中国化学快报

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First Enantioselective Synthesis of (2R, 3R)-and (2S, 3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1, 4-benzodioxan-6-carbaldehyde

Wen Xin GU, Xiao Bi JING, Xiao Chuan CHEN, Xin Fu PAN

中国化学快报. 2001, 12(03): 189-192.

摘要 ( )

可视化

A novel enantioselective synthetic approach to 1,4-benzodioxane lignans was reported in which (2R, 3R)-and (2S, 3S)-2-(4-hydroxyphenyl)-3-hydroxymethyl-1, 4-benzodioxan-6-carbaldehyde were first synthesized.

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Synthesis of 2-Substituted Hexahydro-1H-1,4-diazepine Analogues

Jing Shan SHEN, Li Jun LEI, Tie Ma YAN, Jian Feng LI, Hui Jun LI, Zhen Hua LI, Ru Yun JI

中国化学快报. 2001, 12(03): 193-194.

摘要 ( )

可视化

2-substituted hexahydro-1H-1,4-diazepine analogues were synthesized starting from N,N-dibenzyl-1,3-propylene diamine and methyl-2,3-dibromo propionate through nucleophilic substitution, reduction, chlorination and debenzylation.

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A Case of Abnormal Bishler-Napieralski Cyclization Reaction, Leading to Form Benzyl Oxazole Derivatives

Zhan Zhu LIU, Shi Zhi CHEN

中国化学快报. 2001, 12(03): 195-196.

摘要 ( )

可视化

A benzyl oxazole compound 3 was obtained with an excellent yield of 90% when Nacetyl-(2'-methoxy-4',5'-methylenedioxy)-phenylalanine methyl ester 1 was refluxed in POCl₃/benzene. However, the anticipated product 3,4-dihydroisoquinoline-3-carboxylic acid methyl ester 2 could not be found. The mechanism was discussed in this article.

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An Improved Method of Total Synthesis of 2-Methoxypodocarpane-8,11,13-triene

Qiang XIAO, Yu Xin CUI, Peng Fei TU

中国化学快报. 2001, 12(03): 197-198.

摘要 ( )

可视化

12-Methoxypodocarpane-8,11,13-triene 1, the key intermediate in the synthesis of some important diterpenes, was synthesized in an efficient way, which has the characteristics of short route, simple operation and high yield.

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Concise Synthesis of (±)-epi-Chrysotricine

Guang Xing WANG, Jing Xin ZHANG, Shu Feng CHEN, Xiao Tian LIANG

中国化学快报. 2001, 12(03): 199-202.

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可视化

(±)epi-Chrysotricine 6 was synthesized by a cascade stereoselective oxidative cyclization of 5-hydroxyalkene 3 using tert-butyl hydroperoxide (TBHP) catalyzed by VO(acac)₂.

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A Concise Approach to the Synthesis of Carnosic Acid Type Diterpenes

Yu Xin CUI, Qiang XIAO, Peng Fei TU

中国化学快报. 2001, 12(03): 203-204.

摘要 ( )

可视化

10-vinyl-8,11,13-podocatriene 8, which is a model of Carnosic acid type diterpenes, has been synthesized by an expeditious convergent synthetic approach.

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Chiral Synthesis of 13-Acetyl-12-hydroxy-podocarpane-8, 11,13-triene-7-one

An Pai LI, Yong Hong GAN, Xiao Shui PENG, Tong Xing WU, Xin Fu PAN

中国化学快报. 2001, 12(03): 205-206.

摘要 ( )

可视化

An enantioselective synthetic route to (+)-13-acetyl-12-hydroxy-podocarpane-8,11,13-triene-7-one 1a and (-)-13-acetyl-12-hydroxy-podocarpane-8,11,13-triene-7-one 1b was developed from (S)-(-)-α-cyclocitral 8a and (R)-(+)-α-cyclocitral 8b.

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A Novel Synthesis of Dimethyl Malonate by Carbonylation of Methyl Chloroacetate Catalyzed by Cobalt Complex

Wei Hong SONG, Xuan Zhen JIANG

中国化学快报. 2001, 12(03): 207-210.

