中国化学快报

Select

First Total Synthesis of (±)-Abieta-8, 11, 13-trien-7β-ol

Cheng Lu ZHANG, Ping Yan BIE, Xuan Jia PENG, Yi YANG, Xin Fu PAN

中国化学快报. 2003, 14(05): 441-442.

摘要 ( )

可视化

The first total synthesis of (±)-abieta-8, 11, 13-trien-7β-ol (7) was accomplished via a strategy of AC→ABC, in which the reduction of the ketone 6 with LiAlH₄ gave exclusively the title compound.

Select

The First Total Synthesis of (±)-3', 7-Dihydroxy-4'-methoxyflavan

Ji Jun XUE, Xian Shu ZHANG, Xi Zhou LIANG, Ying LI

中国化学快报. 2003, 14(05): 443-444.

摘要 ( )

可视化

The first total synthesis of (±)-3',7-dihydroxy-4'-methoxyflavan,a naturally occurring flavan, was described. The key step is the cyclization of 1,3-diaryl-1-propanol by BF₃·Et₂O.

Select

Synthesis of Terpyridine Derivatives Containing β-Cyclodextrin

Xian Hong YIN

中国化学快报. 2003, 14(05): 445-447.

摘要 ( )

可视化

A novel β-cyclodextrin-based terpyridine derivatives has been prepared by the coupling of 4'-(4"-bromomethyl phenyl)-2, 2':6', 2"-terpyridine with mono-6-hydroxy permethylated β-cyclodextrin.The cyclodextrin dimmer appending a 4'-phenyl-2,2':6',2"-terpyridine spacer on the primary faces was synthesized by reaction of 4'-phenyl-2,2':6',2'-terpyridine-6,6'-dicarbonitrile with an excess of 6-deoxy-6-O-tosyl-β-cyclodextrin.

Select

n-Butyl Pyridinium Nitrate as a Reusable Ionic Liquid Medium for Knoevenagel Condensation

Yi Qun LI, Xin Ming XU, Mei Yun ZHOU

中国化学快报. 2003, 14(05): 448-450.

摘要 ( )

可视化

The Knoevenagel condensation of carbonyl substrates with active methylene compounds proceeds smoothly with ammonium acetate as catalyst in n-butyl pyridinium nitrate to afford the desired products of good purity in moderate yields.

Select

Poly[styrene(iodosodiacetate)]: An Efficient Reagent for Regioselective Azido-arylselenylation of Olefins

You Chu ZHANG, Lu Ling WU, Xian HUANG

中国化学快报. 2003, 14(05): 451-452.

摘要 ( )

可视化

Poly[styrene(iodosodiacetate)] reacted with diaryl diselenides, followed by sodium azide, giving 1-azido-2-arylselenoalkanes regioselectively.The polymer reagent could be regenerated and reused.

Select

Synthesis and Absorption Properties of Calix[6]amides-based Polymers

FaFu YANG, Hong Yu GUO, Jian Rong LIN, Yuan Yin CHEN

中国化学快报. 2003, 14(05): 453-455.

摘要 ( )

可视化

Reacting calix[6]arene hexaesters with poly(ethyleneimine), a series of calix [6]amides-based polymers were obtained for the first time.It is found that they show high absorption capacities towards soft cations comparing to hard cations, and the absorption abilities enhanced with the increasing of calixarene content, which may indicates the cavity of calixarene plays crucial role in absorption.Polymer 2c shows good selective absorption capability towards Ag⁺ among the tested cations.

Select

Solid-phase Synthesis of α-Haloaldehydes from Polymer-supported 4-(Phenylseleno)morpholine

Shou Ri SHENG, Lu Ling WU, Xian HUANG

中国化学快报. 2003, 14(05): 456-458.

摘要 ( )

可视化

Polystyrene-supported 4-(phenylseleno)morpholine was synthesized and could be used as an efficient α-selenenylating agent for saturated aldehydes.α-Haloaldehydes were prepared by reaction of polystyrene-supported α-selenoaldehydes with bromine or sulfuryl chloride in good yield and high purity.

Select

A Convenient and Efficient Deallylation Procedure

Chun Bao LI, Xiu Jie JI, Shuan Ming ZHANG, Ming LU, Zhu Xuan ZHAO, Yi CUI, Yan Li XU, Qi Chao YANG, Wen Qin ZHANG

中国化学快报. 2003, 14(05): 459-460.

摘要 ( )

可视化

In the presence of NaBH₄/BF₃, allyl ethers underwent deallylation to the corresponding alcohols or phenols in good yield and high reaction rate.

