中国化学快报

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SYNTHESIS OF A NEW CHIRAL PHOSPHINE FROM DSORBITOL

An Lai WANG, Xiao Dong WANG, Shi Me LU, Hong Xiang FU, Han Qing WANG

中国化学快报. 1996, 7(04): 299-300.

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A new chiral phosphine compound:1,4:3,6-dianhydro-2-O-p-toluene sulfonyl-5-deoxy-5-diphenylphosphino-L-iditol was synthesized using D-sorbitol as starting material,and characterized by elemental analysis,¹H NMR,³¹P NMR,and MS.

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Stereospecific　synthesis　of　(E)-β-Trifluoroacetylvinyl　Handes　and　Their　Palladium-Catalyzed　Coupling　Reachon　with　Organozinc　Reagents

Xue Sheng MO, Yao Zeng HUANG

中国化学快报. 1996, 7(04): 301-302.

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可视化

The halogenation of (Z)-β-Trifluoroacetylvinyltelluride 1 leads to the unexpected pure (E)-β-trifluoroacetylvinyl halides 3,which are allowed to react with organozinc reagents 4 catalyzed by Pd (0) to furnish the corresponding (E)-α,β-unsaturated trifluoromethyl ketones 5 in good yields.

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FIRST SYNTHESIS OF(±)-3-[(5-HYDROXY)HOMOGERANYL]-△²-BUTENOLIDE

Jin QU, Wei Dong LI, Jing LI, Yu Lin LI

中国化学快报. 1996, 7(04): 303-304.

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可视化

A new farnesane-based sesquiterpene lactone,3-[(5-hydroxy)homogeranyl]-△²-butenolide,was synthesized for the first time starting from trans,trans-farnesol through five steps in an overall yield of 6.4% as its racemic form.

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THE　REACTION　OF　p-NITROPHENYLSULFONYLACETONITRILE　WITH　α,β-UNSATURATED　ESTERS　AND　NITRILES

Guo Ren YUE, Zheng Zhang

中国化学快报. 1996, 7(04): 305-308.

摘要 ( )

可视化

Michael addition and an unexpected tandem addition-rearrangement reaction occurred when p-nitrophenylsulfonylacetonitrile (1) reacted with α,β-unsaturated esters and nitriles (2a-f).Different products can be obtained depending on the particular reaction conditions chosen.All new produets (3 and 4,6) were characterized by spectroscopy.

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SYNTIIESIS OF 2-AMINO-5-THIO-THIADIAZOLINE β-D-RIBOFURANOSIDES

Yun Yan ZHANG, Yun DING, Yi Bing ZHANG, Yao Quan CHEN

中国化学快报. 1996, 7(04): 309-312.

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2-Amino-5-thio-1,3,4-thiadiazoline and 1-O-acetyl-2,3,5-tri-O-benzoylribofuranose were allowed to react by fusion or by the Vorbrüggen procedure.Two products were isolated and characterized to be positional isomers 4-(β-D-ribofuranosyl)-2-amino-5-thio-1,3,4-thiadiazoline and 3-(β-D-ribofuranosyl)-2-imino-5-thio-1,2,4-thiadiazoline by ¹H,¹³C NMR,mass spectra as well as crystallographic analysis.

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SYNTHESIS AND PROPERTIES OF SOME NEW POLYIMIDES CONTAINING BITHIAZOLE RINGS

Wei Lin SUN, Feng Cai LU

中国化学快报. 1996, 7(04): 313-316.

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Some new polyimides containing bithiazole rings were prepared by reacting 2,2'-diamino-4,4'-bisthiazole with different aromatic dianhydrides.The polyimides obtained had inherent viscosities of 0.37-0.82 dL/g.Thermogravimetric analysis of the polyimides showed good thermal stability,the temperature at 5% weight loss being from 450℃ to 560℃.The permeability of two polymer membranes to H₂,O₂ and N₂ was determined.

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A FACILE TOTAL SYNTHESIS OF 6-PENTYL-α-PYRONE

Chi ZHANG, Xue Chao WANG, Fang Ning ZHANG, Xin Fu PAN

中国化学快报. 1996, 7(04): 317-318.

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可视化

A facile total synthesis of 6-pentyl-α-pyrone 1 has been described.The key step is the treatment of 2-furyl-pentyl-carbinol 3 with NBS in aqueous tetrahydrofuran (THF).The overall yield is 34%.

