中国化学快报

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CO₂ Adducts of the Amino and Imino Groups Studied by ¹HNMR and ¹³CNMR

Zhen CHEN, Ren Yun WANG, Li Lian ZHU, Xiao Tian LIANG

中国化学快报. 2001, 12(04): 283-286.

摘要 ( )

可视化

CO₂ adducts of L-(+)-asparaginic acid and some polyhydroxylated alkaloids was studied by ¹HNMR and ¹³CNMR in this paper.

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Dehalogenation of Aryl Halides Catalyzed by MontK10 Immobilized PVP-Pd-Sn Catalyst in Aqueous System

Xiao Li ZHEN, Jian Rong HAN, Ru Hong KANG, Xing Mei OUYANG

中国化学快报. 2001, 12(04): 287-290.

摘要 ( )

可视化

A series of PVP-Pd-Sn/MontK10 catalysts were prepared by immobilization of PVP [poly (N-vinyl-2-pyrrolidone)] supported bimetallic catalyst using MontK10 as carrier. This catalyst has good catalytic activity for hydrogen transfer dehalogenation of aryl halides. The catalytic reaction was carried out in aqueous system in the presence of phase transfer catalyst and sodium formate as hydrogen source. The catalyst with loading Pd 0.19wt% and molar ratio of Pd/Sn 8:1 gives the highest activity and good stability. This catalyst is more reducible with NaBH₄. It is also found that the catalyst is easily separated from the reaction system.

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Baker's Yeast Mediated Reduction of Optically Active Diketone

Xiao Lei GAO, Gang ZHOU, Yu Kun GUAN, Wei Dong LI, Yu Lin LI

中国化学快报. 2001, 12(04): 291-292.

摘要 ( )

可视化

Baker's Yeast mediated reduction of optically active diketone has been described.

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Studies on New Additions to 5-Methoxy-2 (5H)-Furanone:1, 4-Addition of Grignard Reagents, and 1,3-Dipolar Cycloaddition of Silyl Nitronates

Zhao Yang WANG, Jia Ling CUI, Bao Shan DU, Qing Hua CHEN

中国化学快报. 2001, 12(04): 293-296.

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可视化

1,4-Addition reaction of Grignard's reagent to 5-methoxy-2 (5H)-furanone 1 was accomplished, which provided a new possible route for synthesizing β-alkyl-γ-alkyloxy-γ-butyrolactone. A novel concise method of preparing fused heterocyclic compounds was offered by 1,3-dipolar cycloaddition reaction of silyl nitronates to 1.

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Synthesis of Novel Diterpenequinone Salvicine from Ferruginol

Xin CHEN, Jin Sheng ZHANG, Ming ZHAO

中国化学快报. 2001, 12(04): 297-300.

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可视化

An efficient synthetic route has developed to the antitumor compound salvicine via 9 steps from ferruginol. The key reaction is the rearrangement of the angular methyl group of compound 7 to 4,5-seco-5,10,-friedo-abieta diterpene 8.

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A Novel Synthesis of Some Hexasubstituted Cyclotriphosphazenes

Cheng Feng YE, Ze Fu ZHANG, Wei Min LIU

中国化学快报. 2001, 12(04): 301-304.

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Some known and new hexaaryloxyphosphazene N₃P₃ (O-C₆H₄-R)₆] (R=H, CH₃, OCH₃, C(CH₃)₃, CHO, F, C₆H₅COOR, etc) were readily obtained with ca. 70% isolated yield in refluxing acetonitrile in the presence of anhydrous potassium phosphate. All compounds were characterized by means of elemental analysis,¹H-NMR,³¹P-NMR spectroscopy.

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Lipase-catalyzed hydrolysis of methyl-3-phenylglycidate

Guo Jun ZHENG, Jian Jun WANG, Tian Rui REN, Liu YANG, Wan Ru SUN

中国化学快报. 2001, 12(04): 305-306.

