中国化学快报

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A New Investigation of Mannich Reaction

Li Yuan MOU, Zi Yun LIN, Li Ya ZHU, Xiao Tian LIANG

中国化学快报. 2001, 12(06): 471-474.

摘要 ( )

可视化

During the synthesis of the derivatives of styryl ketonic Mannich bases, a side-product IM,other than the normal Mannich base MA, is obtained. Mannich reaction is further studied and the formation mechanism of product IM is postulated and discussed on the basis of deuterium labelling.

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No-solvent Condensation Reaction of Amino Acids and their Derivatives with Pyrandione

Qiang JIA, Zheng Ming LI, Su Hua WANG, Wei Guang ZHAO, You Ming WANG

中国化学快报. 2001, 12(06): 475-476.

摘要 ( )

可视化

Synthesis of a novel series of N-pyrandione substituted amino acids and their esters 3 via a condensation reaction between pyrandione and amino acid or their derivatives in excess ethyl orthoformate without solvent is described. The stereochemistry of 3 has been discussed.

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Novel Synthesis of Benzotriazol-1-yl Methyl Selenides and Tellurides

Zhi Zhen HUANG, Hong Wei JIN, De Hui DUAN

中国化学快报. 2001, 12(06): 477-478.

摘要 ( )

可视化

Benzotriazol-1-yl methyl selenides and tellurides 4a-h can be simply synthesized by the reaction of 2a-b with 3 in good yields.

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Studies on the Synthesis and Complexing Behavior of Crown Ethers with External Coordination Center

Jing Chao TAO, Yang Jie WU, Shang Jie XU, Da Peng ZOU

中国化学快报. 2001, 12(06): 479-482.

摘要 ( )

可视化

The synthesis, characterization of five ditopic or tritopic crown compounds were reported in this paper together with the preparation of the corresponding hetero-dinuclear and hetero-trinuclear complexes with different metal cations.

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Synthesis of Novel Spin Labeled Daunomycin Derivatives

Shu Jia ZHANG, Yan Guang WANG, Ju Biao LI

中国化学快报. 2001, 12(06): 483-484.

摘要 ( )

可视化

Three spin labeled daunomycin derivatives 2-4 were synthesized and their biological activities were tested against mouse leukemia L1210 and human liver cancer BEL-7402 cells in vitro.

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First Enantioselective Synthesis of Isoamericanol A and Isoamericanin A

Wen Xin GU, An Xin WU, Xue Gong SHE, Xin Fu PAN

中国化学快报. 2001, 12(06): 485-486.

摘要 ( )

可视化

The first enantioselective synthesis approach to two chiral 1,4-benzodioxane neolignans isoamericanol A and isoamericanin A was reported.

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Synthesis of cis-(±)-2-Hydroxymethyl-5-(Cytosine-1'-yl)- 1,3-Oxathiolane (BCH-189)

Ji Zhen LI, Xue Peng QIU, Lian Xun GAO, Meng Xian DING

中国化学快报. 2001, 12(06): 487-488.

摘要 ( )

可视化

The target compound BCH-189 was synthesized with high yield via four steps from benzoyloxy acetylaldehyde and p-dithiane-2,5-diol as starting materials. The synthetic route is preferable to what literature reported.

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Synthesis of Novel Chiral Diol Ligands for the Enantioselective Reactions

Ming Xia LI, Yan Ming WANG, Ru Ru CHEN

中国化学快报. 2001, 12(06): 489-490.

摘要 ( )

可视化

A series of novel enantiomerically pure diols were synthesized from D-erythorbic acid in three steps, and the absolute configuration of one of them 4a has been confirmed by X-ray analysis.

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The Synthesis of α-DDB, β-DDB and Theoretical Study with AM1

Rui Yun GUO, Jun Biao CHANG, Rong Feng CHEN, Jing Xi XIE, Da Yu YAN

中国化学快报. 2001, 12(06): 491-494.

