中国化学快报

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An Efficient Route to Iodohydrin Using Polymer-supported Hypervalent Iodine(Ⅲ) Reagent

Jiang Min CHEN, Lu Ling WU, Xian HUANG

中国化学快报. 2004, 15(12): 1387-1388.

摘要 ( )

可视化

Several iodohydrins are synthesized in fairly high yields by using polystyrene-supported phenyliodine(Ⅲ) bis (trifluoroacetate).

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Enantioselective Synthesis of (+)-Nuciferal, (+)-(E)-Nuciferol and (+)-α-Curcumene by Chiral Hydrogenesterification Reaction

Zhen Ting DU, Xue Gong SHE, Guo Ren YUE, Jun Ying MA, Yang LI, Xin Fu PAN

中国化学快报. 2004, 15(12): 1389-1391.

摘要 ( )

可视化

Using chiral hydrogenesterification reaction as the key step, the stereoselective synthesis of (+)-nuciferal 1, (+)-(E)-nuciferol 2 and (+)-α-curcumene 3 has been achieved.

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Facile Synthesis of Isoamericanol and Isoamericanin A

Xiao Bi JING, Chao Guo YAN, Jing SUN, Li WANG

中国化学快报. 2004, 15(12): 1392-1394.

摘要 ( )

可视化

A number of benzodioxane compounds were synthesized using the palladium-catalyzed etherification of aryl halides by employing triphenylphosphane ligands. This method was used askey step in the synthesis ofisoamericanol A and isoamericanin A.

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Study on the Stereoselective Synthesis of Carbapenem Sidechain (2S,4S)-4-Acetylsulphanyl-2-[(S)-1-phenylethylcarbamoyl]-pyrrolidine-1-carboxylic Acid 4-Nitrobenzyl Ester

Qian LIU, Gang FANG, Li Ping WU, Jian Mei CUI, Xiao Tian LIANG, Song WU

中国化学快报. 2004, 15(12): 1395-1396.

摘要 ( )

可视化

A stereoselective and economic synthesis of the carbapenem sidechain (2S, 4S)-4-ace-tylsulphanyl-2-[(S)1-phenylethyl-carbamoyl] pyrrolidine-l-carboxylic acid 4-nitrobenzyl ester was developed. Due to the effect of spatial hindrance, only the (2S,4S) diastereomer 3 was obtained by coupling 1 and the inexpensive racemic 2 catalyzed by EEDQ.

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The Synthesis and Activity in vitro of a Series of 5-Amino-8-methoxyquinolones

Jiu Yu LIU, Yan LÜ, Yu Cheng WANG, Hui Yuan GUO

中国化学快报. 2004, 15(12): 1397-1399.

摘要 ( )

可视化

A series of l-cyclopropyl-5-amino-6-fluoro-8-methoxyquinoline-3-carboxylic acids have been prepared and evaluated for antibacterial activity in vitro.

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An Efficient Approach to 6, 7-Disubstituted-1H-quinoxalin-2-ones

Xun LI, Qing Ping HU, Xue Gui CUI, Dong Hua WANG

中国化学快报. 2004, 15(12): 1400-1402.

摘要 ( )

可视化

A novel approach to the synthesis of 6, 7-disubstituted-1H-quinoxalin-2-ones is described.The title compounds were regioselectively prepared by starting from substituted phenylamines and chloroacetyl chloride through the efficient sequence ofacylation, nitration, reduction, intramolecular alkylation, and oxidation.

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Catechol-Bisphosphonate Conjugates: New Potential Chelating Agents for Metal Intoxication Therapy

Guang Yu XU, Chun Hao YANG, Bo LIU, Xi Han WU, Yu Yuan XIE

中国化学快报. 2004, 15(12): 1403-1406.

摘要 ( )

可视化

In a quest for better chelating therapy drugs for the treatment of intoxication by Fe, Al, or actinides, two new series of mixed catechol-bisphosphonate through amide linkage were synthesized.Benzyl group was used as protecting group to avoid the breakage of amide by acid hydrolysis or imcomplete reaction in silylation-dealkylation using bromotrimethylsilane.