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可视化

The enzymatic resolution of racemic methyl 3-phenylglycidate was investigated. It was found that the hydrolysis rate of (2S, 3R)-enantiomer was faster than that of (2R, 3S)-enantiomer by a new lipase. At optimal condition 96% of (2R, 3S)-methyl phenylglycidate with ee of 100% was recovered from the racemic mixture.

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Photochemical Reduction of Aromatic Imines by 2-Phenyl-N, N-dimethylbenzimidazoline

Mei Zhong JIN, Li YANG, Long Ming WU, You Chen LIU, Zhong Li LIU

中国化学快报. 2001, 12(04): 307-308.

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可视化

A series of aromatic imines were reduced to corresponding amines in excellent yields by 2-phenyl-N, N-dimethylbenzimidazoline (PDMBI) photochemically in the presence of magnesium perchloride (Mg(ClO₄)₂). A Mg²⁺ mediated photoinduced electron transfer mechanism was proposed.

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Effect of Reaction Media on Photoreaction of Provitamin D₃

Yun Yan GAO, Yong Yong LIU, Bo Jie WANG, Bao Wen ZHANG, Yi LI

中国化学快报. 2001, 12(04): 309-312.

摘要 ( )

可视化

The photoisomerization of provitamin D₃ is carried out in silica gel-hexane matrix, ethanol and hexane. The results show that in silica gel-hexane matrix and ethanol, the desired product of prevtamin D₃ and vitamin D₃ can be obtained in high yield, while the undesirable byproducts are greatly limited.

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Oligouridylates Formation with N-(O,O'-Diisopropyl)-Phosphoryl Alanine in the presence of Poly (β-(N⁷-Adeninyl) Ethyl Methacrylate)

Hong Qi XIANG, Jian Jun HU, Yang JIANG, Yu Fen ZHAO

中国化学快报. 2001, 12(04): 313-316.

摘要 ( )

可视化

The oligouridylates formation with N-(O,O-diisopropyl)-phosphoryl alanine in the presence of poly(β-(N⁷-adeninyl)ethyl methacrylate) was studied. An increased yield by the presence of the polymeric nucleic acid analog was confirmed by anion exchange column HPLC, C18 reverse phase HPLC, and turbo ionspray MS.

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Study on the Structure of Supramolecular Inclusion Complex of β-Cyclodextrin with Retinoic Acid

Yan Ling ZHANG, Wei Sheng LIU, Yang LI, Xue Yi MA, Yao Zu CHEN

中国化学快报. 2001, 12(04): 317-320.

摘要 ( )

可视化

Inclusion compound of retinoic acid with β-cyclodextrin was prepared by coprecipitating method, the structure of resulting product was studied by elemental analysis, differential scanning caloriemetry (DSC) analysis, FT-IR spectroscopy and X-ray diffractometry, and the formed supramolecule self-assembles in aqueous solution according to molar ratio 2:1 of host-guest.

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The Microwave-assisted Preparation and X-Ray Structure of 3-Bromocarbazole-N-Acetic Acid

Wen Jian LAO, Yu Hua ZHANG, Yue Qi LIU, Qiang Jin WU, Zi Xiang HUANG, Qing Yu OU

中国化学快报. 2001, 12(04): 321-324.

摘要 ( )

可视化

The rapid synthesis of 3-bromocarbazole-N-acetic acid was performed using microwave irradiation. Under the optimal conditions the yield was 85.6%. The crystal structure showed that the carboxylic groups form bifurcated hydrogen bonds and the hydroxyl oxygen atoms serve as proton donors and also acceptor. Each carboxylic group was involved in four hydrogen bonds. The packing of crystal was dominated by links of these hydrogen bonds.

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Synthesis and Characterization of Soluble Reactive Copoly (aryl ether ketone ketone)

Yan GAO, Xi Gao JIAN, Zhi Yong XU, Yue GAO, Qian Jiang LÜ

中国化学快报. 2001, 12(04): 325-326.