摘要 ( )

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The present paper reports the synthesis of two analogs of Schzandrin C α-DDB, β-DDB with the gallic acid as the starting material. The key step is the synthesis of monomer of β-DDB and α-DDB for coupling. α-DDB, β-DDB have different yields in Ullmann coupling reaction under the same condition. The yield of α-DDB is little lower than that of β-DDB. The AM1 calculation demonstrates that ΔH of the Ullmann coupling reaction of α-DDB and β-DDB are different. The former is -175.76966KJ/mol and the later is -203.21246KJ/mol. This is in agreement with the fact that β-DDB has higher yield than α-DDB.

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Efficient Cleavage of DNA by the Novel Copper (Ⅱ) Complex Derived From 2,2'-Pyridil Ligand

Rui REN, Pin YANG

中国化学快报. 2001, 12(06): 495-496.

摘要 ( )

可视化

Copper (Ⅱ) complex derived from 2, 2'-pyridil ligand has been demonstrated to cleave efficiently DNA at micromolar concentrations at room temperature and pH 7.25.

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The Synthesis of a Novel Phosphorus Containing Antigen

Gui Yang XIE, Jia Hua CHEN, Shrong Shi LIN, Sheng JIN

中国化学快报. 2001, 12(06): 497-498.

摘要 ( )

可视化

Antigen 12, containing a phosphonyl peptide hapten with free C-terminal carboxylic group, was synthesized by 11 reaction steps. The design of the hapten was based on the transition state of peptide hydrolysis catalyzed by carboxypeptidase A.

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Synthesis and Pregnancy Terminating Activity of 2-Aryl imidazo [2,1-a] isoquinolines

Gui Xiang HU, Tian Xing WU, Zhi Cai SHANG, Qing Sen YU, Rui Ying FANG

中国化学快报. 2001, 12(06): 499-500.

摘要 ( )

可视化

Two 2-aryl imidazo [2,1-a] isoquinolines were synthesized and tested for pregnancy terminating activities. Both of them are new compounds and their structures were confirmed by IR, ¹HNMR, MS and elemental analysis. They both showed high activities in NIH mice.

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A New Alkaloid from the Root of Isatis indigotica Fort

Wan Sheng CHEN, Bin LI, Wei Dong ZHANG, Gen Jing YANG, Chuan Zhuo QIAO

中国化学快报. 2001, 12(06): 501-502.

摘要 ( )

可视化

A E-2-[(3'-indole) cyanomethylene]-3-indolinone was isolated from the root of Isatis indigotica Fort. The structure elucidation and ¹H, ¹³C NMR assignments were achieved by spectroscopic method.

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Two New Glucosides from Radix Polygoni multiflori Preparata

Wan Sheng CHEN, Wei Dong ZHANG, Gen Jing YANG, Hai Sheng CHEN, Chuan Zhuo QIAO

中国化学快报. 2001, 12(06): 503-506.

摘要 ( )

可视化

2,3,5,4'-tetrahydroxystilbene-2-O-(2"-O-feruloyl)-β-D-glucopyranoside, 2,3,5,4'-tetra hydroxystilbene-2-O-(2"-O-p-coumaroyl)-β-D-glucopyranoside were isolated from Radix Polygoni multiflori Preparata. Structures were elucidated by chemical and spectral evidences.

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A New Triterpene from Cephalomappa sinensis

Wen Li MEI, Yun Bao MA, Shao Hua WU, Hao Fu DAI, Da Gang WU

中国化学快报. 2001, 12(06): 507-508.

摘要 ( )

可视化

A new triterpene 1, 1β, 2α, 3β-trihydroxylup-20 (29)-ene was isolated from Cepha-lomappa sinensis. The structure was elucidated mainly on the basis of 1D and 2D NMR spectral means.

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A New Caffeoylquiniclactone, Neochlorgeniclatone from the Leaves of Betula platyphylla Suk.

Su Juan WANG, Yue Hu PEI, Hui Ming HUA

中国化学快报. 2001, 12(06): 509-510.

摘要 ( )

可视化

A new caffeoylquiniclactone, named neochlorgeniclatone, was isolated from the leaves of Betula platyphylla Suk. The structure was established by spectroscopic data.