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Synthesis and Photochemical Properties of a New Substituted Phenol Covalently Linked to Ruthenium (Ⅱ) Tris-bipyridine Containing Four Ester Groups as Sensitizer

Feng SHI, Hong Yang LI, Xiao Jun PENG, Rong ZHANG, Xiao Qiang CHEN, Jiang Li FAN, Li Cheng SUN

中国化学快报. 2004, 15(12): 1407-1410.

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可视化

As photosensitizer for solar cell, a new ruthenium (Ⅱ) complex with four ester groups had been synthesized, in which a phenol substituted by {[(2-hydroxy-5-tert-butylbenzyl)(pyridyl2-methyl)amino]methyl} is covalently linked to ruthenium (Ⅱ) tris-bipyridine. The structures of the new compounds were confirmed by NMR and ESI-MS spectra. The electrochemical and photochemical properties were also studied.

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Synthesis and CD Spectra of Chiral Molybdenum-fullerenyl Complexes with Pineno-bipyridine Ligands

Hui ZHANG, Cai Fei ZHU, Li LI, Wei ZOU, Yong Qing HUANG, Jing Xing GAO

中国化学快报. 2004, 15(12): 1411-1414.

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可视化

The synthesis and characterization of two chiral fullerene complexes (+)₄₃₀^CD-[Mo(η²-C₆₀)(CO)₃(L^RR)] 1 and (-)₄₃₀^CD-[Mo(η²-C₆₀)(CO)₃(L^SS)] 2 were described. The CD spectra of 1 and 2 in the visible range show weak Cotton effects, which are approximately of mirror image, indicating that the appended pineno-groups with opposite chirality in bipyridines can perturb the fullerene chromophores through the molybdenum centers and lead to induced CD effects.

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Friedel-Crafts Acylation Reactions Using Catalytic SbCl₅-TEBA Complex as an Efficient Catalyst

An Ping HUANG, Xue Yuan LIU, Lian Hua LI, Xiao Li WU, Wei Min LIU, Yong Min LIANG

中国化学快报. 2004, 15(12): 1415-1418.

摘要 ( )

可视化

SbCl₅-TEBA (PhCH₂NEt₃Cl) complex catalyzes the Friedel-Crafts acylation reactions efficiently.

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Study on Bicoordination Chiral Inducement Catalysis of (R)-4-Thiazolidinecarboxylic Acid

Hui WANG, Wei Wei PEI, Guo Bin SUN, Wei Ping YE

中国化学快报. 2004, 15(12): 1419-1422.

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可视化

The bicoordination chiral inducement catalysis of (R)-4-thiazolidinecarboxylic acid in the enantioselective borane reduction of prochiral ketones has been studied. The fact that the absolute configuration of the main product can be changed by simply using different operation methods was firstly verified. And the reason of bicoordination chiral inducement was discussed.

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Synthesis and Characterization of Star-like Liquid Crystals Centered by Silicon

Jian Qiang LIU, Qi Zhen ZHANG, Jing Zhi ZHANG

中国化学快报. 2004, 15(12): 1423-1426.

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可视化

The synthesis and characterization of two new star-like liquid crystals are reported.They are made of a silicon core and four alkoxyazobenzene monomers in the periphery. Their phase behaviors and the structures are determined by infrared absorption spectroscopy (IR),nuclear magnetic resonance spectroscopy (NMR), elemental analysis (EA), polarizing optical microscope (POM) and differential scanning calorimetry (DSC).

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Synthesis and Photocytotoxicity of Mono-functionalised Porphyrin with Valine Moiety

Wei Min SHI, Jian WU, Yi Feng WU, Kai Xian QIAN

中国化学快报. 2004, 15(12): 1427-1429.

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可视化

A mono-funtionalised tetraphenylporphyrin (TPP) bearing valine moiety at the phenyl ring was synthesized for photocytotoxicity examination in four steps, starting from regiospecific mono-nitration of TPP at the phenyl ring. The in vitro photocytotoxicitic effect against SPC-A1 adenocarcinona cell line was tested.

