中国化学快报

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Finkelstein Reaction in Functionalized Crown-ether Ionic Liquids

Xiao Hua WANG, Han Zhi WANG, Hui LIU, Yuan KOU

中国化学快报. 2006, 17(12): 1531-1533.

摘要 ( )

可视化

Functional crown-ether ionic liquids were used as catalytic green solvents of Finkelstein reaction of 1-bromooctane and iodide. The rate and yield of the reaction were obvious improved compared with that using crown ether in water. No free crown ether loss was observed after reaction.

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Heck Arylation of Cyclohexene Promoted by Ultrasonic and Micro wave in Ionic Liquid: a Novel Method of the Synthesis of 3-Naphthylcyclohexene

Wen PEI, Chen SHEN

中国化学快报. 2006, 17(12): 1534-1536.

摘要 ( )

可视化

Synthesis of 3-naphthylcyclohexene by the Heck reactions of bromonaphthalene and naphthyl triflates with cyclohexene catalyzed by palladiun and nickel complex (promoted by ultrasonic and microwave in ionic liquid of [bmim][BF₄]) were performed with high yield and good regioselectivity. This method has advantages of environmentally benign, generality, simplicity and potential for recycling of ionic liquid and catalyat.

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Synthesis and Characterization of the Tetrazole Analogues of α-Amino Acids

Yan Min HUO, Gen Hu LEI, Yin Mao WEI, Xiao Hui ZHENG

中国化学快报. 2006, 17(12): 1537-1539.

摘要 ( )

可视化

The tetrazole analogues have been synthesized from fluorenylmethoxycarbonyl (Fmoc)protected amino acids by three steps. The structures of the analogues were characterized by HPLC-MS, ¹H NMR and ¹³C NMR.

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An Efficient Catalyst for the Direct Synthesis of N-Phenylpyrrolidine

Chun Mei LI, Zhi Li MIAO, Lei SHI, Qi SUN, Yu Hong HE

中国化学快报. 2006, 17(12): 1540-1542.

摘要 ( )

可视化

N-Phenylpyrrolidine was efficiently synthesized over the mesoporous Al₂O₃ catalyst by the reaction of the aniline and 1, 4-butylene-glycol at atmospheric pressure. The catalyst exhibited very high activity and selectivity. At the reaction temperature of 300℃, 1, 4-butylene glycol conversion attained 100% and the selectivity of N-phenylpyrrolidine could exceed 98%.

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Synthesis of a Novel Aromatic Diamino-bridged Bis(β-cyclodextrin) and its Inclusion Complexation with Dyes Molecules

Yan ZHAO, Xiao Qing LIU, Hong You ZHU, Zi Ming YANG, Rong HUANG

中国化学快报. 2006, 17(12): 1543-1546.

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可视化

A novel bridged bis(β-cyclodextrin), 4, 4'-diaminodiphenyl ether-briged-bis (6-aimino-6-deoxy-β-cyclodextrin) 3, has been synthesized and its inclusion complexation behavior with three linear guest dyes (AR, NR and MB) has been investigated by means of fluorescence spectrometry. The result obtained demonstrated that the novel bridged bis(β-cyclodextrin)showed much higher affinities towards guest dyes than native β-cyclodextrin.

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Synthesis of Hydroxypropyl-β-cyclodextrin Bonded Silica-gel and its Application to Resolution

Jin Gang YU, Ke Long HUANG, Du Shu HUANG, Jin Yue PU

中国化学快报. 2006, 17(12): 1547-1550.

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可视化

In order to set up a simple and effective method for resolution of optical isomers, hydroxypropyl-β-cyclodextrin was bonded to silica-gel, which can be used for preparation of thin-layer chromatography plates. Resolution of clenbuterol and propranolol were investigated on these thin-layer chromatography plates using different combinations of solvent systems at ambient temperature. The best simultaneous resolution was achieved in solvent system of acetonitrile-n-butanol (50:50, v/v). R_st values of resolution of clenbuterol hydrochloride and propranolol hydrochloride are 3.6 and 4.3, respectively. The spots of different enantiomers are separated clearly. The results showed that hydroxypropyl-β-cyclodextrin bonded silica-gel could be successful in resolution of chiral adrenergic drugs. The study offers a direct, rapid and reliable method for separation of this kind of optically active compounds.

