中国化学快报

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α-OXOKETENE CYCLIC DITHIOACETALS CHEMISTRY──REACTION OF α,α-DIOXO(ESTER)KETENE CYCLIC DITHIOACETALS WITH BUTANONE

Zai Ming ZHU, Yong Ting XU, Qun LIU, Jie Han HU

中国化学快报. 1996, 7(02): 95-98.

摘要 ( )

可视化

Cyclic dithioacetals of α,α-dioxo (ester) ketone 3 were reacted with butanone to afford the Michael adducts 4,catalyzed by metal Na.This process provides a new method for the synthesis of ring-compouds in good yield under mild conditions.

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ZEOLITE-CATALYZED FRIEDEL-CRAFTS ACYLATION OF AROMATICS:I.SYNTHESIS OF 4-ACYL ANISOLE WITH A HY CATALYST

Qi Long WANG, Yu Dao MA, Xing Dong JI, Hao YAN, Qin QIU

中国化学快报. 1996, 7(02): 99-102.

摘要 ( )

可视化

A series of aromatic ketones 4-acyl anisole were synthesized with high yield by using carboxylic acids as acylating agents and a HY zeolite as catalyst.

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THE SYNTHESIS OF 4,5-BIS(4'-BROMOBENZYLTHIO)-1,3-DITHIOLE-2-THIONE WITH ONE DIMENSIONAL INTERMOLECULAR INTERACTIONS

Fang QI

中国化学快报. 1996, 7(02): 103-104.

摘要 ( )

可视化

The title compound BBBT-DTT (C₁₇H₁₂Br₂S₅,Mr=536.42) has been synthesized and its structure feature has been described.BBBT-DTT is characterized by one dimensional chains formed by S…S (head to head) and Br…Br (tail to tail) intermiolecular interactions.

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A NEW APPROACH TO SYNTHESIZING 2-ALKOXYCARBONYL-2-METHYL ETHYL TIN TRICHLORIDES AND THEIR COMPLEXES WITH DBSO AND HMPA

Lai Jin TIAN, Fang Xin FU, Hua De PAN

中国化学快报. 1996, 7(02): 105-106.

摘要 ( )

可视化

A new approach based on transesterification reaction to synthesizing 2-alkoxycarbonyi-2-methyl ethyl tin trichlorides and their complexes with dibenzylsulfoxide (DBSO) and hexam-ethylphosphoramide (HMPA)was reported.They were characterized by elemental analysis,IR and ¹HNMR spectra.The possible mechanism for transesterifications was suggested.

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STUDIES ON THE SYNTHESES OF FAVELINES

Gang LIN, Xue Chao WANG, Xin Fu PAN

中国化学快报. 1996, 7(02): 107-108.

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可视化

A novel and efficient convergent synthesis of 13-demethyldeoxofaveline,a Key intermediate for deoxofaveline,faveline and faveline methyl ether,was achieved by Wittig reaction and selective oxidation.And a novel sixteen-membered ring compound has been obtained in the meantime.

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A CONVERGENT SYNTHESIS OF (E,E,E)-3,7,13-TRIMETHYL-6-(i-PROPENYL)-7,14-DIHYDROXY-2,8,12-TETRADECATRIEN-1-METHYLAL

Yi qian Wan, Jing Yu SU, Qing LIU, Long Mei Zeng

中国化学快报. 1996, 7(02): 109-110.

摘要 ( )

可视化

Starting from geranial a new synthetic route for compound 6,(E,E,E)-3,7-13-trimethyl-6-(i-propenyl)-7,14-dihydroxyl-2,8,12-tetradecatrien-1-methylal,a key intermediate in the synthesis of diterpene epi-mayol is described.

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SYNTHESIS OF ANALOGUES OF HUPERZINE A 4.THE PREPARATION OF A PYRIMIDONE ANALOGUE OF HUPERZINE A

Yun Long LI, Xu Chang HE, Dong Lu BAI

中国化学快报. 1996, 7(02): 111-114.