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A SIMPLE SYNTHESIS OF (+)-ACETYLGONIOTRIOL

Zhi Cai YANG, Wei Shan ZHOU

中国化学快报. 1996, 7(04): 319-320.

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A simple synthesis of one of natural antitumour styryl lactones,(+)-acetylgoniotriol (1),was achieved utilizing the chiral furylmethanol 3 as a key intermediate.

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A CONVENIENT AND EFFICIENT SYNTHESIS OF BIS-IMIDAZOLES

Cheng He ZHOU, Sheng Jin GUO, Ru Gang XIE, Hua Ming ZHAO

中国化学快报. 1996, 7(04): 321-324.

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A simple,convenient and high-yield preparation for bis-imidazoles,which have a wide range of applications,from imidazole and dibromides in the presence of strong base is reported.

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SYNTHESIS　AND　CHARACTERIZATION　OF　NEIV　PICKET　FENCE　CROWN-PORPHYRIN　AND　ITS　Zn(Ⅱ),Fe(Ⅲ)　COMIPLEXES

Yang Je WU, Fa Cheng QIAN, Lian Fang SHEN

中国化学快报. 1996, 7(04): 325-328.

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A new picket fence porphyrin appended with multiple benzo-15-crown-5 units was synthesized by the reaction of meso-α,α,α,α-tetra (2-aminophenyl) porphyrin and 4'-chlorofortnylbenzo-15-crown-5.Its Fe (Ⅲ) and Zn (Ⅱ) complexes were also prepared and characterized.

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EPOXIDATION　OF　OLEFINS　WITH　IODOSYLBENZENE　CATALYZED　BY　POLYMER-SUPPORTED　MANGANESE　PORPHYRINS

Jing Song YOU, Xiao Qi YU, You Fa XIAO, Yi Liang WU, Zhong Wei LAN

中国化学快报. 1996, 7(04): 329-332.

摘要 ( )

可视化

Polymer-bound manganese (Ⅱ) porphyrins are effective catalysts for the epoxidation of olefins by iodosylbenzene.

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SCUTEBARSATINE　A,　A　NEW　NEOCLERODANE-TYPE　DITERPENOID　ALKALOID　FROM　SCUTELLARIA　BARBATA

Zhao Quan WANG, Feng Ming XU, Xian Zhong YAN, Yuan ZHU

中国化学快报. 1996, 7(04): 333-334.

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可视化

A new neoclerodane type diterpenoid alkaloid,scutebarbatine A,was isolated from the whole plants of Scutellaria bartata D.Don.On the basis of the spectral evidence,its structure was proposed as (1).This type of alkaloid was first discovered in natural products.

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DUCHESIDE A,A NEW ELLAGIC GLYCOSIDE FROM DUCHESNEA INDICA FOCKE

Liang YE, Jun Shan YANG

中国化学快报. 1996, 7(04): 335-336.

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A new ellagic acid glycoside named ducheside A has been isolated from Duchesnea indica Focke,and its structure was elucidated as 3'-0-methyl-ellagic acid-4-0-β-D-xylopyranoside on the basis of spectral analysis and hydrolysis.

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ISOLATION　AND　DETERMINATION　OF　A　GROUP　OF　OLIGOPEPTIDES　RELATED　TO　GLUTATHIONE　FROM　PANAX　GINSENG

Zlii Kuan CHEN, Yun Hua VE, Qi Yi XING

中国化学快报. 1996, 7(04): 337-340.

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Oligopeptides related to oxidized glutathione were isolated from aqueous methanol extract of Panax ginseng,through successive column chromatography on ion-exchange,gel-filtration and HPLC.Their structures had been identified with the methods of amino acid component analysis,N-terminal,C-terminal analysis and sequence analysis.

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FOUR NEW GLYCOSIDES, LIGUROBUSTOSIDES A, B, C AND D FROM LIGUSTRUM ROBUSTUM

Jun TIAN, Hong Jic ZHANG, Han Dong SUN Lu Tai PAN, Pin YAO, Dc Yuan

中国化学快报. 1996, 7(04): 341-344.

