中国化学快报

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Synthesis of Novel Nucleoside:2'-deoxyuridine-3',5'-di(4,4'-dimethoxy-5,6,5',6'-dimethylenedioxybipheny1-2-methoxy carbonyl 2'-carboxylate)

Rui Yun GUO, Jun Biao CHANG, Rong Feng CHEN, Jing Xi XIE

中国化学快报. 1999, 10(05): 341-344.

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Abstract:Hepatitis B Virus (HBV) belongs to the family of hepadnaviridae which comprises several animal viruses, including human HBV, woodchuck hepatitis (WHV), ground squirrel hepatitis virus (GSHV) and duck hepatitis B virus (DHBV). These viruses share common features such as the genome organization, mode of replication and similar tropism for hepatocytes¹. 2'-deoxyuridine-substituted biphenyl carboxylate was synthesized as anti-hepatitis B agents. The structure was confirmed by UV, ¹HNMR spectrum and elementary analysis.

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Condensation Products from β-Keto-δ-valerolactones

You Ming WANG, Zheng Ming LI, Jia Feng LI

中国化学快报. 1999, 10(05): 345-346.

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Unexpected condensation products from β-Keto-δ-valerolactones were obtained. Their strnures were confirmed by ¹HNMR spectrum and elemental analysis.

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Synthesis of Chiral 3-Acylcamphors

Zheng Ning LI, Zhi Xiu XU, Zhuo ZHENG, Hui Lin CHEN

中国化学快报. 1999, 10(05): 347-348.

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3-Acylcamphors were synthesized in moderate yields by the condensation of camphor with esters using sodium hydride as a base.

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A Convenient Synthesis of α-Phenylsclcno-α,β-unsaturated Nitriles via Arsonium Salt

Gui Sheng DENG, Zhi Zhen HUANG, Xian HUANG

中国化学快报. 1999, 10(05): 349-350.

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α-Phenylsclcno-α,β-unsaturated nitrites were synthesized under mild condition via arsonium salt 1 in one pot reaction

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A Simple and Rapid Method for Synthesis of N,2-Diaryl Diazcnecarboxamides

Jian Ping LI, Hong WANG, Yu Lu WANG, Xiao Yang WANG, Cai Lan WANG, Dong Lan MA

中国化学快报. 1999, 10(05): 351-352.

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Using Fe₂(SO₄)₃/H₂SO₄ as oxidant. nine N.2-diary}diazenecarboxamideswere synthesized from diarvl substituted semicarbazides in excellent yield under mild conditions for the first time. hhis method is simple, convenient and rapid.

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Synthesis of Novel Asymmetrical Tri-tert-butyl Naphthalocyanine Using Structurally Distorted Subnaphthalocyanine

Xiao Bing WANG, Dai Hua TANG, Jian Cheng ZHANG, Xin Hou LIU

中国化学快报. 1999, 10(05): 353-356.

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A novel asynunetrical tri-Iert-butyl naphthalocyanine was prepared for the first time by the condensation method and by the use of structurally distorted subnaphthalocyanine. respectively The advantages of the latter method were more convenient purification and relatively higher yield.

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Synthesis of N⁶-Cyclopropy1-2,6-diamino-9 β-D-arabinofuranosylpurine

Jun Biao CHANG, Rui Yun GUO, Juan HE, Rong Feng CHEN

中国化学快报. 1999, 10(05): 357-360.

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Synthesis of N⁶-cvclopropyl-2,6-diamino-9 β-D-arabinofuranosyl-purine has been accomplished by treatment ailylated 2-amino-6-chloro-purine 4 with 2.3.5-tri-O-benzyl-β-D-arabinofuranosyl chloride 3 in the presence of molecular sieves follwed by reaction with cyclopropylamine and debenzyl reaction to give the β-anomeric nucleoside. The structures of all products were confirmed by UV. ¹H-NMR and elemental analysis.

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Synthesis and Biological Activities of ω-Heterocyclyl-ω-(1H-1,2,4-triazol-1-yl) Acetophenones

Chang Hu CHU, Xiao Wen SUN, Zi Yi ZHANG, Zhi Chun LI, Reh An LIAO

中国化学快报. 1999, 10(05): 361-364.

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A series of w-heterocyclyl-w-(1H-1.2.4-triazol-l-yl) acetophcnones have been synthesired. All the compounds were characteruzed by elemental analysis and spectral data. The preliminan biological test showed that some of them exhibited mild antilLngal and plant growth regulative activities.

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New Fungicidally Active Pyrazolyl-Substituted 1,3,4-Thiadiazole Compounds and Their Preparation

Han Song CHEN, Zheng Ming LI, Yu Feng HAN, Zhong Wen WANG

中国化学快报. 1999, 10(05): 365-366.