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可视化

The preparation of a pyrimidone analogue 2 of huperzine A is described,in which the pyridone ring of the natural alkaloid is replaced by pyrimidone.The key intermediate β-ketoester 9 was obtained from cyclohexane-1,4-dione monoethylene ketal via 6 steps.Then using the methodology of total synthesis of huperzine A,the construction of bicyclo[3.3.1]nonane moiety substructure was achieved,and 2 was finally afforded in low yield.

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SYNTHESIS AND ANTICHOLINERGIC ACTIVITIES OF 6,11-DIHYDRODIBENZ［b,e］OXEPIN AND 6,11-DIHYDRODIBENZO［b,e］THIEPIN HYDROXYCARBOXYLATES

Shou Hai GAO, Liu Hong YUN

中国化学快报. 1996, 7(02): 115-118.

摘要 ( )

可视化

New tricyclic hydroxycarboxylates-dibenz[b,e]oxepin and dibenzo[b,e]thiepin hydroxycarboxylates (7) were synthesized by modifying the structures of xanthene compounds.The pharmacological results showed the antagonistic activities of these tricyclic compounds were all decreased at different levels after this modification,but they exhibited more selective action on the central nicotinic receptor.Especially,the compounds containing sulfur atom almost have no action on the muscarinic receptors,they were still quite potent to the central nicotinic receptor.

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PRACTICAL METHOD FOR SYNTHESIS OF NEW GLYCOLIPIDS N-[4-(DIALKYL-L-GLUTAMATECARBONYLETHYLCARBO-NYLAMINO)BUTYL] LACTOBIONAMIDES

Zhong Zhi ZHANG, Kimitoshi FUKUNAGA, Yoshiaki SUGIMURA, Katsumi NAKAO, Toshimi SHIMIZU

中国化学快报. 1996, 7(02): 119-122.

摘要 ( )

可视化

A simple and efficient method for the synthesis of new glycolipids containing oligosaccharide and two long alkyl chains N-[4-(dialkyl-L-glutamatecarbony lethylcarbonylamino)butyl]lactobionamide has been developed in moderate yield.We successfully selected succinic anhydride which could condese with dialkyl L-glutamates in almost quantitative yields.The aminolysis of lactonolactone with 1,4-diaminobutane could be carried out in quantitative yield.The glycolipids prepared by this method have three amino acid residues between hydrophobic segment and hydrophilic moiety of the glycolipid which can be considered to maintain the steric conformation of lipase in enzymatic reactions.

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POLYCLONAL ANTIBODY-CATALYZED HYDROLYSIS OFβ-NAPHTHOL ACETATE

Bing Hui YANG, Huang Kuan KONG, Ji Qing JIANG, Yong Yong JI, Ming YEH

中国化学快报. 1996, 7(02): 123-126.

摘要 ( )

可视化

A polyclonal antibody elicited against hapten (4) catalyzed the hydrolysis of β-naphthol acetate with a rate acceleration of 46400 folds.

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HYDROLYTIC CLEAVAGE OF ACMET-GLY PROMOTED BY CIS-[Pd(MET)(D₂O)₂](NO₃)₂

Xiao Hua CHEN, Long Gen ZHU, N. M. Kostic

中国化学快报. 1996, 7(02): 127-128.

摘要 ( )

可视化

cis-[Pd(met)(D₂O)₂]²⁺ promoted hydrolysis of AcMet-Gly was monitored by ¹H NMR spectroscopy.The observed rate constants,k_oba,strongly depend on the mole ratio of cis-[Pd(met)(D₂O)₂]²⁺ to AcMet-Gly.At least,one aqua ligand for each Pd(Ⅱ)is necessary for fast hydrolysis reaction observed.Two aqua ligands of each Pd(Ⅱ) make the reaction faster.

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LIPASE-CATAL YZED DOUBLE KINETIC RESOLUTION OF DL-2,4-DIMETHYL-1,5-PENTANEDIOL:A USEFUL SYNTHON IN NATURAL PRODUCT SYNTHESIS

Jian Wen FANG, Zu Yi LI

中国化学快报. 1996, 7(02): 129-130.