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Preparation of High Selective Molecularly Imprinted Polymers for (S)-4-Phenyl-2-oxazolidinone

Yong LUO, Lan LIU, Li Hong LI, Qin Ying DENG

中国化学快报. 2006, 17(12): 1551-1554.

摘要 ( )

可视化

(S)-4-Phenyl-2-oxazolidinone imprinted polymers were prepared by using methacrylic acid (MAA) as the functional monomer, and divinylbenzene (DVB) as crosslinker. The factors, which influence the selectivity of the polymers were explored. Effective separation was observed for racemic 4-phenyl-2-oxazolidinone in mobile phase of acetonitrile. The investigation of mobile phase suggested that the hydrogen bonds between template and functional monomer was a primary factor in chiral recognition, while the preparation of polymers implied that the π-π stacking interaction between template and crosslinker played a role in imprinting procedure.

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Design, Synthesis and Biological Activity of Substituted-N-[4-(substituted-phenylsulfamoyl)phenyl]benzamide as Potential AHAS Inhibitors

Jian Guo WANG, Yong Jun XIAO, Yong Hong LI, Xing Hai LIU, Zheng Ming LI

中国化学快报. 2006, 17(12): 1555-1558.

摘要 ( )

可视化

Based on the crystal structure of AHAS/sulfonylurea complex, we obtained 296 compounds with low binding energy towards AHAS via virtual screening. One series of them have been synthesized. Preliminary bioassay indicated that some compounds displayed good herbicidal activity on rape and barnygrass and inhibited AHAS to some extent. This study indicated the rationality of our molecular design based on the crystal structure of target enzyme.

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An Efficient Solid State Method for Deoximation under Mild Conditions

Wang ZHOU, Qian He LI, Sha PENG

中国化学快报. 2006, 17(12): 1559-1562.

摘要 ( )

可视化

Oximes of ketones and aldehydes are efficiently converted to the corresponding carbonyl compounds, using a combination of NaHSO₄·H₂O and paraformaldehyde in good to excellent yields under solid state conditions at room temperature for 10 minutes.

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Synthesis of New Thiazine and Thiosemicarbazone Derivatives from D-Xylose

Xiao Ming JI, He Ping SUN, Hai Wei XU, Hong Min LIU

中国化学快报. 2006, 17(12): 1563-1565.

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可视化

1, 2-O-Isopropylidene-5-O-p-toluenesulfonyl-α-D-erythro-pentofuranos-3-ulose 1 was treated with thiourea and aminothiourea to give a D-ribose derivative 2 bearing a 2-amino 1, 3-thiazine ring and a thiosemicarbazone derivative 5, respectively. 2 was acylated with Ac₂O and propandioic acid to afford two acylation derivatives 3 and 4, respectively. Reduction of 5 with NaBH4 in methanol produced a hydrothiosemicarbazone derivative 6. The absolute configuration of 2 was confirmed by X-ray crystallographic analysis. The structures of all products were elucidated by IR, NMR and HRMS spectra.

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CAN Catalyzed Preparation of β-Enamino Ketones from Amines and Acetylacetone

Zheng DUAN, Ting LI, Xue Jie XUAN, Yang Jie WU

中国化学快报. 2006, 17(12): 1566-1568.

摘要 ( )

可视化

A variety of β-enamino ketones were synthesized in high to excellent yields by reacting acetylacetone with amines in the presence of a catalytic amount of cerium(Ⅳ) ammonium nitrate(CAN) under ultrasonic irradiation.

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A New Triterpene from Cynanchum forrestii

Yue LIU, Jing QU, Shi Shan YU, Jing LIU, You Cai HU

中国化学快报. 2006, 17(12): 1569-1572.