Select

Preparation of Diphenyl Oxalate from Transesterification of Dimethyl Oxalate with Phenol over TS-1 Catalyst

Xin Bin MA, Sheng Ping WANG, Hong Li GUO, Gen Hui XU

中国化学快报. 2003, 14(05): 461-464.

摘要 ( )

可视化

Diphenyl oxalate was synthesized from transesterification of dimethyl oxalate with phenol over TS-1( 2.5 wt% Ti ) catalyst.TS-1 catalyst, as a heterogeneous catalyst, showed excellent selectivity of diphenyl oxalate and methylphenyl oxalate compared with other homogeneous catalysts.Lewis acid sites on TS-1 catalyst were the active sites for transesterification of dimethyl oxalate with phenol.The high selectivity was closely related to the weak acid sites over TS-1.

Select

Synthesis of Novel Carbosilane Dendrimers with Myo-inositol Cores

Zhi Jun YU, Qi Zhen ZHANG, Qi Feng ZHOU

中国化学快报. 2003, 14(05): 465-467.

摘要 ( )

可视化

The preparation of carbosilane dendrimers with cores of myo-inositol and the outmost periphery groups of allyl groups has been reported.By using alternate hydrosilylation and alkenylation reactions, the dendrimer have been carried up to the third generation with 48 allyl groups on the periphery.

Select

New Approach to Synthesis of 6,7-Dimethoxyisatin

Hong Min MA, Zhan Zhu LIU, Shi Zhi CHEN

中国化学快报. 2003, 14(05): 468-470.

摘要 ( )

可视化

A new approach to synthesis of 6,7-dimethoxyisatin is reported.2-nitro-3, 4-dimethoxy mandelonitrile in glacial acetic acid was treated with the solution of stannous chloride in hydrochloric acid to give 6, 7-dimethoxyisatin in a high yield.

Select

study on Reduction of β-Aromatic Amino Substituted Triazolyl Ketene Compounds

Yang Zhou LI, Jun Ran CHENG, Qing Min WANG, Xiang Yun GUO, Run Qiu HUANG

中国化学快报. 2003, 14(05): 471-474.

摘要 ( )

可视化

A series of β-aromatic amino substituted triazolyl ketenes were reduced at different conditions to enols and saturated alcohols, respectively.The preliminary biological tests showed that some of them exhibit good fungicidal activities.

Select

Cucurbitacin and Triterpenoid Glycosides from Hemsleya giganthy

Ya CHEN, Ming Hua CHIU, Kun GU, Zhong Rong LI

中国化学快报. 2003, 14(05): 475-478.

摘要 ( )

可视化

From rhizomes of Hemsleya giganthy collected in Shichuan of China, 16 compounds were isolated.Among them, three compounds (8, 9, 15) are new natural products called Hemslecins G; Hemsgiganosides A and B; respectively.Their structures were elucidated as 7-hydroxy-23, 24-dihydro-cucurbitacin F-25-O-acetate (8); 3-O-(6'-butyl ester-)-β-D-glu-curono-pyranosyl)-oleanolic acid-28-O-α-L-arabinopyranoside(9); 3-O-β-D-glucuropyranosyl oleanolic acid-28-O-β-D-gluco pyranosyl-(1→6)-β-D-glucopyranoside(15) by spectroscopic and chemical means.

Select

Two New Eremophilenolides from Cacalia ainsliaeflora

Man Jun MAO, Cheng Shan YUAN, Chuan Zong ZOU, Zhong Jian JIA

中国化学快报. 2003, 14(05): 479-482.

摘要 ( )

可视化

Two new eremophilenolides (3β-angeloyloxy-8β, 10β-dihydroxy-6β-ethoxyeremophile-nolide (1) and 3β, 6β-diangeloyloxy-8α-methoxy-10α-hydroxyeremophilenolide (2) were isolated from the roots of Cacalia ainsliaeflora.Their structures were elucidated by spectroscopic methods.

Select

A New Xanthanolide from Carpesium longifolium

Chao YANG, Meng Chun YE, Zhong Jian JIA

中国化学快报. 2003, 14(05): 483-484.

摘要 ( )

可视化

A new xanthanolide was isolated from the aerial parts of Carpesium longifolium.It's structure was elucidated as 1β, 4β-epoxy-5β-hydroxy-10αH-xantha-11(13)-en-12, 8β-olide by spectral methods (HRMS, 1D and 2D NMR).