摘要 ( )

可视化

Four new glycosides named ligurobustosides A,B,C and D have been isolated from Ligustrum robustum and their structures identifled as geraniol 3-O-α-L-rhamnopyranosyl-β-D-glucopyranoside (1),geraniol 3-O-α-L-rhamnopyranosyl-4-cafferoyl-β-D-glucopyranoside (2),geraniol 3-O-α-L-rhamnopyranosyl-4-trans-P-coumaroyl-β-D-glucopyranoside (3)and geraniol 3-O-α-L-rhamnopyranosyl-4-cis-P-coumaroyl-β-D-glucopyranoside(4),respectively.

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IDENTIFICATION OF A METABOLITE OF BIPHENYLDIMETHYLDICARBOXYLE IN HUMAN URINE

Ya Wei LI, Xiu Yuan ZHU

中国化学快报. 1996, 7(04): 345-346.

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可视化

The metabolism of biphenyldimethyldicarboxylate (BDD),an antihepatitis drug,was studied in human urine by deuterium labeled compound and GC-MS.It was found that the metabolite is mono-O-demethylated BDD,which confirmed the results of previous studies in rats.

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MICELLAR　ELECTROKINETIC　CAPILLARY　CHROMATOGRAPHIC　SEPPATION　OF　PYRIMIDINE　AND　PURINE　DERIVATIVES

Zhou Bin YUAN, Yong CHEN Ping, REN Feng, Mei HAN

中国化学快报. 1996, 7(04): 347-350.

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可视化

The retention behaviours of 12 purine and pyrimidine derivatives——thymine,uracil,cytosine,adenine,guanine,xanthine,hypoxanthine,purine,4,6-diaminopyrimidine,theophylline,trimethoprimum and 6-(benzylamino) purine,have been studied by micellar eiectrokinetic capillary chromatography (MECC).10 out of 12 analytes were separated by using 40 mmol/L sodium dodecyl sulfate-10 mmol/L borax-17% methanol-3.0 mmol/L β-cyclddextrin (pH 9.30) as electrolyte.The relative standard deviations (RSD) of t_R and UV absorbance were less than 1.8% and 6.5% (n=6),respectively.

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A　COMPARATIVE　STUDY　ON　THE　PHOTOVOLTAIC　PROPERTIES　OF　BUCKMINSTERFULLERENE　(C60)　AND　ITS　ANION　SALT

Zhan Jun YU, Peng ZHANG, Lin Song LI, De Jun WANG, Wen Sheng GUO, Tie Jin LI

中国化学快报. 1996, 7(04): 351-352.

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Measurements of Surface Photovoltage Spectroscopy (SPS) Were carried out for C60 (A) and its anion salt (B) for the first time.With a reference of UV-vis spectra,the results for SPS are discussed in terms of Molecular Orbit (MO) and Surface Photovoltage (SPV) theory.By a comparison between (A) and(B)'s characteristic responses is SPS,a deeper insight into the nature of their photovoltaic properties is obtained.

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THE　THEORY　OF　RESONANT　AND　NONRESONANT　PUMP-PROBE　POLARIZATION SPECTROSCOPY FOR GROUND-STATE COHERENCE

Yi ZHAO, Guo Zhong HE

中国化学快报. 1996, 7(04): 353-356.

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A density matrix treatment of the time evolution of the third order polarization response describing the ground state coherence induced by ultrafast pulses is given.The explicit formulas of polarization response for nonresonant and resonant excitation are derived.The results show that the signal can be greatly enhanced in case of resonance.For specification,we discuss the ground-state rotational coherence based on the irreducible tensor algebra.

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ENTHALPY-ENTROPY　COMPENSATION　IN　THE　INCLUSION　OF　1-SUBSTITUTED　NAPHTHALENES　BY　β-CYCLODEXTRIN　IN　WATER

Qing Xiang GUO, Xiao Qi ZHENG, Shuang Hui LUO, You Cheng LIU

中国化学快报. 1996, 7(04): 357-360.

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可视化

The association constants (K_a),free energy (△G⁰),enthalpy (△H⁰)and entropy (△S⁰)changes were determined for the inclusion complexation of β-cyclodextrin with a series of 1-substituted naphthalenes in aqueous solution.The △H⁰-T△S⁰ plot for the β-cyclodextrin complexes with naphthalene derivatives show a linear relationship with slope of 0.98 and intercept of 14.67.The results were discussed in terms of enthalpy-entropy compensation.

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THE MONITORING FOR PHYSICAL DEVELOPING PROCESS WITH A LINEAR CCD

Jing Kun XU, Ping CHEN, Li ZHANG, De Shui ZHENG

中国化学快报. 1996, 7(04): 361-364.

