. C. D, F have been isolated from traditional Chinese medicine-the root of Peacedanum decursivum. Their structures were elucidated by chemical evidences and spectral analysis.

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Three Novel Bicyclic Taxoids from the Needles of the Chinensis yew, Taxus chinensis var mairei

Qing Wen SHI, Takayuki ORITANI, Takeyoshi SUGIYAMA, Qian CHENG

中国化学快报. 1999, 10(06): 481-484.

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Three novel bicyclic taxane diterpenoids with the rare 6/12-membered rings wereisolated from the need ies of Taxus chinensis var. mairei. The structures were established with the help of 1D and 2D NMR spectral analysis.

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New Triterpene Glycoside from Thalictrum smithii

Shi Chun YU, Qing Li WU, Li Wei WANG, Pei Gen XIAO

中国化学快报. 1999, 10(06): 485-486.

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可视化

A new triterpene glycoside, 24S-cycloartane-3β,16β, 24, 25, 30-pentaol 3-O-(2-O-β-D-xylosyl)-β-D-xyloside was isolated from Thalictrum smithii. Its structure was determined by spectroscopic and chemical methods.

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A Novel Sesquiterpene Polyol Ester from Celastrus Angulatus and its Antitumor Activities

Wei Ping YIN, Tian Zeng ZHAO, Ling Jie GAO, Da Peng ZOU, Jian Xun KANG

中国化学快报. 1999, 10(06): 487-490.

摘要 ( )

可视化

A new sesquiterpene polyol ester was isolated from the leaves of Celastrus angulatus. Its structure was determined as 1β, 2β,9α-triacetoxy-8α-(α-hydroxyl-isobutyryloxy)-15-benzoyloxy-4α-hydroxy-dihydroagarofuran by means of NMR, MS and IR spectral analysis. Preliminary biological study on antitumor activity revealed that this compound showed strong nonselective cytotoxicity against four of the NCI panel cell lines.

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Eupatoranolide, a New Sesquiterpene Lactone from Eupatorium adenophorum

Zhi Hui DING, Jing Kai DING

中国化学快报. 1999, 10(06): 491-494.

摘要 ( )

可视化

A new sesquiterpene lactone eupatoranolide was isolated from the flowers of Eupatorium adenophorum, its structure was elucidated as 2β-acetoxy-(7α. 9βH)-3,6(11)-cadinadien-12(7)-olide by spectral analysis.

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Poly-N-Isopropylacrylamide Hydrogel Based Fluoroimmunoassay of Methyltestosterone

Jun GAO, Yuan Zong LI, Zhen Quan GUO, Wen Bac CHANG, Yun Xiang CI

中国化学快报. 1999, 10(06): 495-498.

摘要 ( )

可视化

A novel immunoassay method for methyltestosterone (MT) in serum was developed. The antigen of MT (Ag_MT)was synthesized by covalently bonding MT to BSA and raising its antibody (Ab_MT). Ab_MT was conjugated to poly-N-isopropylacrylamide (p-NIPAAm) to form Ab_MT bound thermally reversible hydrogel p-NIPAAm-Ab_MT. A competitive immunoassay method based on the competition of fluorescein isothiocyanate (FITC) labeled MT antigen (FITC-Ag_MT) and free MT with limited amount of p-NIPAAm-Ab_MT was established. The separation in the assay process was achieved by precipitation of the immuno-complex above its critical solution temperature. The detection limit for MT is 50 ng/ml. The recoveries of MT from human serum are satisfactory.

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Dual-parameter Correlation Analysis of the Fluorescence Data of 1-Methyl-2-formyl-5-substituted Pyrrole(4-nitrophenyl)hydrazones

Roderick Hat Ying HE, Xi Kui JIANG

中国化学快报. 1999, 10(06): 499-502.

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可视化

By using 1-methyl-2-formyl-5-Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength[λ_max(em)] values of their fluorescence spectra have been measured. Correlation results show that the △E_em values are mainly affected by polar effects, but spin-delocalizatin effects also exist.

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The Electronic Structure of Molecular Ion [Mo(qdt)₃]^2- (qdp:quinoxaline-2,3-dithiolate)

Wen LI, Jian Ping YE, Chen Ho TUNG

中国化学快报. 1999, 10(06): 503-504.

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可视化

The electronic structure of the molecular ion has been calculated by DV-Xα method. The calculated nitrogen atomic charge is high in negative. The frontier molecular orbitals are mainly composed of Mo and S atomic valence orbitals. Total density of state reveals that there are wide bands below and above the E₁, energy.

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Synthesis, Electrochemistry, and Fluorescence of Two Ru(phen)₃2+-based Surfactants

Peng WANG, Xiao Yan JING, Jun WANG, Guo Yi ZHU

中国化学快报. 1999, 10(06): 505-506.