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The potassium dithiocarbazate 2 was obtained through condensation of 5-pyrazole hydrazide 1 with carbon disulfide in ethanolic potassium hydroxide, and its cyclization gave 5-pyrazolyl-1,3,4-thiadiazole-2-thione 3 in concentrated sulfuric acid. Alkylation of 3 yielded 2-alkylthio-5-pyrazolyl-1,3,4-thiadiazole 4. The preliminary bioassay tests indicated that compounds 3 and 4 have fungicidal activity.

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Synthesis and Electrical Conductivities of Fully Conjugated Schiff Base Macrocycles Containing 1,3,4-Oxadiazole

Shu WANG, Wen Ting HUA, Zhi Tao LI

中国化学快报. 1999, 10(05): 367-370.

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Conjugated Schiff base macrocycles containing 1,3,4-oxadiaoole were prepared by[2+2] cyclic condensation of phenylenediamine with 2.5-bis(m-formyl-phenyl)-1,3,4-oxadiazole. These macrocvcles with iodine or TCNQ produced stable charge-transfer complexes. The formation of complexes were identified by UV-Vis and FT-IR spectra.

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Synthesis of a Poly(amide-imide)from 5,6-Diphenyl-1-chloroformyl-3,4-benzenedicarboxylic Anhydride and Bis (4-aminophenyl)ether

Xi Gao JIAN, Lin CHENG, Hai Bin ZHEN, Zhi Yuan WANG

中国化学快报. 1999, 10(05): 371-372.

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A novel poly (amide-imidc) was prepared from a novel monomer:5,6-diphenyl-chlorofitrmvl-3,4-henzenedicarboylic anhydride and his (4-aminophenyl) ether. The polymer was oharacterized by FTIR, ¹FINMR. DSC and TGA.

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Synthesis and Properties of Ru(phen)₂(phen-NHCOCH₂Br)(PF₆)₂

Peng WANG, Yi YUAN, Guo Yi ZHU

中国化学快报. 1999, 10(05): 373-374.

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A new active material for ECI. sensor. Ru(phen)₂(phen-NHCH₂Br)(PF₆)₂, has been designed and synthesized. Its structure was confinncd by means of IR. MS and ¹H NMR. Also. some of its properties such as electrochuoistry. fluorescence and ECI, arc reported.

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Modifications of Norditerpenoid Alkaloids:Ⅰ.N-Deethylation Reactions

Fend Peng WANG, Ju Zheng FAN, Zheng Bang LI, Jin Song YANG, Bo Gang LI

中国化学快报. 1999, 10(05): 375-378.

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Usine oxidation with KMnO₄. KMnO₄/acetonc-H₂O, NBS. followed by Polonovsky reaction and imine formation. the N-deethylatiun of sit norditerpenoid alkaloids 6-epi-forsticine yunnaconitine, 3,13-diacetylyunnacunitine, 13-dehydry-indacunitine, indacunitinc and acetylpseudaconine are reported in 36-60% yields.

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Modifications of Norditerpenoid Alkaloids:Ⅲ. Preparation of 7,17-seco Yunnaconitine Derivatives via Rearrangement of Chloroamine

Fend Pang WANG, Ju Zheng FAN, Xi Xian JIAN, Bo Gang LI

中国化学快报. 1999, 10(05): 379-382.

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Preparation of both 7,17-seco yunnaconitine derivatives 6 starting from ynnnaconitine 3 via rearrangement of chloroamine 5 is described.

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DNA Cleavage by Copper (Ⅱ) Complexes Without added Coreactants

Rui REN, Pin YANG, Gao Yi HAN

中国化学快报. 1999, 10(05): 383-386.

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The cleavage activity of complexes between copper (Ⅱ)and tour different amino acid or amino acid methyl ester on DNA was tested at physiological pH and temperature. It was found that Cu (Ⅱ)-L-llis and Cu (Ⅱ)-L-llis methyl ester complexes could cleave DNA. The extent of DNN cleavage is largely dependent on the metal ion-to-ligand ratio. The cleavage of double-stranded DNA mediated by Cu (Ⅱ)-L-llis complccs occurs vin a hydrolytic mechanism.

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Differentiation Effect of Pentacoordinate Phosphorus on Carbohydrate Reaction

Yong JU, Yi CHEN, Yu Fen ZHAO

中国化学快报. 1999, 10(05): 387-388.

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The reaction between D-glucose. D-ribose and 2,2,2-trimethoxy-4,5-diphenyl-2,2-dihydro-1. 3. 2-dioxaphospholene were investigated by ³¹P NMR and FAB-MS. The results showed that there were a lot of differences in the reactions via pentacoordinate phosphorus compound. and it should give significant clue to the metabolism of carbohydrate phosphate in nature.