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An Efficient and Chemoselective Deprotection of tert-Butyldimethylsilyl Protected Alcohols Using SnCl₂·2H₂O as Catalyst

Jun HUA, Zhi Yong JIANG, Yan Guang WANG

中国化学快报. 2004, 15(12): 1430-1432.

摘要 ( )

可视化

An efficient and selective method for the deprotection of primary alcoholic tert-butyl-dimethylsiyl(TBS) ethers using SnCL₂·2H₂O as catalyst is described. The reaction conditions allow primary alcoholic TBS ethers to be desilylated chemoselectively in the presence of phenolic TBS ethers, secondary and tertiary alcolholic TBS ethers, and the extensively used TBDPS-,acetyl-, benzyloxycarbonyl-, p-toluenesulfonyl-and benzyl protective groups.

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Enantioselective Total Synthesis of the (+) Antipode of Zeylenone

An LIU, Zhan Zhu LIU, Zhong Mei ZOU, Shi Zhi CHEN, Li Zhen XU, Shi Lin YANG

中国化学快报. 2004, 15(12): 1433-1436.

摘要 ( )

可视化

Starting from shikimic acid, the total synthesis of zeylenone was studied. The product was proved to be the (+)antipode of zeylenone through analysis and comparison of their respective spectra (including NMR, MS, IR and CD) and optical data. The absolute configuration of the natural product was thus determined to be (1 S,2S,3R).

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Room Temperature Ionic Liquid: a Powerful Additive of Mn(Salen) Catalyzed Oxidation of sec-Alcohols

Jing Wei LI, Wei SUN, Li Wen XU, Chun Gu XIA, Hong Wang WANG

中国化学快报. 2004, 15(12): 1437-1440.

摘要 ( )

可视化

A simple, mild, efficient Mn(salen)-catalyzed oxidation system of secondary alcohols, in which the ionic liquid[bmim]PF₆ acts as a powerfiil additive, has been described. The reaction proceeded with higher efficiency. The catalyst was more easier to recycle in ionic liquid[bmim]PF₆ with a well-proportioned CH₂Cl₂ than in the single CH₂Cl₂ or ionic liquid.

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Three Novel Eremophilanolides from Ligularia virgaurea spp.oligocephala

Quan Xiang WU, Yan Ping SHI, Li YANG

中国化学快报. 2004, 15(12): 1441-1444.

摘要 ( )

可视化

From the alcoholic extract of the whole plant of Ligularia virgaurea spp. oligocephala,three novel eremophilane sesquiterpene lactones, 6α, 10α-dihydroxy-l-oxoeremophila-7(11),8(9)-dien-8, 12-olide, 6β, 10α-dihydroxy-1-oxoeremophila-7(11), 8(9)-dien-8, 12-olide and 10α-hydroxy-l-oxoeremophila-7(11), 8(9)-dien-8, 12-olide were isolated. Their structures were elucidated by various spectroscopic methods including intensive 2D NMR techniques (COSY,HMQC, HMBC and ¹H-¹H NOESY) and HR-MS.

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Two New Steroidal Glycosides from Caryopteris terniflora

Yong Hong ZHANG, Qing Yi WEI, Zhong Li LIU, Li YANG, Dong Liang CHENG

中国化学快报. 2004, 15(12): 1445-1447.

摘要 ( )

可视化

Two new steroidal glycosides were isolated from the Chinese medicinal plant Caryopteris terniflora. The spectroscopic and chemical evidences revealed that their structures to be 6'-(β-sitosteroyl-3-O-β-glucopyranosidyl) hexacosanate 1 and 6'-(stigmasteroyl-3-O-β-glucopyranosidyl) linolenate 2, respectively.

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A New Anthranquinone Glycoside from the Seeds of Cassia obtusifolia

Chu Hua LI, Xiao Yi WEI, Xu E LI, Ping WU, Bao Jiang GUO

中国化学快报. 2004, 15(12): 1448-1450.

摘要 ( )

可视化

A new anthraquinone glycoside, emodin-1-O-β-gentiobioside 1, together with three known compounds, chrysophanol-1-O-β-gentiobioside 2, physcion-8-O-β-gentiobioside 3, and chrysophanol-1-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside 4 was isolated from the seeds of Cassia obtusifolia. Its structure was elucidated on the basis of spectroscopic evidence.