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可视化

Soluble reactive copoly (aryl ether ketone ketone) was synthesized from the condensation of 2,2',3,3',6,6'-hexaphenyl-4,4'-diphenol, 2,2-p-hydroxyphenyl-iso-propane, and 1-methyl-cyclohex-1-ene-4,5-diyl-bis (4-fluorophenyl methanone). FT-IR, DSC and TGA were used to characterize the novel polymer.

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Structural Revision of Isovalertatins D03 and D23 Isolated from the Culture Filtrate of Streptomyces luteogriseus

Duan Yun SI, Da Fang ZHONG, Wen Yi HE, Li Mei ZHAO

中国化学快报. 2001, 12(04): 327-330.

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可视化

Two aminooligosaccharides, isovalertatins D03 (1) and D23 (2), were isolated from the culture filtrate of Streptomyces luteogriseus. Their structures were reinvestigated and revised by spectroscopic evidences including ESI multistage mass spectrometry and 2-dimensional NMR techniques.

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Saikosaponin v-2 from Bupleurum chinense

Hong LIANG, Yan Jun CUI, Yu Ying ZHAO, Bin WANG, Wen Xiu YANG, Yi YU

中国化学快报. 2001, 12(04): 331-332.

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可视化

Saikosaponin v-2 (1), was isolated from the roots of the title plant and the structure was identified on the basis of spectral analysis. Saikosaponin v-2 is a new compound, which was identified as 3β,16α,23,28-tetrahydroxy-olean-11,13 (18)-dien-30-oic acid-3-O-β-D-glucopyrano-syl-(1→2) glucopyranosyl-(1→3)-β-D-fucopyranosyl-30-O-xylitol ester.

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Two New Compounds from Melanosciadum pimpinelloideum H. Boiss

Yi ZHOU, Guo Lin ZHANG, Bo Gang LI, Yao Zu CHEN

中国化学快报. 2001, 12(04): 333-334.

摘要 ( )

可视化

Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl) ethanol, were isolated from the whole plants of Melanosoiadum pimpinelloideum H. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1,2-ethanediol, tymine, cimifugin, umtatin, bergenin, daucosterol and stigmasterol. Their structures were determined on the basis of spectral data.

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A New p-Terphenyl Derivative from Basidiomycetes Boletopsis grisea

Lin HU, Ze Jun DON, Ji Kai LIU

中国化学快报. 2001, 12(04): 335-336.

摘要 ( )

可视化

A new p-terphenyl derivative 1 was isolated from the fruiting bodies of Boletopsis grisea. Its structure was established as 2, 3-diacetoxy-4', 4'', 5, 6-tetrahydroxy-p-terphenyl by spectroscopic and chemical means.

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A New Quinolizidine Alkaloid from Boehmeria siamensis

Ying Gang LUO, Bo Gang LI, Guo Lin ZHANG

中国化学快报. 2001, 12(04): 337-338.

摘要 ( )

可视化

A new quinolizidine alkaloid, 3-(4-hydroxyphenyl)-4-(3-methoxy-4-hydroxyphenyl)-3, 4-dehydroquinolizidine (1), was isolated from the ethanol extract of the whole plants of Boehmeria siamensis Craib. Its structure was elucidated on the analysis of 1D NMR and 2D NMR spectrum.

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The Diterpenoid Quinones from Coleus forskohlii

Chun Suo YAO, Yun Long XU

中国化学快报. 2001, 12(04): 339-342.

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可视化

Two new diterpenoid quinones, coleon S and T were isolated from the chloroform extract of the leaves of Coleus forskohlii, and based on spectroscopic data, their structures were identified as 1,4-phenathrenedione-4b,5,6,8a,9,10-hexahydro-3,9b,10a-trihydroxy-4b,7,8-rimethyl-2-(2-ethoxypropyl) (1) and 1,4-phenathrenedione-2,3,4b,5,6, 8a,9,10-octahydro-3,9β,10α-tri-hydroxy-4b,7,8-trimethyl-2-propylene(2), respectively.