摘要 ( )

可视化

A novel method of preparing dimethyl malonate by carbonylation of methyl chloroacetate catalyzed by Na[Co(CO)₄] was proposed. Na[Co(CO)₄] was synthesized in situ in the presence of Na₂S₂O₃ and iron powder. The effects of some reaction parameters such as temperature, CO pressure and the concentrations of catalyst on the yields of dimethyl malonate were discussed. The kinetic data were studied and a possible reaction mechanism was proposed.

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Oxidative Degradation of 2,4,6-Trichlorophenol in the Presence of Air Ions

Hui Min MA, Jens WOHLERS, Uwe MEIERHENRICH, Axel BERNECKER, Vera SULING, Wolfram THIEMANN

中国化学快报. 2001, 12(03): 211-214.

摘要 ( )

可视化

2,4,6-trichlorophenol (TCP) was firstly treated with air ions generated by electric discharge, and high dechlorination (53%) was observed after 60 min treatment, indicating that air ions are an efficient dechlorination means and might have a future in the oxidative removal of chlorinated phenols. In addition, a stepwise degradation of TCP, beginning with the formation of a major product 2,6-dichloro-1,4-benzenediol via substitution, is proposed through a detailed analysis of gas chromatography/mass spectrometry.

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Protonation and Dehydrogenation During the Multiphoton Ionization of the Cluster:C₄H₅N(H₂O)_n

Yong Jun HU, Yong CAI, Ri Chang LU, Nan Quan LOU, Xiu Yan WANG

中国化学快报. 2001, 12(03): 215-218.

摘要 ( )

可视化

Multiphoton ionization (MPI) of the hydrogen-bonded clusters C₄H₅N-(H₂O)_m was studied with a time of flight (TOF) mass spectrometer at 355 nm. Series of the pyrrole-watercluster ions were observed, including unprotonated cluster ions[C₄H₅N-(H₂O)_n]⁺, protonated cluster ions[C₄H₅N-(H₂O)_nH]⁺ and dehydrogenated cluster ions[C₄H₄N-(H₂O)_n]⁺. Both the experimental and ab initio calculated results agree with that the dehydrogenation has more probabilities to occur while the value of n is raised.

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On the Structure of the Arginine-carboxylate Salt Bridge:A Density Functional Theory Study

Ting Wei MU, Yong FENG, Lei LIU, Qing Xiang GUO

中国化学快报. 2001, 12(03): 219-222.

摘要 ( )

可视化

High-level density functional theory (DFT) calculations are performed for the first time to answer the question whether the arginine-carboxylate salt bridge stays in a zwitterionic state or a neutral one. The results indicate that in the gas phase, the neutral form is more stable and hence proton transfer occurs from guanidinium to carboxylate. However, in an aqueous solution the zwitterionic form should be favored. The difference might be caused by the electrostatic interaction between the salt bridge and its molecular environment. Therefore, the solvation effect has to be considered in the modeling of proteins, whose stabilization depends heavily on the saltbridges.

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Two-Parameter Stochastic Resonance in a Model of Electrodissolution of Fe in H₂SO₄

Zong Xin PI, Hou Wen XIN

中国化学快报. 2001, 12(03): 223-226.

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可视化

Stochastic resonance (SR) is shown in a two-parameter system, a model of electrodissolution of Fe in H₂SO₄. Modulation of two different parameters by a periodic signal in one parameter and noise in the other parameter is found to give rise to SR. The result indicates that the noise can enlarge a weak periodic signal and lead the system to order. The scenario and novel aspects of SR in this system are discussed.

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Tsaokoin, a New Bicyclic Nonane from Amomum tsao-ko

Qi Shi SONG, Rong Wei TENG, Xi Kui LIU, Chong Ren YANG

中国化学快报. 2001, 12(03): 227-230.