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A New Diterpenoid Glucoside from Aster smithianus

Shou Jun GUO, Xing Hua ZHAO, Dong Liang CHENG

中国化学快报. 2004, 15(12): 1451-1453.

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可视化

A new diterpenoid trisaccharide, smithoside A, was isolated from Aster smithianus. Its structure was identified as pimar-15(16)-β-en-3β, 8β, 11α-triol-3-O-β-D-glucopyranosyl (l→3)-[β-glucopyranosyl (1→2)]-β-D-glucopyranoside on the basis of the spectral and chemical methods.

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A New Sesquiterpene Lactone from Ainsliaea bonatii

Jian Xin PU, Jing Feng ZHAO, Xiao Dong YANG, Shuang Xi MEI, Hong Bin ZHANG, Liang LI

中国化学快报. 2004, 15(12): 1454-1456.

摘要 ( )

可视化

A new sesquiterpene lactone, Ainsliaolide A, was isolated from Ainsliaea bonatii. The structure was determined on the basis of spectral data.

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The Direct Resolution of the Enantiomers of Four Chiral Pesticides

Peng WANG, Shu Ren JIANG, Zhi Qiang ZHOU

中国化学快报. 2004, 15(12): 1457-1460.

摘要 ( )

可视化

Cellulose-tris(3,5-dimethylphenylcarbamate)(CDMPC) were synthesized as high-performance liquid chromatography (HPLC) chiral stationary phase(CSP). The successful resolution of four chiral pesticides on the CSP was realized and the influence of the temperature on the separation was studied.

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Study of Electron Transfer Reactions Between a Water/1,2-Dichloroethane Interface by Scanning Electrochemical Microscopy

Xiao Quan LU, Li Na HU, Xiao Qiang WANG, Jing CHEN

中国化学快报. 2004, 15(12): 1461-1464.

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可视化

Electron transfer (ET) from ascorbic acid (AA) in aqueous to ferrocene (Fc) in 1,2-dichloroethane (DCE) was probed by the scanning electrochemical microscopy (SECM). The rate constants were extracted from the dependence of the steady-state current at ultramicro-electrode (UME, tip) on the distance between the tip and the phase boundary by comparison to theoretical working cures.

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Competitive Adsorption between Bovine Serum Albumin and Collagen Observed by Atomic Force Microscope

Yong YU, Pei Qing YING, Gang JIN

中国化学快报. 2004, 15(12): 1465-1468.

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可视化

Atomic force microscopy (AFM) was used to study the competitive adsorption between bovine serum albumin (BSA) and type Ⅰ collagen on hydrophilic and hydrophobic silicon wafers.BSA showed a grain shape and the type Ⅰ collagen displayed fibril-like molecules with relatively homogeneous height and width, characterized with clear twisting (helical formation). These AFM images illustrated that quite a lot of type Ⅰ collagen appeared in the adsorption layer on hydrophilic surface in a competitive adsorption state, but the adsorption of BSA was more preponderant than that of type Ⅰ collagen on hydrophobic silicon wafer surface. The experiments showed that the influence of BSA on type Ⅰ collagen adsorption on hydrophilic surface was less than that on hydrophobic surface.

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Capillary Electrochromatography of Molecularly Imprinted Monolithic Column Using p-Hydroxybenzoic Acid as Templates

Zhao Sheng LIU, Yan Li XU, Chao YAN, Ru Yu GAO

中国化学快报. 2004, 15(12): 1469-1472.

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可视化

Molecularly imprinted polymers using p-hydroxybenzoic acid as templates was synthesized by an in situ polymerization reaction and rendered capillary monolithic column was used in capillary electrochromatographic mode. Good molecular recognition was achieved for p-hydroxybenzoic acid and good resolution of isomers can be realized.

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Ion Recognition and Analytical Application of a Fibroin Modified Electrode

Qiong CHENG, Tu Zhi PENG, Xiao Bo HU, Catherine F. YANG

中国化学快报. 2004, 15(12): 1473-1476.