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A Triterpenoid Saponin from Polycarpon prostratum

Zhong Tao DING, Jun ZHOU, Ning Hua TAN, Rong Wei TENG, Jiang XIONG

中国化学快报. 1999, 10(05): 389-390.

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A new triterpenoid saponin, named prostratoside A, vvas isolated from the whole plants of Polycmpon prostratuna. Its structure was determined to be 3-0-{β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)-[β-D-glucopyranosyl-(1→2)-β-D-g lucopyranosyl-(1→4)-[β-D-glucopyranosyl-(1→2)]-α-L-arabinopyranosyl}-22α-acetosy-saikogenin G by spectroscopic methods.

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Triterpenoid Saponins from Clematis tangutica

Hui Min ZHONG, Chang Xiang CHEN, Xuan TIAN, Yu Xin CfIUI, Yao ZuCHEN

中国化学快报. 1999, 10(05): 391-394.

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Two new triterpenoid saponins, tanguticosidc A and B were isolated from aerial part of Clematis tangutica. Their structures were elucidated as 3-0-β->D-glucopyranosylhcderagenin 28-O-α-L-rhamnopyranosyl-(1→4)-β->D-glucopyranosyl-(1→6)-β->D-glucopyranoside 1 and 3-O-β->D-glucopyranosy-(1→2)-β->D-glucopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl-(1→4)-β->D-glucopyranosyl-(1→6)-β->D-glucopyranosidc 2, respcctively.

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New Diterpenoid Alkaloids from Delphinium Souliei Franch

Lan HE, Yuan Jiang PAN, Xuan PAN, Bo Gang LI, Yao Zu CHEN

中国化学快报. 1999, 10(05): 395-396.

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Continuing investigation of Delphinium souliei Pranch yielded wo minor new ditcrpcnoid alkaloids-soulinc E(1)and souline F(2). their structures were determined on the basis of spectroscopic evidences.

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A New Triterpenoid Glycoside from Decaisnea Fargesii

Jie KONG, Run Hua LU, Hai Xiang GAO, Min WANG, Yun Pn WANGand Han Qing WANG

中国化学快报. 1999, 10(05): 397-400.

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A new triterpenoid glycoside, named decaisosidz F. has been isolated from Decaisnea fargesii. Its structure was determined on basis of chemical method. FBA-MS. homonuclear and heteronuclear correlation esperiwnts. including ¹H-¹H COSY. ¹H-¹³C COSY. TOSCY. HMBC and NOESY techniques to be 3-O-β->D-xylopyranosy (1→3)-α-L-arhamnopyranosyl (1→3)-α-L-arabinopyranosvi hederagenin 28-O-β->D-xylopyranosyl (1→4)-β->D-glucopyranosyl(1→β-D-glucopyranoside.

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A Novel Eleven-membered Heterocyclic Compound from Algae Sargassum Vachell

Shi Hai XU, Ying Zhou CEN, Yao Lan LI, Shao Yu XU

中国化学快报. 1999, 10(05): 401-402.

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A novel eleven-membered heterocyclic compound with high nitrogen has been isolated from the marine alga Sargassum vachell collected from the South China Sea. Its structure has been established by verity of spectroscopic techniques such as IR. EIMS. ID NMR. ¹H-¹HCOSY. HMQC. HMBC.

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Determination of Trace Manganese (Ⅱ) by Its Catalytic De-colourizing Reaction On the Aerial Oxidation of 1.5-bis (2-hydroxy-5-chlorophenyl)-3-cyanoformazan and Its Kinetic Reaction Mechanism

Shao Min LIU, Jiao Mai PAN

中国化学快报. 1999, 10(05): 403-406.

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A kinetic method is described for the determination of trace amounts of maneancse(Ⅱ) based on its catalytic effect on the aerial oxidation of 1.5-bis (2-hydrox)-5-chlorophenyl)-3-cyanofonnazan. The reaction is followed spcctrophotometrically by measuring the rate of change in absorbancc at 580nm. The calibration curve (rate constant vs. manganese concentration) is linear in the range of 10~200ng in 25ml solutions. Kinetic parameters of the reaction arc reported. There are few interfcrences.

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Electrocatalytic Oxidation of Ethanol on Electrodcposited Palladium Electrode

Pei Liang SHE, Shi Bing YAO, Shao Min ZHOU

中国化学快报. 1999, 10(05): 407-410.

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The oxidation of ethanol in 1.0 mol/L NaOH was studied on Pd/GC electrode prepared by electrodeposition. The results show that (1) Pd/GC electrode can also demonstrate electrocatalytic activity towards the oxidation of ethanol:(2) two backward anodic peaks on the cathodic branch appear when the ethanol concentration is raised up to 0.5 mol/L.