摘要 ( )

可视化

7α-Hydroxy-8β,9β-H-cis-bicyclo[4,3,0]non-4-ene-4-aldehyde, a nonane compound with novel skeleton, named tsaokoin, was isolated from the fruits of Amomum tsao-ko. Its structure was established on the basis of spectral analysis.

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A New Flavone Glycoside from Isodon enanderianus

Zhi NA, Shuang Xi MEI, Chao Ming LI, Zhong Wen LIN, Han Dong SUN

中国化学快报. 2001, 12(03): 231-232.

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可视化

A new flavone glycoside, 5,8-dihydroxy-4',6,7-trimethoxyflavone 8-O-β-Dglucopyranoside 1, together with three known flavonoids, pedalitin 2, cirsimartin 3 and genkwanin 4, were isolated from the aerial parts of Isodon enanderianus. Their structures were determined on the basis of spectral data.

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A New Flavanone from the Bark of Morus macoura Miq.

Sheng Guo SUN, Ruo Yun CHEN, De Quan YU

中国化学快报. 2001, 12(03): 233-234.

摘要 ( )

可视化

A new flavanone named macrouroine C (1) was isolated from the bark of Morus macroura Miq.. The structure of 1 was elucidated mainly on the basis of spectroscopic evidence.

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Novel Chromone Derivatives from Marine Fungus Aspergillus versicolor Isolated from the Sponge Xestospongia exigua

Wen Han LIN, Hong Zheng FU, Jun LI, Peter Proksch

中国化学快报. 2001, 12(03): 235-238.

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From the marine sponge Xestospongia exigua, fungal isolates of Aspergillus versicolor (Vuill) Triab were obtained. Isolation and purification of ethyl acetate extracts from culture filtrates of the fungus led to yield six new chromone derivatives namely aspergione A, aspergione B, aspergione C, aspergione D, aspergione E, aspergione F. The structures of all the new compounds were established on the bas is of extensive spectroscopy (UV, MS, ¹H and ¹³C NMR, COSY, HMQC and HMBC) analysis.

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Two New Dammarane Glycosides from the Acid Hydrolysis Product of Panax Notoginseng

Rong Wei TENG, Hai Zhou LI, Xue Mei ZHANG, Xi Kui LIU, De Zu WANG, Chong Ren YANG

中国化学快报. 2001, 12(03): 239-242.

摘要 ( )

可视化

Two new dammarane glycosides named notoginsenoside T₁ and T₂ were isolated from the mild acid hydrolysis products of the root saponins of Panax notoginseng. On the basis of spectroscopic evidences, their structures were elucidated to be 6-O-β-D-glucopyranosyl-24(25)-epoxy-3β,6α,12β,23 ζ-tetrahydroxydammar-20(22)(E)-ene 1 and 6-O-β-D-glucopyranosyl-24(25)-epoxy-23 ζ-methoxyl-3β,6α,12β-trihydroxydamm-ar-20(22)(E)-ene 2, respectively.

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A New Indole Alkaloid from Limonia Crenulata

Xue Mei NIU, Sheng Hong LI, Li Yan PENG, Gao Xiong RAO, Han Dong SUN

中国化学快报. 2001, 12(03): 243-244.

摘要 ( )

可视化

A new indole alkaloid, crenulatine 1, was isolated from the stems of Limonia Crenulata. The structure was identified by spectral means.

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A Novel Ursane Triterpene from Rubus swinhoei

Wei Quan ZHAO, Li Sheng DING, Qiang ZHANG, Ming Kui WANG

中国化学快报. 2001, 12(03): 245-246.

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可视化

A novel ursane triterpene, named swinhoeic acid, was isolated from the roots of Rubus swinhoei. Its structure was elucidated as 18, 19-seco, 2α, 3β-dihydroxy-19-oxo-urs-11, 13(18)-dien-28-oic acid by means of MS, 1DNMR and 2DNMR.

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A New Norditerpene from Miliusa balansae Finet et Gagnep

Rui WU, Qi YE, Neng Yu CHEN, Guo Lin ZHANG

中国化学快报. 2001, 12(03): 247-248.