Select

Two New Sesquiterpenes from Inula japonica

Chao YANG, Peng Fei WANG, Zhong Jian JIA

中国化学快报. 2003, 14(05): 485-486.

摘要 ( )

可视化

Two new sesquiterpenes were isolated from the aerial parts of Inula japonica.Their structures were elucidated as 1β-hydroxy-8β-acetoxycostic acid methyl ester and 1β-hydroxy-8β-acetoxyisocostic acid methyl ester by spectral methods.

Select

Two New Styryllactones from Goniothalamus cheliensis

Si WANG, Sheng Jun DAI, Ruo Yun CHEN, Shi Shan YU, De Quan YU

中国化学快报. 2003, 14(05): 487-488.

摘要 ( )

可视化

Two new styryllactones, iso-goniopypyrone and 8-acetyl-9-deoxygoniopypyrone, were isolated from the roots of Goniothalamus cheliensis.Their structure were elucidated on the basis of spectroscopic and chemical evidences

Select

Anti-diabetes Agents——Ⅰ: Tetralone Derivative from Juglans regia

Tian Ying AN, Li Hong HU, Rong Min CHEN, Zhong Liang CHEN, Jia LI, Qiang SHEN

中国化学快报. 2003, 14(05): 489-490.

摘要 ( )

可视化

A new compound, 4-hydroxy-α-tetralone-4-O-β-D-[6'-O-(3",4",5"-trihydroxybenzoyl) glucopyranoside (1), together with a known compound, 4-hydroxy-α-tetralone (2), has been isolated from the roots of Juglans regia.2 showed moderate bioactivity against protein tyrosine phosphatase 1B (PTP1B).

Select

Two New Spirostanol Steroidal Sapogenins from Fermented Leaves of Agave americana

Jian Ming JIN, Chong Ren YANG

中国化学快报. 2003, 14(05): 491-494.

摘要 ( )

可视化

Two new spirostanol sapogenins named agavegenin A and B were isolated from the fermented leaves of Agave americana L. Their structures were elucidated as (23S, 25R)-5α-spirostan-3β, 6α, 11α, 23-tetraol (1) and (23S, 25S)-5α-spirostan-3β, 23, 27-triol (2) by spectral methods.

Select

Intramolecular Charge Transfer Dual Fluorescence pH Sensing using p-Dibutylaminobenzoic Acid-β-cyclodextrin Inclusion Complex

Li Rong LIN, Zhao LI, Wen Liang YANG, Hong CHEN, Yun Bao JIANG

中国化学快报. 2003, 14(05): 495-498.

摘要 ( )

可视化

The intramolecular charge transfer dual fluorescence of p-dibutylaminobenzoic acid-β-cyclodextrin inclusion complex showed a substantially higher sensitivity toward aqueous solution pH variation when compared with that of p-dibutylaminobenzoic acid alone, which established a new principle for direct CT fluorescence sensing in aqueous solution by using the CT fluorophore-cyclodextrin inclusion complex.

Select

MS/MS Study of Deoxydinucleotides Bound with Alkali-metal Ions Using ESI-MS

Zeper ABLIZ, Mitsuo TAKAYAMA, Yun XIANG, Li Jun LI

中国化学快报. 2003, 14(05): 499-502.

摘要 ( )

可视化

Positive ion ESI-MS has been used to examine the fragmentation pathways of the complex ions of deoxydinucleotides with H⁺, Na⁺, K⁺ by LCQ instrument.It had been found that the dissociation varied markedly due to the differences of the base sequence.The alkali-metal ion binding site and the characterization of dissociation were directed by the size of metal ion, the sequence of base and the steric hindrance.

Select

Characterizing Long-range Correlation Properties in Nucleotide Sequences

Xiao Yan CHEN, Lun Jun BAO, Jin Yuan MO, Ying WANG

中国化学快报. 2003, 14(05): 503-504.

摘要 ( )

可视化

Using continuous wavelet transform as the analytical tool, the fractal characteristic of nucleotide sequences was studied.The fractal dimension of the exon and intron sequences for different species was calculated.We use the Mexican hat wavelet function as the mother wavelet and Hurst exponent to describe the long-range correlation.It is found that the Hurst exponent of intron sequence is larger than that of exon sequence for the same gene.

Select

Study on the Bleaching Mechanism of Indigo-carmine Catalyzed by Laccase Using EFA and MCR-ALS Methods

Hua LI, Fang ZHANG, W. KESSLER, R. W. KESSLER

中国化学快报. 2003, 14(05): 505-508.