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A Spectrophotometric Study on the Host-Guest Complexation of β-Cyclodextrin with 3-Indolyl Acetate in Dilute Aqueous Solution by Determining Solubility of Guest Substance

De Zhi SUN, Jian CHENI, Wei Min LU and Xiao Ming ZHENG

中国化学快报. 1999, 10(05): 411-414.

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3-Indolyl acetate can be solubilized in dilute ayueous solution of beta cyclodextrin. due to the formation of host-guest complex through hydrophobic interaction between the indolyl group and the inside cave of the cyclodextrin molecule.The thermodynamic parameters of the complexing process can be estimated utilizing the spectrophotometric data.

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A Study of a Molecular Mechanics Field Used in Simulating Enantiorecognition

He Qing SHEN, Qing Hai WANG, Dao Qian ZHU, Liang Mo ZHOU

中国化学快报. 1999, 10(05): 415-418.

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A molecular mechanics field, Alchemy 1l, was utilized to model the chiral recognition between S-N-acetyl-α-methyl-I-naphthylamine and (R, S)-N-(3, 5-dinitrophenyl)-α-methyl-benzeneacetamide and between β-cyclodextrin and (R, S)-fenoprofen. Some preliminary results have been obtained to sustain the three-point action models and the induce-tit action in enantiorecogmtion.

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Crystallization Behevior of Poly(3-dodecylthiophene)

Xiu Ying QIAO, Xian Hong WANG, Zhi Shen MO, Hong Fang ZHANG

中国化学快报. 1999, 10(05): 419-420.

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The crystallization behavior of poly (3-dodecylthiophene) (P3DDT) is studied by differential scanning calorimetry (DSC) under different cooling rates. When the methods of Jeziorw.Ozawa and a new one proposed by our laboratory are applied to describe its nonisothermal crystallization behavior. the new one is confirmed to be the best and convenient. By determining kinetic parameters. the analysis of the nonisothermal crystallization behavior is performed. According to Kissinger method. the crystallization activation energy of P3DDT is also evaluated.

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A New Self-Assembled Monolayer of Fullerene Derivative and ItsPhotoelectric Conversion Property

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

中国化学快报. 1999, 10(05): 421-424.

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A new self-assembled monolayer (SAM) of fullerene derivative has been fabricated and their photoelectric conversion property has been observed. The SAM was fabricated on indium-tin-oxide (ITO) and quartz by amide bonding. It was characterized by contact angle, UV spectrum, and cyclic voltammetrv.The mild fabrication conditions and the stability of the SAM provides a way to build three-dimensional structure more easily.

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High-Yield Synthesis of Endohedral Metallofullerenes Y@C_2n and Y₂@C_2n

Yong Fu LIAN, Zu Jin SHI, Xi Huang ZHOU, Xiao Ran HE, Zhen Nan GU

中国化学快报. 1999, 10(05): 425-428.

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A series of yttrium metallofullerenes. some of them are first reported. have been synthesized by the DC arc discharge method at high helium pressure. Mass spectra results show that the contents of metallofullerenes are very high both in primary soot and in CS₂ or DMF extract and Y@C₈₂ with ca. 85% purity is obtained through column chromatographic isolation.

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Preparation and Thermal Decomposition of [Cr (salen) (H₂O)₂] Cl

Bao Xue ZHOU, Shu Qin JIANG, Ding ZHOU, Yu Ting ZHAO

中国化学快报. 1999, 10(05): 429-432.

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A complex of N.N'-ethylenebis (salicylidenciminato) diaquochromium(Ⅲ) chloride.[Cr (salen) (H₂O)₂] Cl was prepared, and its decomposition mechanism was studied by TG and DTA. The IR spectrum of the product of thermal decomposition was examined at the first stage Kinetic results were obtained from the analysis of TG-DTG curves with three different methods The most probable kinetic functions were suggested by comparison of kinetic parameters.

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Novel Ruthenium Catalyst (K-Ru/C_60/70) for Ammonia Synthesis

Guang WEI, Li Hua WANG, Yi Ji LIN, Jun YI, Hong Bo CHEN, Dai Wei LIAO

中国化学快报. 1999, 10(05): 433-434.

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A novel ammonia-synthesis catalyst, potassium-promoted ruthenium supported on fullerene (K-Ru/C_60/70), was prepared and evaluated. It was found that K-Ru/C_60/70 was the most active catalyst for ammonia synthesis at atmospheric pressure and 623 K compared with other support materials such as silica, activated carbon, zeolite, γ-Al₂O3 and rare earth metal oxide.

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1999年, 第10卷, 第05期　刊出日期：1999-05-20

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1999年, 第10卷, 第05期 刊出日期：1999-05-20

1999年, 第10卷, 第05期　刊出日期：1999-05-20