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Effect of Calix [4]pyrrole as Addition Reagent on Anions Separation in Capillary Zone Electrophoresis (CZE)

Li Jun HE, Qing Song CAI, Shi Jun SHAO, Sheng Xiang JIANG

中国化学快报. 2001, 12(06): 511-512.

摘要 ( )

可视化

Supramolecular interaction of calix [4]pyrroles with several inorganic anions is reported by addition of calix [4]pyrroles to background electrolyte (BGE) in CZE. The retention time (t_R) of all anions increased with increasing concentration of calix [4]pyrroles. The effect on F^- is most evident.

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Using Nuclear Magnetic Resonance and MS/MS Spectroscopy for the Identification of Brodimoprim Metabolites in Rat Urine

Chun YANG, Wen Yi HE, Li Jun LI, Rui Ming XU, Shou Ren ZHANG, Zeper ABLIZ, Yi Kang SI

中国化学快报. 2001, 12(06): 513-516.

摘要 ( )

可视化

Eight metabolites of brodimoprim (BDP) in rat urine were detected by NMR and ESI-MS/MS. They were demethyl-BDP glucuronide, demethyl-BDP sulfurate, demethyl-BDP glucuronide sulfurate, α-hydroxyl-BDP, α-hydroxyl-BDP glucuronide, BDP sulfurate, N-oxide-BDP sulfurate, and α-hydroxyl-N-oxide-BDP sulfurate. All the sulfurates are reported for the first time.

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Novel Polyamides Containing Biphenyl-phthalazinone Moieties

Xiu Ling ZHU, Xi Gao JIAN, Rui Ling WANG

中国化学快报. 2001, 12(06): 517-518.

摘要 ( )

可视化

A novel diamine monomer 2H-(4-aminophenyl)-4-[4-(4-aminophenoxy) biphenyl]-phthalazinone 1 containing aza hetero cycle was synthesized and utilized for preparation of new high molecular weight aromatic polyamides with various aromatic dicarboxylic acids with the inherent viscosity of 0.50~1.62 g/dL. These polyamides had rather high glass transition temperatures of 327~356℃ and their structure was confirmed by IR, ¹H NMR and MS. They are readily soluble in polar solvents such as NMP, DMF etc. and easily cast into tough, flexible films.

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Enantioselective Alternating Copolymerization of Propylene with Carbon Monoxide Using Cationic Palladium-Chiral Diphosphine Catalyst

Jian Chao YUAN, Yu Hua ZHANG, Shi Jie LU

中国化学快报. 2001, 12(06): 519-522.

摘要 ( )

可视化

Enantioselective alternating copolymerization of carbon monoxide with propylene was carried out using palladium catalyst modified by 1,4-3,6-dianhydro-2,5-dideoxy-2,5-bis (diphenylphosphino)-L-iditol (DDPPI). The chiral diphosphine was proved to be effective at enantioselective copolymerization. Optical rotation, elemental analysis, ¹H, ¹³C-NMR and IR spectra showed that the copolymer was optically active, isotactic, alternating poly(1,4-ketone) structure.

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Synthesis and Properties of Novel Cationic Maleic Diester Polymerizable Surfactants

Jian XU, Gan Zuo LI, Guo Wei ZHOU, Fa Ye YAO

中国化学快报. 2001, 12(06): 523-526.

摘要 ( )

可视化

Three new cationic polymerizable surfactants are synthesized by the reaction of alkylmaleic hemiester with glycidyltrimethylammonium chloride. Their structures are confirmed by ¹H NMR, IR and elements analysis. The values of CMC and γ_CMC of these surfactants have been measured. One can obtain nearly monodisperse polystyrene latex by emulsion polymerization using the polymerizable surfactant.

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Natural Mordenite Catalyst Used on the Ammoniation of Methanol

Li Qiu MAO, Tong Lai ZHANG, Chang Gen FENG, Qing Ze JIAO, Da Zhen JIANG

中国化学快报. 2001, 12(06): 527-528.