摘要 ( )

可视化

The bleaching of indigo-carmine catalyzed by laccase was monitored on-line by UV/Vis spectroscopy.The resulted data were analyzed by evolving factor analysis (EFA) and multivariate curve resolution (MCR), and the reaction mechanism was proposed.

Select

Synthesis and Characterization of Charge-transfer Complexes of Aminoethylphosphono-and Dimethylaminoethylphosphono-heteropolytungstic Acids of Keggin Type Structure

Xiang Kai FU, Yun GONG

中国化学快报. 2003, 14(05): 509-512.

摘要 ( )

可视化

Two charge-transfer complexes of 2a and 2b of Keggin type were synthesized and characterized by elemental analysis, IR spectra, UV spectra, XRD, TG-DSC; and were compared with Hquin-PW₁₂.The primary structure of the heteropolyanions had not been changed after the formation of the charge transfer complexes.

Select

Hybrid Self-Assembled Multilayer Films Formed by Alternating Layers of Keggin Polyoxometalates and 1, 10-DAD

Li Hua GAO, Ke Zhi WANG

中国化学快报. 2003, 14(05): 513-514.

摘要 ( )

可视化

Hybrid self-assembled multilayer films were prepared by alternate adsorption of 1,10-diaminodecane (1,10-DAD) and Keggin polyoxometalates of SiW₁₂O₄₀^4-, SiW₁₁VO₄₀^5-, and PMo₁₂O₄₀^3-, respectively.The films were reproducibly grown at each adsorption cycle as monitored by UV spectroscopy.

Select

Organophosphonotungstic HPA of Keggin Type with Sulfo, Taurine and Glycine Substituted Ethylphosphonic Acids as the Coordinate Center

Xiang Kai FU, Jing Rong CHEN, Long Qin LI, Qiang WANG, Yan SUI

中国化学快报. 2003, 14(05): 515-518.

摘要 ( )

可视化

The title compounds 2a-c were synthesized and characterized for the first time.Their proton numbers are around 3.2±0.15 and are not in proportion with the valid acidity-basicity of the central phosphonic acids.The entirety of phosphonic acids 1a-c is as the coordinate center of heteropoly anions of 2a-c.

Select

Synthesis, X-Ray Structure and Characterization of a Triruthenium Cluster Complex Ru₃^ш(μ₃-O)(μ-CH₃COO)₆(py)₂Cl with Four Steps One-electron Redox Processes

Jing Lin CHEN, Gang Qiang YIN, Zhong Ning CHEN

中国化学快报. 2003, 14(05): 519-522.

摘要 ( )

可视化

The synthesis and crystal structure of oxo-centered carboxylate-bridge trinuclear ruthenium complex, Ru₃O(CH₃COO)₆(py)₂Cl (py =pyridine) (1), are reported herein.The complex 1 has been characterized by IR, cyclic voltammetry (CV), UV-Vis and X-ray crystal analysis.The complex 1 in 0.1 mol/L (n-C₄H₉)₄NPF₆-CH₂Cl₂ solution at room temperature shows four one-electron redox processes at E_1/2=-1.38,-1.20,-0.17 and 1.07 V vs.Ag/AgCl.

Select

Preparation and Characterization of New Type Ionic Liquids

Qing Hai CAI, Yong Kui SHAN, Li Yi DAI, Bi Xia SU, Ming Yuan HE

中国化学快报. 2003, 14(05): 523-524.

摘要 ( )

可视化

A new type of ionic liquids containing cation of diacetone acrylamide [or N-(1,1-bismethyl-3-oxo-butyl)acrylamide] and anions such as CH₃COO^-(Ac), CF₃COO(^-(TF), BF₄^-(BF), PF₆^-(PF), HSO₄^-(SO) and Cl^-(Cl) were prepared by normal neutralization.The obtained ionic liquids were identified by FT-IR and ¹H NMR spectroscopy.However, their properties such as melting point, conductivity, viscosity etc.were determined.

Select

One-and Two-photon Excited Fluorescence of Zinc(Ⅱ), Cadmium(Ⅱ) Complexes Containing Phenothiazine Ligand

Zhao Ming XUE, Yu Peng TIAN, Dong WANG, Min Hua JIANG

中国化学快报. 2003, 14(05): 525-528.