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In this work,we used a linear CCD to detect the whole physical developing process of silver diffusion transfer reversal process in photographic chemistry.The influence of the ingredient of the working solution was studied.

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APPLICATIONS OF FAST SIMULATED ANNEALING IN NEURAL NETWORKS

Yi Lin CAO, Qing Zhang LU, Shu Ting YANG, Hong Lin LIU

中国化学快报. 1996, 7(04): 365-366.

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Fast simulated annealing is implemented into the learning process of neural network to replace the traditional back-propagation algorithm.The new procedure exhibits performance fast in learning and accurate in prediction compared to the traditional neural networks:Two numerical data sets were used to illustrate its use in chemistry.

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SYNTHESIS　OF　BLOCK　COPOLYMERS　OF　STYRENE　AND　N-(p-SUBSTITUTED　PHENYL)　MALEIMIDES　BY　ANIONIC　POLYMERIZATION

Shou Jun XU, Kun Yuan QIU

中国化学快报. 1996, 7(04): 367-370.

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The block copolymers were synthesized by anionic polymerization via two steps reaction.First,styrene was initiated by n-butyl lithium,then maleimides were added into the living styrene system to obtain block copolymers.¹H-NMR and FT-IR measurements indicated that block copolymers had been formed.From the results of thermogravimetric analysis,it could be concluded that the block copolymer had a much better thermal stability than random copolymers prepared by radical polymerization.Also the surface hydrophilicities of the two kinds of copolymers were compared.

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STUDIES　ON　THE　AGGRESGATION　BEHAVIOUR　OF　A　SIDE-CHAIN　LIQUID　CRYSTALLINE　POLYMER　IN　LANGMUIR-BLODGETT　FILMS

Xiao CHEN, QingBin XUE, Kong Zhang YANG, Qi Zhen ZHANG

中国化学快报. 1996, 7(04): 371-374.

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The aggregation behavior of a side chain liquid crystalline polymer (PSLC) has been investigated by means of surface pressure-area isotherm,TEM and SEM observation,X-ray diffraction,and UV-vis spectroscopy.Results obtained can be explained by molecular exciton model.

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SYNTHESIS AND CHARACTERIZATION OF POLYURETHANE LATEX

Qing Ye ZHOU, Han LI, Mou Dao SONG, Bang Hua ZHANG, Bing Lin HE

中国化学快报. 1996, 7(04): 375-376.

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A method of preparing stable,film-forming polyurethane latices without the use of emulsifying agents is described in this article.The reaction of polypropylene glycol with a stoichiometric ratio (NCO:OH=2:1) of tolylene-diisocyanate in the presence of ketones and catalyst produces an isocyanate terminated prepolymer.Then addition of diethylene glycol as chain extender to prepolymer solution can yield a relatively high molecular weight poly (urethane-ether) which is readily dispersed with aqueous tartaric acid after tartaric acid and water diffuse into the suspended globules of the latex and produces the chain extended urethane.A linear or crosslinked high molecular weight self-emulsifiable polyurcthane can be obtained due to the reaction of the hydroxy group of tartaric acid and little water with isocyanate endgroups.The results of FTIR also show that an expected polyurethane emulsion has been successfully synthesized.

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AQUEOUS　PHASE　RHODIUM　HYDROFORMYLATION　OF　DODECENE-1　WITH　SURFACE　ACTIVE　WATER-SOLUBLE　PHOSPHINE

Yuan Yong YAN, Huan Pei ZUO, Zi Lin JIN

中国化学快报. 1996, 7(04): 377-380.

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The surface active water-soluble phosphine,P[p-C₆H₄O(CH₂CH₂O)_nH]₃,n=4,is used to generate an aqueous rhodium catalyst for the hydroformylation of dodecene-1.Under 100℃,5.0 MPa (CO/H₂=1:1),pH=6.5,and reaction time 4h,the conversion of dodecene-1 was 96.0%,the yield for aldehyde was 84.0%,and n/i=1.8.The catalyst can be reused for more than four times without any appreciable loss in activity and selectivity.