摘要 ( )

可视化

An importment chiral synthon (-)-2,4-dimethyl-1,5-pentanediol and its diester and monoester were obtained by lipase-catalyzed double kinetic resolution.

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PREPARATION OF OLIGOSACCHARIDES FROM THE ENZYMATIC HYDROLYSATES OF KONJAC GLUCOMANNAN BY LOW-PRESSURE COLUMN CHROMATOGRAPHY

Gui Yun XU, Li Wen CHANG, Yan Mei XU, Yan He MA, Pei Jin ZHOU

中国化学快报. 1996, 7(02): 131-132.

摘要 ( )

可视化

Low pressure column chromatography with activated charcoal powder was used to separate the oligosaccharides and their isomers from the hydrolysates of konjac glucomannan.

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A NEW DITERPENE FROM SPIRAEA JAPONICA

Xin HONG, Jing Lue NIE, Xiao Jiang HAO

中国化学快报. 1996, 7(02): 133-134.

摘要 ( )

可视化

Further study on the components of Spiraea japonica var.incisa Yu,resulted in the isolation of a new diterpene spiramilactone,The structure of which was elucidated on the basis of spectral and chemical means.

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THE NEW DITERPENE ALKALOIDS FROM ACONITUM TRANSSECTUM

Li Ming GAO, Xiao Jiang HAO, Shang Zheng ZHAN, Xu Wei SHEN, Si Ying CHEN

中国化学快报. 1996, 7(02): 135-138.

摘要 ( )

可视化

Three new diterpene alkaloids,transconitine A,B and C were isolated from the roots of Aconitum transsectum Diels,and their structures were elucidated by spectral means.

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A NEW DITERPENOID ALKALOID FROM DELPHININUM CAERULEUM

Yan WANG, Yuan Jiang PAN, Shao Nong CHEN, Yao Zu CHEN

中国化学快报. 1996, 7(02): 139-140.

摘要 ( )

可视化

A new minor diterpenoid alkaloid contaning a C(19)-N-azomethine group,caerunine (1) was isolated from Delphinium caeruleum Jacq.ex.Cambss,its struture was determined by spectral data.

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NEOLIGNAN GLUCOSIDES FROM PEDICULARIS LONGIFLORA

Chang Zeng WANG, Zhong Jian JIA

中国化学快报. 1996, 7(02): 141-144.

摘要 ( )

可视化

Two new neolignan glucosides,longiflorosides A and B were isolated from whole plants of Pedicularis longiflora.On the basis of spectral evidence,longiflorosides A and B were determined as (7R,8S)-4-O-methyl-dehydrodiconiferyl alcohol-9'-O-β-D-glucopyranoside and (erythro)-1-(4-O-β-D-glucopyranosyl-3,5-dimethoxy-phenyl)-2-{2-methoxy-4-[1-(E)-propene-3-ol]-phenoxyl}-propane-1,3-diol,respectively.

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NEOLIGNAN GLUCOSIDES FROM PEDICULARIS TORTA

Chang Zeng WANG, Zhong Jian JIA

中国化学快报. 1996, 7(02): 145-148.

摘要 ( )

可视化

Two new neolignan glucosides,tortosides D and E were isolated from plants of Pedicularis toria.On the basis of spectral evidence,tortosides D and E were determined as (7R,8S)-dehydrodiconiferyl-9-O-β-D-4"-O-methyl-glucopyranoside and (7R,8S)-5-methoxy-dihydrodehydrodiconiferyl alcohol-9'-O-β-D-glucopyranoside,respectively.

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CYCLOPEPTIDES FROM STELLARIA DELAVAYI

Yu Rut ZHAO, Jun ZHOU, Xiang Kai WANG, Hou Ming WU, Xiao Lin HUANG

中国化学快报. 1996, 7(02): 149-152.