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A New Monoterpene Glucoside from the Leaves of Betula platyphylla Suk.

Su Juan WANG, Yue Hu PEI, Hui Ming HUA

中国化学快报. 2001, 12(04): 343-344.

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A new monoterpene glucoside, (2E,6Z)-2,6-dimethyl-8-β-D-glucosyloxy-2,6-octadien-oic acid, was isolated from the leaves of Betula platyphylla Suk. The structure was established by spectroscopic data.

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A New 24, 30-Dinortriterpenoid from Paeonia delavayi

Shao Hua WU, Xiao Dong LUO, Yun Bao MA, Xiao Jiang HAO, Da Gang WU

中国化学快报. 2001, 12(04): 345-346.

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可视化

A new triterpenoid, 3β, 4β, 23-trihydroxy-24, 30-dinorolean-12, 20 (29)-dien-28-oic acid, together with five known compounds, 2α, 3β, 23-trihydroxy-12-oleanen-28-oic acid-b-D-glucopyranosyl ester, palbinone, 2-hydroxy-benzoic acid, vanillic acid, syringic acid, were isolated from the roots of Paeonia delavayi Franch. Their structures were characterized by spectral analysis.

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DFT Calculations for Electron Transfer Bond-breaking Reaction of CH₃-X

Yu Mei XING, Zheng Yu ZHOU, Ben Ni DU

中国化学快报. 2001, 12(04): 347-350.

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可视化

DFT/6-311+g^** level calculations are performed to study the electron transfer bond-breaking reaction of CH₃-X. The calculated values are in good agreement with the experimental results or the empirical model. Through analyzing the change of the energy and the charge density along the reaction path, the bond-breaking in ET reaction for CH₃X is investigated.

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Cosolvent Effect on the Tautomerism of Ethyl Acetoacetate in Supercritical CO₂

Hong Ping LI, Hai Fei ZHANG, Jun LIU, Bu Xing HAN

中国化学快报. 2001, 12(04): 351-352.

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The effect of cosolvent cyclohexane, chloroform, and acetonitrile on the keto-enol tautomeric equilibrium of ethyl acetoacetate in supercritical CO₂ was studied by UV-Vis spectroscopy over the pressure range from 76 to 110 bar at 308.15 K. It was found that the equilibrium constant decreases with increasing polarity of the cosolvents.

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Solid State NMR Study of Polystyrene Nanolatex Particles(I) ¹³C Spin-Lattice Relaxation Time

Ya Lin TANG, Xiao Zhong QU, Liu Sheng CHEN, Xi Gao JIN

中国化学快报. 2001, 12(04): 353-354.

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¹³C spin-lattice relaxtion times for polystyrene nanolatex particles have been investigated. It was found that the dramatic increase at 80℃ annealing temperature is well below the Tg temperature of bulk polystyrene, the increase of relaxation time of aromatic carbons is larger than that of for aliphatic carbons at transition annealing temperature.

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Enantiomeric Separation of Amino Alcohols by Ion-pair Chromatography

Ming Hua HU, Xiu Zhu XU

中国化学快报. 2001, 12(04): 355-356.

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Enantiomers of four amino alcohols were resolved by ion-pair chromatography with (+)-10-camphorsulphonic acid as chiral counter ion. Studies of the influence of the mobile phase composition, the solute structure and the mobile phase flow-rate on separation are presented. Under the optimized conditions, enantiomeric propranolol, norephedrine, metropolol and salbutamol were separated using dichloromethane-1-pentanol (97:3, v/v) as mobile phase on Lichrospher-100-DIOL column.

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Determination of Enantiomeric Purity of n-Pyrrolidinyl Phenylpropanol by Capillary Electrophoresis Using β-Cyclodextrin Polymer as Chiral Selector

Tong WU, Xin ZHOU, Jia Hua CHEN, Jun Ling GU, Ruo Nong FU

中国化学快报. 2001, 12(04): 357-358.