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可视化

A novel fibroin modified electrode with ion recognition was reported. The membrane with isoelectric point of pH 4.5, was modified on graphite and carbon fiber electrodes. The pH-responsive ion recognition of the modified electrode was investigated by use of some neurocompounds. The fibroin carbon fiber electrode has been used for in-vivo determination.

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Preparation of Polymeric Monolithic Column and Application to the Resolution of Aromatic Compounds in Capillary Electrochromatography

Xia WANG, Wen Zhi LI, Chun Hui LIU, Yong Min LI, Li Ren CHEN

中国化学快报. 2004, 15(12): 1477-1479.

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可视化

Polymeric monolithic capillary colunm-poly(GMA-co-EDMA-co-AMPS) was prepared and used for resolution of aromatic compounds (benz alcohol, 2-phenylethanol, toluene, ethylbenzene).

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Spillover on a Platinum Electrode Modified by MWNTs

Xiao Feng WANG, Dong Ping ZHAN, Yun Yi FU, Ru HUANG, Xing ZHANG, Yuan Hua SHAO

中国化学快报. 2004, 15(12): 1480-1482.

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可视化

The spillover phenomenon is observed on the platinum (Pt) disk electrode modified bymulti-wall carbon nanotubes (MWNTs). The rate of the spillover of oxygen-containing species produced on Pt surface to and from MWNTs is fast. However for hydrogen-adatoms, the spillover is very weak. The selective spillover on the Pt/MWNTs electrode may provide a novel way to design catalysts.

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The Deactivation of Nickel Hydroxide to Hypophosphite Electrooxidation on a Nickel Electrode

Yue ZENG, Min MO, Jian Long YI, Xin Jun TANG, Hui Xian WANG

中国化学快报. 2004, 15(12): 1483-1486.

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可视化

The deactivation of nickel hydroxide to the electrooxidation of hypophosphite on a nickel electrode was studied by means of in situ UV-Vis subtractive reflectance spectroscopy. The experimental results show that when the potential is lower than-1.0V (SCE), the surface on nickel electrode is free of nickel hydroxide, on which hypophosphite is active. When the potential moves positively to about-0.75V, two absorbency bands around 300 nm and 550 nm, which were ascribed to the formation of α-nickel hydroxide, were observed, nickel is oxidized to α-nickel hydroxide.Severe deactivation of the surface occurs when the nickel surface is covered with nickel hydroxide,which separates the hypophosphite ion from nickel substrate.

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Selection of Anodic Material Used in Electrolytic Process for Producing Hypophosphorous Acid

Fu Sheng WANG, Bing Kui SONG, Xiao Li HAN, Bao Gui ZHANG

中国化学快报. 2004, 15(12): 1487-1490.

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可视化

Black lead, Ti-Ru and Ti-PbO₂ were used as anode and stainless steel was used as cathode.The electrolytic process of producing hypophosphorous acid with four-compartment electrodialytic cell was studied. The comparison of some factors, such as anodic voltage, product concentration and current efficiency, of black lead, Ti-Ru, and Ti-PbO₂ electrodes was conducted. As a result, the Ti-PbO₂ electrode is the optimal anode material used, it can be in electrolytic process for producing hypophosphorous acid.

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A New Quaternary Ammonium Heteropolyoxotungstate Catalyst for Propylene Epoxidation to Propylene Oxide

Ying LU, Meng LI, Rong Hua ZHANG, Zu Wei XI, Shuang GA

中国化学快报. 2004, 15(12): 1491-1493.

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可视化

A new quaternary ammonium heteropolyoxotungstant (cat. C) is prepared and characterized. And the cat. C also is an reaction-controlled phase-transfer catalyst. The catalytic system of O₂/EAHQ (2-ethylanthrahydroquinone)/cat.c is used for the epoxidation of propylene.Under the optimal conditions, the yield of propylene oxide based on EAHQ is 84.1%, the selectivity for propylene oxide based on propylene is 99.8% and the conversion ofpropylene based on EAHQ is 84.3%. The cat.c precipitates after the epoxidation reaction for easy separation.The cat. C is stable enough to be recycled three times without any loss in selectivity.