摘要 ( )

可视化

The catalytic properties of natural mordenite as acidic catalysts were investigated using the ammoniation of methanol.

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Promoting the Activity of Bifunctional Catalysts for Autoxidation of 1-Octanethiol

Jian Hua ZHU, Zhen WU, Yuan CHUN

中国化学快报. 2001, 12(06): 529-532.

摘要 ( )

可视化

Methanol and detergent are chosen to be additives for the catalysts derived from active carbon supported MgO and cobalt phthalocyanine (CoPc) or CoPc/NaY zeolite, and dramatically improved the activity and stability of catalyst in autoxidation of 1-octanethiol.

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Novel Catalytic Hydrodechlorination of CCl₂F₂ over Supported PdCl₂-(n-C₄H₉)₄N⁺Cl^- Molten salts

Yu Cai CAO, Xuan Zhen JIANG

中国化学快报. 2001, 12(06): 533-536.

摘要 ( )

可视化

A novel supported liquid phase film catalyst:Supported PdCl₂-(n-C₄H₉)₄N⁺Cl^- molten salts was found to be an effective catalyst with good stability for selective hydrodechlorination of CCl₂F₂ (CFC-12) to its alternatives CH₂F₂ and CHClF₂. Addition of CoCl₂, GaCl₃ and CuCl₂ to PdCl₂-(n-C₄H₉)₄N⁺Cl^- modifies the catalytic performance of supported molten salts.

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Effect of Titanium on Methanol Synthesis from CO₂ Hydrogenation over Cu/γ-Al₂O₃

Gong Xin QI, Jin Hua FEI, Xiao Ming ZHENG, Zhao Yin HOU

中国化学快报. 2001, 12(06): 537-540.

摘要 ( )

可视化

Titanium-modified γ-alumina supported CuO catalyst has been prepared and used to methanol synthesis from CO₂ hydrogenation. The addition of Ti to the CuO/γ-Al₂O₃ catalyst made the copper in the cataσlyst exist in much smaller crystallites. The effect of the loading of Ti on the activity and selectivity to methanol from CO₂ hydrogenation was investigated. The activity was found to increase with the increasing of surface area of metallic copper, but it is not a linear relationship.

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The Nature of Bonding in PtC and PtN

Xiao Guang XIE, Xue Mei GAO, Shi Xi LUI, Huai CAO, Shu Shan DAI

中国化学快报. 2001, 12(06): 541-544.

摘要 ( )

可视化

The nature of bonding in the title compounds has been studied by using CASSCF and FOCI techniques. The ground states of PtC and PtN are found to be ¹Σ⁺ and ²Π state arising primarily from:…1σ²2σ²1π⁴1δ⁴3σ² and …1σ²2σ²1π⁴1δ⁴3σ²2π¹ configuration respectively and both of which form triple bond (one σ, two πbonds), but the bond of PtC is much stronger than that of PtN.

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Synthesis of carbon nanotubes by catalytic chemical vapor deposition using hydrogen storage alloy as a catalyst

Wei Xiang CHEN, Zhu De XU, Jiang Ping TU, Zhong Jian LIU, Ya Xu JIN, De Yi LV, Xiao Nan LU

中国化学快报. 2001, 12(06): 545-548.

摘要 ( )

可视化

Carbon nanotubes (CNTs) were syntecized by catalytic chemical deposition and using the alkali-reducing prereated hydrogen storage alloy (MINI_4.0Co_0.6Al_0.4)powder as a catalyst I was found that the surface modification of the alloy was effective to provide the catalytic active sites for CNTs growth.The Ni-and Co-clusters on the surface of the treated alloy were dominant for the growth of CNTs. The composite of CNTs with the hydrogen storage alloy has the potential to be used as a new type of hydrogen storage material without further purther purfication

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Photocatalytic Characterization of TiO₂ Supported on Active Carbon

Xue Ping LI, Feng YIN, Yuan LIN, Jing Bo ZHANG, Xu Rui XIAO

中国化学快报. 2001, 12(06): 549-550.