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可视化

Enantiomer of n-pyrrolidinyl phenylpropanol was studied by capillary electrophoresis using β-cyclodextrin polymer as chiral selector. We determined the enantiomeric excess value of n-pyrrolidinyl phenylpropanol with RSD 0.48%.

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Studies on The Adsorption Capacity for Bilirubin of The Adsorbent Chitosan-β-Cyclodextrin

Wei Liang XU, Chun Ling FU, Jun LI

中国化学快报. 2001, 12(04): 359-362.

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可视化

The adsorbent crosslinked chitosan-β-cyclodextrin (β-CD) was prepared by the reaction of glutaraldehyde with chitosan and β-cyclodextrin. This type of adsorbent has high adsorption capacity for unconjugated bilirubin. The adsorption capacity was related to the β-CD content of the adsorbent; phosphate buffer concentration; temperature; pH value; ionic strength and the adsorbent beads. The results indicated that the chitosan-β-CD was a good adsorbent for unconjugated bilirubin with high capacity.

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Study of Oxidation of Glutathione by Capillary Electrophoresis

Xian LUO, Jian De LU, Xiao Yun FU

中国化学快报. 2001, 12(04): 363-364.

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可视化

A capillary electrophoresis method for the separation and quantification of reduced glutathione (GSH) and oxidized glutathione (GSSG) was developed. A baseline separation was achieved within five minutes. The effects of time and the concentrations of hydrogen peroxide (H₂O₂) on the oxidation of GSH were investigated.

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Deconvolution Method for Determination of the Nitrogen Content in Cellulose Carbamates

Guang Mei CHEN, Yi Ping HUANG

中国化学快报. 2001, 12(04): 365-368.

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可视化

Cellulose carbamates (CC) were synthesized with microcrystalline cellulose as raw materials. The Fourier transform infrared spectra of CC with different nitrogen content were recorded. The accurate results of the nitrogen content for CC can be obtained by using the deconvolution method when the nitrogen content is less than 3.5%. The relationship between the nitrogen content and the absorption intensity ratio of the corresponding separated absorption peaks in FTIR spectra has been expressed by an equation precisely.

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Fluorescence Spectra of Model Compounds for Light-emitting Alternating Copolymers in Heterogeneous Environments

Jun Lin YANG, Hong Zhen LIN, Min ZHENG, Feng Lian BAI

中国化学快报. 2001, 12(04): 369-372.

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In this paper, the fluorescence spectra of model compounds of light-emitting alternating copolymers, M (TPA-PPV) and M (TPA-PAV) (Scheme 1) were studied and the effect of KNO₃ on the interaction between model compounds and ionic micelle-water interface was also investigated. It is found that (I) The fluorescence changes of M (TPA-PPV) are related to the state of CTAB and SDS solution. (Ⅱ) Aggregated state can be formed in M (TPA-PAV) solution at low concentration of CTAB. (Ⅲ) Higher concentration of KNO₃ may affect the interaction between model compounds and ionic micelle-water interface.

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A New Organo-Directed Titanium Phosphate Phase Containing Zigzag Chains of Corner-Sharing TiO₆ Octahedra

Yang Hong GUO, Zhan SHI, Ding HONG, Ya Bo WEI, Wen Qin PANG

中国化学快报. 2001, 12(04): 373-376.

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可视化

A new organo-directed titanium phosphate,[NH₃CH₂CH₂NH₃]·[TiO(HPO₄)₂], was synthesized by the solvothermal method and its structure was determined by single crystal X-ray diffraction. The structure consists of 1-D zigzag chains built up from trans-corner-sharing titanium oxo octahedra running along the b axis, with fused Ti₂P three-membered rings being attached to the-Ti-O-Ti-O-backbone.

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本期目录

2001年, 第12卷, 第04期　刊出日期：2001-04-20

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本期目录

2001年, 第12卷, 第04期 刊出日期：2001-04-20

2001年, 第12卷, 第04期　刊出日期：2001-04-20