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可视化

A new triterpene, named cynanotriterpene A, with a ring-A-fission (3, 4-seco) and 13, 27-cyclours-3-oic acid methyl ester skeleton was isolated from the roots of Cynanchum forrestii Schlechter. The structure of the new compound was elucidated on the basis of spectroscopic method and X-ray diffraction.

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A New Taraxastane-type Triterpenoid from Potentilla multicaulis

Ping Lin LI, Zhan Xin ZHANG, Zhong Jian JIA

中国化学快报. 2006, 17(12): 1573-1575.

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可视化

A new taraxastane-20β, 28β-epoxy-28-hydroxy-3β, 11α-diol- 11-p-hydroxylbenzoate was isolated from the roots of Potentilla multicaulis. Its structure was elucidated by spectroscopic methods, especially 2D NMR techniques.

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A New Flavonoid from Oxytropis kansuensis

Jun Xi LIU, Xin Yi HUANG, Duo Long DI, Sheng Xiang JIANG

中国化学快报. 2006, 17(12): 1576-1578.

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可视化

A new flavonoid 1 rhamnocitrin-3-O-(6"-feruloyl)-β-D-galactopyranoside-4'-O-β-D-glucospyranoside called kansuensisoside A together with a known flavonoid 2 (rhamnocitrin-3-O-β-D-galactopyranoside-4'-O-β-D-glucospyranoside) were isolated from the extract of the whole plant of Oxytropis kansuensis Bunge. The structure of 1 was elucidated by spectroscopic methods including 2D-NMR techniques (COSY, HMQC, HMBC) and HR-ESIMS.

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A New Dimeric Phthalide from Angelica sinensis

Ling YI, Ping LI, Zhi Ming BI

中国化学快报. 2006, 17(12): 1579-1581.

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可视化

A new dimeric phthalide named Z, Z'-3.3'a, 7.7'a-diligustilide was isolated from the roots of Angelica sinensis. Its structure was determined using spectroscopic methods and X-ray crystallographic diffraction analysis.

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Determination of Trace Mercury by Catalytic Solid Substrate-room Temperature Phosphorimetry

Jia Ming LIU, Yun Xiong WU, Shao Xian LIN, Fei Ming LI, Xiu Mei SHI, Zhong Bin SHI, Guo Hui ZHU, Zhi Ming LI, Xiao Mei HUANG

中国化学快报. 2006, 17(12): 1582-1584.

摘要 ( )

可视化

A new highly sensitive method (detection limit: 4.1 ag spot^-1, sample volume: 0.4 μL spot^-1) for the determination of trace Hg²⁺ by catalytic solid substrate-room temperature phosphorimetry has been established in this paper. This method has been successfully applied to determine trace Hg²⁺ in water.

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Amperometric Determination of Indole-3-acetic Acid Based on Platinum Nanowires and Carbon Nanotubes

Ruo Zhong WANG, Lang Tao XIAO, Ming Hui YANG, Jun Hui DING, Feng Li QU, Guo Li SHEN

中国化学快报. 2006, 17(12): 1585-1588.

摘要 ( )

可视化

Platinum nanowire (PtNW) can be grown by electrodeposition in polycarbonate membrane, with the average diameter of the nanowires about 250 nm. The PtNW and multiwalled carbon nanotubes (CNT) are then dispersed into chitosan (CHIT) solution. The resulting PtNW-CNT-CHIT material brings new capabilities for electrochemical devices by using the synergistic action of the electrocatalytic activity of PtNW and CNT. By dropping the PtNW-CNT-CHIT film onto the glassy carbon (GC) electrode surface, and after evaporationan amperometric sensor for the determination of indole-3-acetic acid (IAA) was developed. The oxidation current of IAA increased significantly at the PtNW-CNT-CHIT film coated GC electrode, in contrast to that at the CNT-CHIT modified GC. The linear response of the sensor is from 50ng/ml to 50 μg/ml with a detection limit of 25 ng/mL.