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可视化

A novel norditerpene, miliusate (1), was isolated from Miliusa balansae Finet et Gagnep. Its structure was elucidated by spectral analysis.

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A Novel Catalyst for CO₂ Reforming of CH₄

Chuan Jing HUANG, Xiao Ming ZHENG, Liu Ye MO, Jin Hua FEI

中国化学快报. 2001, 12(03): 249-252.

摘要 ( )

可视化

A novel Ni-Co/SiO₂ catalyst which exhibits high activity and excellent anti-carbon deposition property for CO₂ reforming of CH₄ to synthesis gas is developed.

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Sol-Gel Method for Preparation of LiLaNiO/γ-Al₂O₃ Catalyst over Monoliths used in POM Reaction

Ran RAN, Guo Xing XIONG, Yu Hong ZHANG, Shi Shan SHENG, Wei Shen YANG

中国化学快报. 2001, 12(03): 253-256.

摘要 ( )

可视化

A new method for preparing LiLaNiO/γ-Al₂O₃ monolithic catalyst was described and discussed. The catalyst, which was supported over the monolith, was evaluated in a POM to syngas process. Relative stable catalytic properties during the 120 hours operation at atmospheric pressure were found for the catalyst. Under the high space velocity of 9.0×10⁴l/(kg·h)(CH₄), the conversion of methane came to 95.5%, and the selectivity of carbon monoxide was not below 96.0% at 1123K when ratio of the feedstock (CH₄/O₂) was equal to 2.0.

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A New Type of Polymer-Supported Metallocene Catalyst for Ethylene Polymerization

Guang Qian YU, De Ze ZHANG, Fu SHUN, Li Jun QIAO, Tao TANG, Bao Tong HUANG

中国化学快报. 2001, 12(03): 257-260.

摘要 ( )

可视化

A new polymer-supported metallocene catalyst has been prepared. The polymersupported metallocene displayed considerably high activity in ethylene polymerization,the highest being 3.62×10⁷gPE/molZr·h, the molecular weight of the polyethylene produced was Mn=1.29×10⁵, about 3-4 times those of corresponding homogeneous zirconocenes. The polymersupported metallocene keeps the characteristics of homogeneous metallocene catalysts, and offers some features,such as adaptable to gas phase and slurry processes; easy to prepare in low cost; relatively high activity and lower MAO/Zr ratio; lower inorganic residues in the polyolefins as compared to cases of SiO₂,Al₂O₃ or MgCl₂; unitary active structure, no complex surface as with SiO₂; good control of morphology of the resulting polymer.

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A New Rapid Determination Method of Soil Organic Carbon Adsorption Coefficients of Pesticides with Soil Column Liquid Chromatography

Wei Min WANG, Xin Miao LIANG, Qing ZHANG

中国化学快报. 2001, 12(03): 261-264.

摘要 ( )

可视化

Soil column liquid chromatography (SCLC) was developed to determine soil organic carbon adsorption coefficients (K_oc) for chemicals. The uptake by soil of pesticides from water can be conveniently calculated from the related breakthrough curves (BTC). The nine pesticides chosen for determination in this study are soluble ones, with their water solubility ranging from 62 mg/L to 2 mg/L. In comparing with existing methods of K_oc, SCLC possesses rapid, online and accurate characteristics.

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On-Line Multichannel Raman Spectroscopic Detection System For Capillary Zone Electrophoresis

Zhong LI, Yu Jie WANG, Guo Quan LIU, Yi CHEN

中国化学快报. 2001, 12(03): 265-266.

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可视化

An on-line multichannel Raman spectroscopic detection system for capillary electrophoresis was established by using an Ar⁺ laser and a cryogenically cooled ICCD. Resonant excitation Raman spectra of methyl red and methyl orange were employed to test the system. The result shows that it could yield on-line electrophoretogram and time series of Raman spectra.

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A New Chemiluminescent Triazine Reagent

Quan Li MA, Mei Hong SU, Hui Min MA, Zhi Hua WANG, Shu Chuan LIANG

中国化学快报. 2001, 12(03): 267-268.