摘要 ( )

可视化

Further chemical study on Stellaria delavayi led to the isolation of two other new cyclopeptides,namely stelladelin B and C.On the basis of spectroscopic analysis and chemical evidence,their structures were established as cyclo(Gly-Ile-Pro₂-Pro₁-Ala-Tyr-Asp-Leu) and cylo(Val-Pro₃-Tyr₂-Pro₂-Pro₁-Phe-Tyr₁-Ser),respectively.

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CONFORMATION ANALYSIS OF TUNICAMYCIN V AND ITS NATURAL SUBSTRATE

Min Bo CHEN, Yu LIU, Zhong Wu GUO

中国化学快报. 1996, 7(02): 153-156.

摘要 ( )

可视化

Conformation analysis of the model compounds for tunicamycin V and its natural donor substrate,UDP-N-acetylglucose,is performed to reveal the detail of the inhibition process.

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THEORETICAL STUDIES ON THE INTRINSIC REACTION COORDINATE OF THE REACTION HCO+HNO₂→HCHO+NO₂

Xian Yong PANG, Yan WANG, Yong Ping YANG, Wen Lin FENG, Shao Wen ZhANG

中国化学快报. 1996, 7(02): 157-158.

摘要 ( )

可视化

The geometries of the reactants,the transition states(TS) and the products for the reaction HCO+HNO₂→HCHO+NO₂ have been optimized by using the energy gradient approach at UHF/6-31G level,and the energies were corrected at the MP2/6-31G level.The calculated barrier(48.15KJ·mol^-1) for the reaction is in reasonable agreement with the experimental data (28.84±2.51KJ·mol^-1).The Intrinsic Reaction Coordinate (IRC) for the reaction is traced by using Morokuma's magnitude method.The variations of the geometries and the potentials for the reaction system are elucidated along the IRC.

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HIGH-PERFORMANCE CAPILLARY ELECTROPHORESIS OF REDUCING OLIGOSACCHARIDES AS THEIR ETHYL P-AMINOBENZOATE DERIVATIVES

Li Wen CHANG, Qing GUO, Zhao Lou YU, Yi CHEN, An ZHU

中国化学快报. 1996, 7(02): 159-160.

摘要 ( )

可视化

A modified method for the separation of oligosaccharides derivatized with p-aminobenzoate ethyl ester by high performance capillary electrophoresis (HPCE) is described.The isomers of larger oligosaccharides up to 10-mers were separated by HPCE with borax as running buffer.

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DETERMINATION OF TRACE FLUORIDE AND MOLYBDENUM IN SERUM SAMPLE BY ELECTROCHEMICAL ANALYSIS

Li Zeng WANG, Xiao ZHANG, Yong YU, Cheng Song MA

中国化学快报. 1996, 7(02): 161-164.

摘要 ( )

可视化

In this paper,the determination of both fluoride and molybdenum can be carried out in the same serum sample as follows:the content of fluoride is determined by direct potentiometry in the solution containing (CH₂)₆N₄ and HNO₃ (pH=5.4) while that of molybdenum is determined by adsorptive voltammetry after the above-mentioned solution has been nitrified with mixed acid containing HNO₃ and HClO₄.

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CAN ADSORPTION BE STUDIED IN THE ELECTRODEPOTENTIAL RANGE OF SEVERE HYDROGEN EVOLUTION

Wu Hu Li, Shou Zhong ZOU, Bin REN, Zhong Qun TIAN

中国化学快报. 1996, 7(02): 165-166.

摘要 ( )

可视化

Surface enhanced Raman spectroscopy (SERS) has been applied to obtain structural information of surface species adsorbed at electrode surface in the electrode potential range of severe hydrogen evolution,which is very difficult to be gained by using most of spectroelectrochemical and conventional electrochemical methods.

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FABRICATION OF BIENZYME MALTOSE SENSOR USING MOLECULAR DEPOSITION TECHNIQUE

Chang Qing SUN, Xi ZHANG, Yi Peng SUN, Jia Cong SHEN

中国化学快报. 1996, 7(02): 167-168.