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Direct Electrochemistry of Hemoglobin Immobilized in Sodium Alginate Film on the Ionic Liquid [BMIM]PF₆ Modified Carbon Paste Electrode

Wei SUN, Dan Dan WANG, Rui Fang GAO, Jian SUN, Kui JIAO

中国化学快报. 2006, 17(12): 1589-1591.

摘要 ( )

可视化

Room temperature ionic liquid (RTILs) [BMIM]PF₆ was used as a new kind of binder to construct a chemical modified carbon paste electrode (CPE) and the direct electrochemistry of hemoglobin (Hb), which was immobilized on the surface of RTIL/CPE with the film of sodium alginate hydrogel, was studied by cyclic voltammetry. The presence of RTILs improved the direct electron transfer of Hb and a pair of well-defined quasi-revesible redox peaks appeared in pH 7.0 B-R buffer solution. The cathodic and anodic peak potentials were located at -0.383 V and -0.305 V with the formal potential (E⁰') at -0.344 V (vs. SCE). In addition the immobilized Hb showed good electrocatalytic activity to the reduction of H₂O₂.

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Study on Interaction of L-Tryptophan with p-Sulfonatocalix[4]arene by Spectrofluorometry

Wen Ye LI, Ying Li WEI, Wen Ting AN, Shao Min SHUANG, Man Shing WONG

中国化学快报. 2006, 17(12): 1592-1594.

摘要 ( )

可视化

The interactions between L-tryptophan(L-Trp) and water-soluble p-sulfonatocalix[4]-arene (SCX4) were investigated by spectrofluorometry. The effect of pH was discussed. The interaction process was estimated from the thermodynamic viewpoint. The SCX4 was found to be able to adjust its conformation to fit the size of L-Trp, and the benzene of L-Trp penetrated into the hydrophobic cavity of SCX4. Meanwhile, the binding mechanism was further elucidated by ¹HNMR and molecular mechanics calculations.

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Determination of Potassium Ferrocyanide in Foods by Resonance Rayleigh Scattering Method with Basic Triaminotriphenylmethane Dyes

Yong Li LI, Zhong Fang LIU, Li Sha XIE, Ling KONG, Shao Pu LIU

中国化学快报. 2006, 17(12): 1595-1598.

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可视化

In this work, a sensitive, rapid and simple method for the determination of trace amounts of potassium ferrocyanide in salinized foods and table salt using EV as a RRS probe is established. The detection limit (3σ) of the EV system is 7.8 ng/mL. This new method is more suitable for the determination of the trace amounts of potassium ferrocyanide in colour salinized foods and it can not be disturbed by the color of salinized foods.

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Determination of Enantiomeric Compositions of Tryptophan by Chemometric Analysis of the Fluorescence Spectra of Bovine Serum Albumin Receptor-ligand Mixtures

Yun Xia WANG, Fang ZHANG, Jing LIANG, Hua LI, Ji Lie KONG

中国化学快报. 2006, 17(12): 1599-1602.

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可视化

In this work, a novel method was constructed to determine the enantiomeric composition of tryptophan (Trp) by bovine serum albumin (BSA) based on the fluorescence spectra of the receptor-ligand mixtures coupled with partial least squares (PLS-1) analysis. As a result the enantiomeric composition of Trp was accurately determined.

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Simultaneous Determination of Magnolol and Honokiol by Synchronous Fluorescence Spectroscopy

Min ZHANG, Li Ming DU

中国化学快报. 2006, 17(12): 1603-1606.

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可视化

A simple sensitive and quick assay for simultaneously determining magnolol (MOL)and honokiol (HOL) has been described based on their natural fluorescence. This method is based on the fact that synchronous fluorometry could resolve the overlapping of fluorescence spectra, which was aroused by their similar molecular structures. In this work, the synchronous spectrum, maintaining a constant difference of Δλ=10 nm between the emission and excitation wavelengths, has been selected for the determination of HOL and MOL. Under the optimum conditions, the fluorescence intensity is proportional to the concentration of MOL and HOL in solution over the range 0.075-0.7 μg/mL and 0.05-0.9 μg/mL with the detection limit of 0.029 μg/mL and 0.019 μg/mL, respectively. The method was applied to the simultaneous determination of MOL and HOL in pharmaceutical dosage with satisfactory results.