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可视化

A new chemiluminescent reagent 7-(4,6-dichloro-1,3,5-triazinylamino)-4-methylcoumarin (DTMC) was synthesized by linking 7-amino-4-methylcoumarin to cyanuric chloride at 0-5℃, and with it a novel chemiluminescence method was developed for the determination of hydrogen peroxide. The selectivity of this method is high, and most of the transition metal ions have no effect on the determination of H₂O₂.

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Electrochemistry and Electrocatalysis with Hemoglobin in DHPPDDA Surfactant-Polymer Multibilayer Composite Films

Nai Fei HU, Hong Yun LIU, Li Wen WANG

中国化学快报. 2001, 12(03): 269-270.

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可视化

Polyionic complex DHP-PDDA was prepared by reacting anionic surfactant dihexadecyl phosphate (DHP) with polycationic poly(diallyldimethyl ammonium) (PDDA). Thin films made from DHP-PDDA with incorporated hemoglobin (Hb) on pyrolytic graphite (PG) electrodes were characterized by electrochemistry and other techniques.

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The Aggregates in LB Films of Schiff base Aluminium (III) Complex

Wei CAO, Wei LIAN, Yu Bai BAI, Chun Yan LIU, Hui Bo SHAO

中国化学快报. 2001, 12(03): 271-272.

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可视化

The surface pressure-area (π-A) isotherm of Schiff base aluminium (III), tris (2-hydroxy-5-nitro-N-dodecyl-benzylideneaminato) aluminium (III) (denoted as Al(TA12)₃), on pure water subphase was investigated. The molecular area, 0.48 nm², is one-third of expected value that indicated the aggregation took place. The Langmuir-Blodgett (LB) films of Al(TA12)₃ was transferred and characterized. The AFM image confirmed the formation of aggregates.

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Dynamic Rheological Characterization of A Thermotropic Liquid Crystalline Poly (aryl ether ketone)

Hui SUN, Wan Jin ZHANG, Zhong Wen WU, Li Wei LI, Bi Bo YANG, Qiang ZHENG

中国化学快报. 2001, 12(03): 273-274.

摘要 ( )

可视化

The rheometrics ARES rheometer was applied to determining the rheological behavior of a thermotropic liquid crystalline poly (aryl ether ketone). The viscosity of the material decreases with increasing temperature, reaching a minimum in the nematic state, then slightly increases with further raising the temperature in the biphase.

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A New Method to Remove Neutral Template in the Synthesis of HMS

Qing Min ZHANG, Yan LI, Fu Zhi HUANG, Zhen Nan GU

中国化学快报. 2001, 12(03): 275-278.

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可视化

In the synthesis of HMS, Soxhlet extraction as a new method to remove neutral template was studied. HREM image, X-ray diffraction patterns and nitrogen adsorption-desorption results verified that this method can not only efficiently remove and recoverthe template, but also benefit the maintenance of the mesoporous framework structure.

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Synthesis, Structure and Properties of Tetrakis (thiourea) mercury (II) Tetrakis (thiocyanato-N) zinc (II)

Xue Ning JIANG, Dong XU, Duo Rong YUAN, Wen Tao YU, Meng Kai LU, Shi Yi GUO, Guang Hui ZHANG, Qi FANG

中国化学快报. 2001, 12(03): 279-282.

摘要 ( )

可视化

A new nonlinear optical complex crystal tetrakis (thiourea) mercury (II) tetrakis (thiocyanato-N) zinc (II) was synthesized and its structure was determined. It belongs to the tetragonal system, I4 space group. The crystal structure consists of discrete[Zn(SCN)₄]^2- anions and[Hg(NH₂CSNH₂)₄]²⁺ cations with slightly distorted coordination tetrahedra ZnN₄ and HgS₄. The second harmonic generation (SHG) of the crystal was found to be superior to that of urea.

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2001年, 第12卷, 第03期　刊出日期：2001-03-20

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本期目录

2001年, 第12卷, 第03期 刊出日期：2001-03-20

2001年, 第12卷, 第03期　刊出日期：2001-03-20