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STUDY　ON　REACTION　OF　(μ₃-CCO₂Et) CO₂M (CO)₈ (CpMe) (M=Mo,W)　WITH　Na₂[Fe(CO)₄]．SYNTHESIS　OF　TWO　KINDS　OF　THE　NOVEL　CLUSTERS　EtO_{2_{CCFeCoM (CO)₈(CpMe) H　AND　(OCC)FeCoM (CO)₈ (CpMe)}}

He Ping WU, Er Run DING, Yuan Qi YIN, Xiao Ying HUANG, cKai Bei YU

中国化学快报. 1996, 7(04): 381-384.

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可视化

The reactions of clusters (μ₃-CCO₂Et) Co₂M (CO)₅ (MeCp) [M=Mo (2a),W (2b)],derived from the reaction of (μ₃-CCO₂Et) Co₃ (CO)₉ with Na [M (CO)₃ (MeCp)],with Na₂ [Fe (CO)₄] in THF at reflux not only gave the expected metal fragment exchange products (μ₃-CCO₂Et) FeCoM (CO)₆ (Me-Cp) H [M=Mo (3a),W (3b)] but also produced the unexpected compounds (μ₃-CCO) FeCoM (CO)₅ (MeCp) [M=Mo (4a),W (4b)].It is suggested that the formation of two kinds of compounds resulted from two competitive reactions of the intermediates [(μ₃-CCO₂Et)FeCoM (CO)₅(MeCp)] with H⁺:the one is the protonic reaction of the intermediate giving the cluster 3a,b;the another one is the intermolecular nucleophilic substitution reaction of the intermediate under the H⁺ catalytic action giving the cluster 4a,b.

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A　NOVEL　REACTION　BETWEEN　Ge-Ge　AND　Fe-Fe　BONDS　IN　COMPLEX　(Me₂GeGeMe₂)[(η⁵-C₅H₄)Fe(CO)]₂(μ-CO)₂　AND　CRYSTAL　STRUCTURE　OF　THE　PRODUCT

Xiu Zhong ZHOU, Wen Hua XIE, Shan Sheng XU

中国化学快报. 1996, 7(04): 385-386.

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可视化

(Me₂GeGeMe₂) [(η₅-C₅H₄)Fe(CO)]₂ (μ-CO)₂,1 undergoes a novel reaction between its Ge-Ge and Fe-Fe bonds,forming a rearrangement product with a new cyclic structure,(Me₂Ge(η⁵-C₅H₄)Fe(CO)₂]₂,2,which was determined by single crystal X-ray diffraction.

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PROPERTIES　OF　(Y．Gd)　BO₃:　Eu³⁺PHOSPHORS　SYNTHESIZED　BY　MICROWAVE　HEATING　METHOD

Yuan Ying LI, Ming Li PENG, Shou Hua FENG

中国化学快报. 1996, 7(04): 387-388.

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可视化

In this paper we have synthesized powder crystal form (Y,Gd) BO₃:Eu³⁺phosphors by microwave heating method.Its structure belongs to hexagonal system with lattice parameters a=0.3796,c=0.8835.Its excitation spectra peaks at 239.0nm and 240.0nm monitored at the emission of 589nm and 612nm respectively,the half peak width is 40nm.Under 240nm excitation the phosphors show a strong orange-red luminescence,the fluorescent intensity ratio for I₅₈₉/I₆₁₂ is 1.9/1

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CARBON MATERIALS FOR LITHIUM ION BATTERIES

Shu Hua MA, Ji LI, Xia Bin JING, Fo Song WANG

中国化学快报. 1996, 7(04): 389-390.

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可视化

The preliminary work indicated that passive film is the most important factor influencing cell performance of carbon anode,and the carbon and solvent used govern cell performance by forming the passive film of different properties.A in situ XRD result is also presented.

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PREPARTION　OF　QUANTUM　SIZED　CdSe　NANOCRYSTALLINE　FILMS　BY　CHEMICAL　SOLUTION　DEPOSITION

Xiao Wen ZHOU, Xu Rui XIAO, Xue Ping LI

中国化学快报. 1996, 7(04): 391-392.

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可视化

Chemical solution deposited CdSe particulate films possess nanocrvstalline structure and exhibit quantum size effects.By changing the temperature of chemical deposition and subsequent annealing,CdSe particulate films with different particle sizes can be obtained.

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1996年, 第7卷, 第04期　刊出日期：1996-04-20

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1996年, 第7卷, 第04期 刊出日期：1996-04-20

1996年, 第7卷, 第04期　刊出日期：1996-04-20