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Studies on the Simultaneous Synthesis of Dimethyl Carbonate and Poly(ethylene terephthalate): Ⅰ. Catalytic Activity of Metal Acetate in Transesterification of Ethylene Carbonate with Dimethyl Terephthalate

Dan ZHANG, Shu Yong JIA, Yue WANG, Jie YAO, Yi ZENG, Gong Ying WANG

中国化学快报. 2006, 17(12): 1607-1610.

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可视化

A novel direct method for preparation of dimethyl carbonate and poly(ethylene terephthalate) from ethylene carbonate and dimethyl terephthalate has been demonstrated in the presence of metal acetate catalysts, lithium acetate dihydrate showed highest catalytic activity with 47.9% yield of dimethyl carbonate. This method was a green chemical process.

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Preliminary Study on Lipase-catalyzed Synthesis of Polyesters Containing L-Malic Acid Units

Da Hu YAO, Guang Ji LI

中国化学快报. 2006, 17(12): 1611-1614.

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可视化

Terpolymer of 1, 8-octanediol, adipic acid, and L-malic acid was synthesized via a lipase-catalyzed direct polycondensation. The products were characterized by GPC and ¹H NMR.The results indicated that the molecular weight of the prepared polymers decreased with increasing L-malic acid content in the monomer feed ratio, and that change in the L-malic acid content from 0to 20 mol% did not remarkably influenced on the molecular weight distribution M_w/M_n of the prepared samples. The ¹H NMR spectra of the obtained copolymer samples showed that hydroxyl groups of L-malic acid did not take part in the polymerization reaction.

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Studies of Self-assembled Monolayers Formed by Imidazoline on Iron Surface by SEM and SECM

Xiu Yu LIU, Shen Hao CHEN, Shuai MIAO, Su Xiang WU, Li Xia SHEN, Yuan Xing CAI, Hong Yan ZHAI

中国化学快报. 2006, 17(12): 1615-1618.

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可视化

The self-assembled monolayers (SAMs) of imidazoline (IM) on the iron surface were characterized by scanning electron microscope (SEM) and scanning electrochemical microscopy(SECM). The results showed that SAMs were an effective inhibition film for iron.

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Improvement of the Specificity of Surface Plasmon Resonance with BSA-modified Chip

Li Hua CHEN

中国化学快报. 2006, 17(12): 1619-1622.

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可视化

A chip was modified with bovine serum albumin (BSA), then interaction between glutathione (GSH) immobilized on the top of BSA and glutathione-S-transferase (GST) was examined, using surface plasmon resonance (SPR). The SPR results showed that BSA-modified chip was effective not only in binding the target proteins but also in suppressing the nonspecific binding (NSB) of proteins.

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Preparation of PdCo Bimetallic Hollow Nanospheres and its Electrocatalytic Activity for Oxidation of Formic Acid

Ya Wen TANG, Shuang CAO, Ling Ling ZHANG, Jian Chun BAO, Ping ZHOU, Tian Hong LU

中国化学快报. 2006, 17(12): 1623-1627.

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可视化

The PdCo bimetallic hollow nanospheres with 80 nm average diameter and around 9.0 nm thickness of the shell were prepared with a special reduction method and characterized with transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS). The electrochemical measurements illustrated that the electrocatalytic activity of the PdCo bimetallic hollow nanospheres for the oxidation of formic acid is much higher than that of the Pd solid nanospheres.

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2006年, 第17卷, 第12期　刊出日期：2006-12-20

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本期目录

2006年, 第17卷, 第12期 刊出日期：2006-12-20

2006年, 第17卷, 第12期　刊出日期：2006-12-20