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可视化

A new kind of bienzyme maltose sensor was fabricated using molecular deposition technique,in which glucose oxidase and glucoamylase were alternatively deposited with bipolar quaternary ammonium salt on 3-mercapto propionic acid modified gold electrode.Its response performance is described in detail.

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OSCILLATION FREQUENCY THEORY OF A PIEZOELECTRIC SENSOR INLIQUID PHASE WITH TWO SEPARATED-ELECTRODES

Da Zhong SHEN, Ze Chang LIU, Qing KANG, Jind Tian HU

中国化学快报. 1996, 7(02): 169-172.

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可视化

In this paper,an oscillation frequency equation for a piezoelectric sensor with two separated-electrodes is theoretically derived and experimentally verified.The correlations of the oscillation frequency and the liquid properties are investigated.

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PHOTOINDUCED INTRAMOLECULAR CHARGE TRANSFER IN SELF-ASSEMBLY.1.AGGREGATION AND DUAL FLUORESCENCE OF ETHYL P-DIDECYLAMINOBENZOATE IN DIOXANE-WATER BINARY SOLVENT

Yun Bao JIANG

中国化学快报. 1996, 7(02): 173-176.

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可视化

Aggregation of ethyl p-didecylaminobenzoate (EDOAB) in dioxane-water binary mixture was shown to occur at water volume fraction of 0.47 and a strong intramolecular charge transfer emission was observed in the aggregate.

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ON THE STUDY OF SODIUM-P-NITROPHENOL COMPLEX

Pei Ju SUN, Wen Sheng GUO, Yang LU, Qi Tai ZHENG

中国化学快报. 1996, 7(02): 177-180.

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可视化

This paper reports a complex of sodium chloride with p-nitrophenol,which has not previously been published.The composition and formation constant of the complex have been studied by ion-selective electrode,crystal structure of the complex has been measured.#br#No complexes were formed for lithium and potassium.

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CRYSTAL CHEMISTRY STUDY ON PHENOLS PART 2. MOLECULAR PACING ANALYSIS

De Chun ZHANG, Yan Qiu ZHANG

中国化学快报. 1996, 7(02): 181-184.

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可视化

Intermolecular Hydrogen Bonding (HB) Patterns in 69 crystal structures of phenols and its simple derivatives were analysed by a non-graphic method automatically.Presented here are the results which are well consistent with the literature reports.

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A NEW METHOD FOR PREPARATION OF IRON(Ⅱ) PORPHYRIN COMPLEX-ISOLATION AND CHARACTERIZATION OF AMINE COMPLEX OF FERROUS PORPHYRIN

Xin Hua ZHONG, Yao Yu FENG, Jie Sheng HUANG, Pan Wen SHEN

中国化学快报. 1996, 7(02): 185-186.

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可视化

The six-coordinate complex [Fe(Ⅱ)(TPP)(NH₂Bu¹)₂] (TPP=mesotetraphenylporphyrinate) has been prepared by i-butylamine reduction method in the existence of antiformin in aerobic solution.The complex was characterized by UV-Vis spectroscopy,IR spectroscopy and elemental analysis.

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A NEW METHOD FOR PREPARATION OF IRON(Ⅲ) PORPHYRIN OXYANION COMPLEXES-SYNTHESIS OF PERCHLORATE(PORPHYINATO) IRON(Ⅲ)

Xin Hua ZHONG, Yao Yu FENG, Jie Sheng HUANG, Pan Wen SHEN

中国化学快报. 1996, 7(02): 187-188.

摘要 ( )

可视化

A new method for preparation of iron(Ⅲ) porphyrin oxyanion complexes was reported.By this method perchlorate complex of iron(Ⅲ) tetraphenylporphyrin [FeTTP(OClO₃)] was prepared from i-butylamine complex of iron(Ⅱ) porphyrin [Fe(TPP(NH₂Buⁱ)₂ by treatment with perchloric acid.