摘要 ( )

可视化

A new ligand, 10-ethylphenothiazinyl-3-yl-methylene thiosemicarbazon (HL) and its complexes ML₂(M=Zn²⁺, Cd²⁺), which exhibit intensive two-photon excited (TPE) fluorescence at 800 nm laser pulses in femtosecond regime, were synthesized and characterized.The measured power dependence of the fluorescence signals provided direct evidence for TPE.All of them exhibited a large two-photon absorptive cross section and, more importantly from the application point of view, high photochemical/photothermal stability.

Select

8-Hydroxyguanine, A Product From Damaged DNA Can Be Used in the DNA Salvage Pathways

Hui Hui ZENG, Jeong Yun CHOI, Myung Hee CHUNG

中国化学快报. 2003, 14(05): 529-532.

摘要 ( )

可视化

The metabolic mechanism of 8-hydroxyguanine (8-OHGua) is so far unknown, however it is known to function in the mutagenic events in biological systems.In the present study, the metabolic processes is investigated by the reaction of 8-OHGua with PRPP catalyzed by HGPRT and Mg(Ⅱ).The evidence shows that the interaction between 8-OHGua and the enzyme is indeed taken place and 8-OHGMP is formed.

Select

High Selective Hydrogenation of Acetophenone Catalyzed by Alumina Supported Platinum Nanoclusters

Qin ZHANG, Hong Xia MA, Hua CHEN, Jia Yuan HU, Xian Jun LI

中国化学快报. 2003, 14(05): 533-534.

摘要 ( )

可视化

A new preparation and reduction method of γ-Al₂O₃ supported and PVP stabilized platinum nanoclusters was studied.The catalyst exhibited very high activity and selectivity for acetophenone hydrogenation in isopropanol-KOH solution at 25~60℃ and P_H2=1~5 MPa.

Select

Fluoroscence Phenomena-New Properties of Hexakis (4-Aminophenoxy) Cyclotriphosphazene

Xiang Wen WU, Du Xia CAO, Zhi Qiang LIU, Xiu Feng CHENG, Chang Shui FANG, Min WANG, Zhuo WANG

中国化学快报. 2003, 14(05): 535-538.

摘要 ( )

可视化

Investigations of the absorption and fluorescence spectra of hexakis (4-aminophenoxy)-cyclotriphosphazene at room temperature in three solvents of different polarity (N, N-dimethyl-formamide, tetrahydrofuran and toluene) have been conducted.And fluorescence lifetimes of these three solutions were also measured.Major reasons of such spectral behavior are discussed

Select

Enhanced Photocatalytic Efficiency of TiO₂ by Combining the Modification of Ag Nanoparticles with the Application of Anodic Bias

Chun HE, Ya XIONG, Dong SHU, Xi Hai ZHU

中国化学快报. 2003, 14(05): 539-542.

摘要 ( )

可视化

Ag-TiO₂/ITO film electrode was used as photoanode to investigate the feasibility of a hybrid technology of Ag nanoparticles combined with the application of anodic bias.The results showed that the deposited Ag and applied anodic bias have an apparent additive effect.

Select

Multifractal Analysis of Morphology of TiO₂ Nano-films

Zhen Fan SUN, Yu Guang LI

中国化学快报. 2003, 14(05): 543-546.

摘要 ( )

可视化

The SEM and AFM images of three TiO₂ nano-films prepared at different conditions were obtained and transformed into digital format.The multifractal analyses for three films were made using height from a depth of thickness of film B and q from 55 to-55.The scale-invariance is very good for all lnχ_q(ε)~lnε plots and τ(q)~q plots at least close to three orders of magnitude.But the multifractal spectra f(a) of the films are quite distinct due to their different height distribution.

Select

Single & Two-photon Excited Fluorescence of Two New Compounds with 2-Benzothiazolyl as Electron Acceptor

Du Xia CAO, Qi FANG, Dong WANG, Zhi Qiang LIU

中国化学快报. 2003, 14(05): 547-550.

摘要 ( )

可视化

Two new D-π-A type compounds, where electron-donor D is tertiary amino group, electron-acceptor A is 2-benzothiazolyl and π is two conjugated styryl units, have been synthesized.They are named as trans, trans-2-{4-[4-(N, N-diethylamino)styryl]styryl}-1, 3-benzothiazole and trans, trans-2-{4-[4-(N, N-diphenylamino)styryl]styryl}-1, 3-benzothiazole.Both compounds show strong two-photon excited fluorescence in yellow-orange region when excited by a femtosecond laser at 800 nm.

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

2003年, 第14卷, 第05期　刊出日期：2003-05-20

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

2003年, 第14卷, 第05期 刊出日期：2003-05-20

2003年, 第14卷, 第05期　刊出日期：2003-05-20