摘要 ( )

可视化

The Photocatalytic characterization of TiO₂ supported on active carbon was investigated for photocatalytic decomposition of dichloroacetic acid. It was found that TiO₂/AC exhibited a higher photocatalytic activity than pure TiO₂. The reason is that active carbon acting as powerful adsorbent supports makes high concentration environments of organic pollutant molecules around TiO₂ particles.

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Microwave Synthesis of Au Nanoparticles with the System of AuCl₄-CH₃CH₂OH

Zhi Liang JIANG, Zhong Wei FENG, Xing Can SHEN

中国化学快报. 2001, 12(06): 551-554.

摘要 ( )

可视化

The Au nanoparticles has been prepared by microwave high-pressure procedure with alcohol as the reducing agent. The color of colloidal Au nanoparticles is blue-violet. The maximum absorption spectrum of colloidal Au is at 580 nm, and the resonance scattering peak is at 580 nm. Using this method, the colloidal Au of long-time stability can be prepared simply and quickly.

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Preparation of Ultrafine Cobalt Powder by Chemical Reduction in Aqueous Solution

Jin Zhang GAO, Yan Chun ZHAO, Jian Niao TIAN, Wu YANG, Fei GUAN, Xiao Quan LU, Yong Jun MA, Jing Guo HOU, Jing Wan KANG

中国化学快报. 2001, 12(06): 555-558.

摘要 ( )

可视化

Nanocrystalline cobalt powders have been prepared from aqueous solution by reducing their corresponding metal salts under suitable conditions. The experimental conditions have been studied in detail. X-ray powder diffraction patterns show that the cobalt powder is hexagonal crystallite. The average particle size of the ultrafine cobalt powder is 55 nm.

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Preparation of Platinum (Ⅱ) Complexes with 1-β-D-Ribofuranosyl-1,2,4-triazole-3-carboxamide and its Deoxy-analogue

Wen PEI, Kobe JOZE

中国化学快报. 2001, 12(06): 559-562.

摘要 ( )

可视化

The platinum (Ⅱ) complexes of the [Pt (N⁴,N⁷-Ribavirin) (DMSO) Cl],[Pt (N⁴,N⁷-De-oxyribavirin) (DMSO) Cl] were obtained by the reactions of cis-[Pt (DMSO)₂ Cl₂] and K[Pt (DMSO) Cl₃] with 1-β-D-ribofuranosyl-1,2,4-triazole-3-carboxamide (Ribavirin) and its deoxy-analogue (deoxyribavirin). The preparation of 1-(2'-deoxy-β-D-ribofuranosyl)-1,2,4-triazole-3-carboxamide was also performed through a four-step procedure, protection of 3', 5'-dihydroxyl group of Ribavirin with 1,3-dichloro-1,1,3,3-tetraisopropyldisiloxane (TPDS-Cl), phenoxythio-carbonylation of the 2'-hydroxyl group of 3', 5'-O-TPDS-Ribavirin with phenoxythiocarbonyl-chloride (PTC-Cl), reduction of 2'-O-phenoxythiocarbonyl ester of 3', 5'-O-TPDS-Ribavirin with tri-n-butyltin hydride and AIBN, deprotection of 3', 5'-O-TPDS-Ribavirin with tetrabutylammon-ium fluoride in THF.

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Synthesis and Structure of Zinc Complex of N, N-bis (benzimidazol-2-yl-methyl) amine

Xiao Lan LIU, Qing Yan CHENG, Xia YANG, Zhi Wei MIAO, Wei LIU Fang Ming MIAO

中国化学快报. 2001, 12(06): 563-564.

摘要 ( )

可视化

The Zinc complex of N, N-bis (benzimidazol-2-yl-methyl)amine has been synthesized and its crystal structure determined by X-ray diffraction method. The structure features of the complex are described.

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2001年, 第12卷, 第06期　刊出日期：2001-06-20

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2001年, 第12卷, 第06期 刊出日期：2001-06-20

2001年, 第12卷, 第06期　刊出日期：2001-06-20