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PREPARATION OF HETEROBIMETALLIC COMPLEXES BRIDGING WITH π,π-BOUND PHENYLCYCLOPENTADIENYL LIGAND AND X-RAY CRYSTAL STRUCTURE OF (TRICARBONYL-π-CHROMIUM)PHENYLCYCLOPENTADIENYLCOBALT DICARBONYL

Chang Tao QIAN, Jian Hua GVO, Jie SUN

中国化学快报. 1996, 7(02): 189-192.

摘要 ( )

可视化

(Tricarbonyl-π-chromiurn)phenylcyclopentadienyl transition metal (Ti,Mo,Mn,Ru,Co) complexes have been synthesized.The crystal structure of (tricarbonyl-π-chromium)phenylcyclopentadienylcobalt dicarbonyl (3) was determined by X-ray diffraction:crystals are orthorhombic.space group P2₁2₁2₁,a=15.083(5),b=16.391(5),c=6.351(4) A,V=1570(1) A³ and Z=4.The phenyl ring and the cyclopentadienyl ring in the molecule are not coplanar (dihedral angle:25°).

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PREPARATION AND CHARACTERIZATON OF MICROPOROUS CATALYTIC MATERIALS WITH NARROW PORE DISTRIBUTION AND HIGHLY DISPERSED PALLADIUM

An Wu Li, Guo Xing XIONG, Hong Bin ZHAO, Jing Hua Gu, Shi Shan SHENG, Wei CUI, Lu Bin ZHENG

中国化学快报. 1996, 7(02): 193-194.

摘要 ( )

可视化

The catalyst Pd/γ-Al₂O₃ was prepared by modification of γ-AlOOH sol particles with the complex of palladium salt with sol-gel technique in this letter.The pore distribution of the support γ-Al₂O₃ was very narrow from nitrogen adsorption measurement and the palladium in the γ-Al₂O₃ was highly dispersed determined from hydrogen chemisorption experiment.

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THERMOSTABILITY OF LiCu₂O₂ AND LiCu₃O₃

Jian Hua LIN, Kai LI, Shen Kang RUAN, Miau Zeng SU, Eberhard SCHWEDA

中国化学快报. 1996, 7(02): 195-198.

摘要 ( )

可视化

Thermostability and phase transformation of LiCu₂O₂,LiCu₃O₃ and other related copper oxides have been studied by x-ray powder diffraction technique at high temperature in air.Both LiCu₂O₂ and LiCu₃O₃ are metastable at room temperature.LiCu₂O₂ decomposes to Li₂CuO₂ and a monoclinic phase with CuO structure,while LiCu₃O₃ transforms to the monoclinic phase at lower temperature.Moreover,evidence for a possible intermediate phase between LiCu₃O₃ and Li_0.25Cu_0.75O_0.85 has also been presented.

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PREPARATION AND CHARACTERIZATION OF NIOBIUM-CONTAINING DIMOLYBDO-15-TUNGSTODIPHOS-PHORIC SALT

Jian GONG, Lun Yu QU

中国化学快报. 1996, 7(02): 199-200.

摘要 ( )

可视化

Preparation of P₂W₁₅Mo₂NbO₆₂^7- was reported in the paper.It was characterized by elementry analysis,IR,UV,polarography,¹⁸³W-NMR and XPD spectra.All results showed the structure of the heteropoly anion was the Dawson type.

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ON SIMULTANEOUS SUBSTITUTION OF TI AND V INTO MCM-41 TYPE MOLECULAR SIEVE

Zhong Yong YUAN, Jing Zhong WANG, He Xuan LI

中国化学快报. 1996, 7(02): 201-204.

摘要 ( )

可视化

The new crystalline V-Ti-silicalite with mesoporous MCM-41 type molecular sieve structure is synthesized hydrothermally;The framework IR spectra associated with ESR,²⁹Si MAS NMR,DRS and XPS data shows that V and Ti are simultaneously incorporated into V-TiMCM-41 framework.

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1996年, 第7卷, 第02期　刊出日期：1996-02-20

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1996年, 第7卷, 第02期 刊出日期：1996-02-20

1996年, 第7卷, 第02期　刊出日期：1996-02-20