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Effect of Transition Metals on Selective Hydrogenation of Cinnamaldehyde over Pt/ZrO₂ Catalysts

Guo Hua LAI, Ren Xian ZHOU, Xiao Xiang HAN, Xiao Ming ZHENG

中国化学快报. 2004, 15(12): 1494-1496.

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可视化

The effect of transition metals (Cr, Mn, Fe, Co and Ni) on the hydrogenation of cinnamaldehyde over Pt/ZrO₂ catalysts was studied in ethanol at 343K under 2.0MPa H₂ pressure.PtCo/ZrO₂ and PtFe/ZrO₂ catalysts exhibit high selectivity and activity of hydrogenation for C=O(93.8% at 87.3% conversion and 83.6% at 88.6% conversion, respectively), and PtNi/ZrO₂ exhibits high selectivity of hydrogenation for C=C (64.3% at 70.6% conversion). In the presence of trace H₂O and NaOH, over the PtNi/ZrO₂ (0.4wt%Ni) catalyst the selectivity to hydrocinnamaldehyde reaches 90.6% and the conversion of cirmamaldehyde is 90.5%.

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One-step Synthesis of n-Butanol from Ethanol Condensation over Alumina-supported Metal Catalysts

Ke Wu YANG, Xuan Zhen JIANG, Wei Chao ZHANGD

中国化学快报. 2004, 15(12): 1497-1480.

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可视化

One-step synthesis of n-butanol from bimolecular condensation of ethanol was firstly achieved over nickel supported gamma alumina catalyst. A mechanism of dehydration path for the growth of carbon chain by eliminating a hydroxy group from one ethanol molecule with a α-H of other ethanol molecule rather than aldol condensation was verified.

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Electrical Percolation of Carbon Black Filled Poly (ethylene oxide) Composites in Relation to the Matrix Morphology

Gen Shui CHENG, Ji Wen HU, Ming Qiu ZHANG, Ming Wei LI, Ding Shu XIAO, Min Zhi RONG

中国化学快报. 2004, 15(12): 1501-1504.

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可视化

The present work studies the electrical conduction performance of carbon black (CB)filled poly(ethylene oxide) (PEO) composites. The addition of CB leads to reduced matrix crystallinity as the fillers which are partly situated inside the lamellae and hinder the growth of PEO crystallites. As a result, the electrical percolation behavior is related with the matrix morphology.

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New Photoluminescence Phenomena of Ge/SiO₂ Glass Synthesized by Sol-gel Method

Yu Ying FENG, Xiao Tian GU, Jia Hong ZHOU, Jian Chun BAO, Gang LI, Tian Hong LU

中国化学快报. 2004, 15(12): 1505-1508.

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可视化

New Ge/SiO₂ glasses have been synthesized by heating the GeO₂/SiO₂ dry gels under H₂ gas at 700℃. The resulting fluorescence spectra show that this kind of Ge/SiO₂ glasses emit strong photoluminescence at 392 nm (3.12 eV), medium strong photoluminescence at 600 nm (2.05 eV)and weak photoluminescence at 770 nm (1.60 eV) respectively. Possible photolnminescence mechanisms are also discussed based on the results of X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS).

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Enhancement of H₂ Sensing Properties of In₂O₃-based Gas Sensor by Chemical Modification with SiO₂

Zi Li ZHAN, Deng Gao JIANG, Jia Qiang XU

中国化学快报. 2004, 15(12): 1509-1512.

摘要 ( )

可视化

The sensitivity and selectivity to H₂ of a new In₂O₃-based gas sensor were improved significantly by surface chemical modification. A dense layer of SiO₂ near the surface of the porous In₂O₃ bead was formed by chemical vapor deposition (CVD) of diethoxydimethysilane (DEMS).The dense layer functioned as a molecular sieve, thereby the diffusion of gases with large molecular diameters, except for H₂, was effectively controlled, resulting in a prominent selectivity and high sensitivity for H₂. The working mechanism of the sensor was also presented.

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2004年, 第15卷, 第12期　刊出日期：2004-12-20

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2004年, 第15卷, 第12期 刊出日期：2004-12-20

2004年, 第15卷, 第12期　刊出日期：2004-12-20