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可视化

Two new Ru(phen)₃²⁺-based surfactants. Ru(phen)₂(phenNHCO-C₁₁)(PF₆)₂ and Ru(phen)₂(phenNHCO-C₁₇)(PF₆)₂, have been designed and synthesized, whose chemical structures were characterized by means of IR, ¹H NMR and MS. Also, electrochemistry and fluorescence of them are reported.

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Metal Ion Complexation of Bilirubin Monolayer

Jian-Ming OUYANG, Chuan LI, Wei Han LING, Wen Jie ZHENG

中国化学快报. 1999, 10(06): 507-510.

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The surface pressure-area isotherms of bilirubin (BR) monolayers at an air-water interface on subphases with and without metal ions were investigated. The formation of BR-metal complexes leads to changes in the shape of isotherms of BR and changes in UV-visible absorption spectra of the monolayer assemblies. In XPS spectra new XPS peaks assigned to the metal ions containing subphases appeared. Low-angle X-ray diffraction indicates this Y-type LB films of MBR were formed with bilayer spacing of ca. 2.1 nm.

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The Isomeric Structures of H₂GeLiF, the Prototype Germylenoid

Hua Yu QIU, Wan Yong MA, Guan Bin LI, Cong Hao DENG

中国化学快报. 1999, 10(06): 511-514.

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可视化

The structures of four isomeric forms of the model germylenoid, H₂GeLiF. have been examined by ab initio MO theory. The most stable structure is suggested to be the p-complex 1. The other three species, three-membered ring 2, σ-complex 3 and tetrahedron 4, are also local minima on the potential energy surface, but are higher in energy.

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Molecular Dynamics Studies on Thermal Behavior of a FAU-type Zeolite

Ting Jun HOU, Ming Juan JI, Hui Liu, Xiao Wei Huang, Xue Qi Ye, Xing Yun Liu, Xiao Jie XU

中国化学快报. 1999, 10(06): 515-518.

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可视化

Molecular Dynamics (MD) simulations of siliceous FAU-type zeolite were carried out at various temperatures, to investigate its thermal behaviors. From the study, we found that pure silicon faujasite showed different thermal behaviors below 1500K and above 1500K; its cell volume gradually shrinks with the rising of the temperature below 1500K, the cell volume of the zeolite changes little above 1500K.

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Synthesis of ZSM-5 Zeolite with Small Crystallite and its Application in Aromatiration of Propane

Ming LIU, Nai Jia GUAN, Shou He XIANG, Jian Xiang ZHANG, Shang Yuan LIU, Shu Quan LIU

中国化学快报. 1999, 10(06): 519-520.

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可视化

By optimizing the cystallization condition, a procedure for the synthesis of small crystallite reolite GSM-5 was developed. Compared with the larger crystallite GSM-5, the smaller one exhibits higher catalytic performance in aromatiration reaction of propane.

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Synthesis and Characterization of the Host-Guest Nanocomposite Material Zeolite Y-Iron Bipyridine

Yan Xia JIANG, Wen Bo SONG, Ying LIU, Hong Ding XU

中国化学快报. 1999, 10(06): 521-524.

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可视化

This paper reports the synthesis of host-guest nanocomposite material[Fe(bpy)₃]²⁺Y (where bpy=2,2'-bipyridine) using the flexible ligand method. X-ray diffraction analysis. adsorption technique, and cyclic voltammetry were used to characterize the material. The results show that[Fe(bpy)₃]²⁺ has been entrapped in the supercage of zeolite, its electron transfer is realized by electron hopping of[Fe(bpy)₃]²⁺ within the supercage of zeolite.

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Study on a New Method of Extraction of Metal Ions from Solid Matrices by Supercritical Fluid

Zhao Jie CUI, Jun Cheng LIU, Lain Cun GAO, Ying Qin WEI, Jun Zeng ZHANG

中国化学快报. 1999, 10(06): 525-528.

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可视化

8-Hydroxyquinoline. methanol and Triton-100 were first used together in the extraction of metal ions by supercritical CO₂, In the new system, the effects of pressure, temperature and the volume of CO₂, on the efficiency of supercritical fluid extraction (SFE) were systematically investigated. The recovery under the optimum condition was only 11.38%, but if suitable concentration of methanol (v/v=5%) was added to the supercritical CO₂, the recovery was increased significantly (83.60%. RSD=4.37%. n=5). In order to further enhance the recovery Triton X-100 was added to the samples, and the results were satisfactory (96.62%. RSD=2.85%. n=5).

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1999年, 第10卷, 第06期　刊出日期：1999-06-20

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1999年, 第10卷, 第06期 刊出日期：1999-06-20

1999年, 第10卷, 第06期　刊出日期：1999-06-20