中国化学快报

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The Synthesis and Anion Binding of Novel Cholic Acid-based Molecular Clefts Containing Unsymmetrically Disubstituted Urea Unit

Qi Ming MU, Cui Hua XUE, Guo Lin ZHANG, Liang Bing WANG, Shu Hua CHEN

中国化学快报. 2003, 14(12): 1211-1214.

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A novel type of chiral molecular clefts consisting of a rigid deoxycholic acid methyl ester backbone and chiral unsymmetrically disubstituted urea side chain have been designed and synthesized. All these new receptors 3a~c and the corresponding key intermediates 1a~c and 2a~c are new compounds, their structures were confirmed by ¹HNMR, IR, MS spectra and elemental analysis. These molecular clefts showed binding ability for halide anions.

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An Expeditious Route for the Total Synthesis of Pondaplin Isolated from Annona glabra

Qian CHENG, Yan Wen ZHANG, Xiang ZHANG, Takayuki ORITANI

中国化学快报. 2003, 14(12): 1215-1218.

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A novel cyclic prenylated phenylpropanoid, pondaplin 1, was first synthesized in 26% overall yields through an expeditious route (7 steps) that employed highly regio-and stereoselective phenyltellurenylation to arylacetylene and palladium (II) chloride-catalyzed carbonylation of hydroxy styryl phenyl telluride as key steps.

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Synthesis of Novel Benzoylphenylurea Chitin Inhibitors from Chlorothalonil

Jun LIN, Sheng Jiao YAN, De Shou MAO, Rong XU, Li Juan YANG, Fu Chu LIU

中国化学快报. 2003, 14(12): 1219-1222.

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Twenty-six novel benzoylphenylurea chitin inhibitor derivatives have been synthesized in over 30~50% yield from chlorothalonil 1 via sequential fluorine exchange, aminolysis, hydrolysis, decarboxylation and acylation reactions.

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Synthesis and Bronchodilatory Activities of New Pyrazolo[4,3-d]pyrimidin-7-ones

Dun WANG, Yan Fang ZHAO, De Sheng YU, Ping GONG

中国化学快报. 2003, 14(12): 1223-1226.

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Twelve novel pyrazolo[4,3-d] pyrimidin-7-ones were synthesized and their structures were confirmed by IR, ¹H NMR and MS. Their in vitro bronchodilatory activities were tested in guinea-pigs. The pharmacological results show that compound 11c has more potent activity than aminophylline.

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A Convenient Method for the Synthesis of Chiral N-Protected 1, 2-Amino Alcohols via the Reduction of the Aminoketones

Zheng Hong ZHOU, Yi Long TANG, Kang Ying LI, Bing LIU, Chu Chi TANG

中国化学快报. 2003, 14(12): 1227-1229.

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A series of optically active N-protected 1,2-amino alcohols were synthesized via the reduction of the corresponding α-aminoketones starting from the readily available L-amino acids.

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Synthesis and Properties of a Novel Photochromic Compound

Guang Fei LIU, Lang LIU, Dian Zeng JIA, Kai Bei YU

中国化学快报. 2003, 14(12): 1230-1232.

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A new photochromic compound containing pyrazolone-ring was synthesized, and its crystal structure was determined on X-ray singlecrystal diffraction, which belongs to monoclinic crystal system, space group P2₁/c. The UV spectrum of the compound is studied.

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A Novel Photoproduct of Thymine in Phosphate-buffered Saline under Far UV Irradiation

Feng LIN, Qing Ling MA

中国化学快报. 2003, 14(12): 1233-1235.

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The photolysis of thymine in phosphate-buffered saline (PBS, pH 8.0) under the irradiation of medium pressure mercury lamp (MPML) produces a novel compound C₅H₇N₂O₆P. The composition and structure of the compound have been identified by elemental analysis, EI-MS, UV, IR, ¹H, ¹³C, ³¹P-NMR.

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Catalysis Conversion Methane into C₂ Hydrocarbons via Electric Field Enhanced Plasma

Bao Wei WANG, Gen Hui XU

中国化学快报. 2003, 14(12): 1236-1238.

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In this paper the effect of catalyst and carrier in electric field enhanced plasma on methane conversion into C₂ hydrocarbons was investigated. Methane coupling reaction was studied in the system of continuous flow reactor on Ni, MoO₃, MnO₂ catalysts and different ZSM-5 carriers. The per pass conversion of methane can be as high as 22%, the selectivity of ethylene can be as high as 23.8%, of acetylene 60.8%, of ethane 5.4% and of total C₂ hydrocarbons was more than 90%. ZSM-5-25 was the better carrier and MnO₂ was the better active component. The efficiency of energy was as high as 7.81%.

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Uncatalyzed Condensation Reactions between Aromatic Aldehydes and Thiobarbituric Acid in Water

Bing Qin YANG, Jun LU, Min TIAN

中国化学快报. 2003, 14(12): 1239-1241.

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A series of 5-arylidene thiobarbituric acids were prepared from aromatic aldehydes and thiobarbituric acid in water without catalyst conditions in good yields. The structures were characterized by elemental analysis, IR and ¹H NMR spectra.

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The Condensation of Aromatic Aldehydes with Acidic Methylene Compounds in Water

Da Qing SHI, Jing CHEN, Qi Ya ZHUANG, Xiang Shan WANG, Hong Wen HU

中国化学快报. 2003, 14(12): 1242-1245.

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The condensation of aromatic aldehydes with acidic methylene compounds such as malononitrile, methyl cyanoacetate, cyanoacetamide, 5,5-dimethyl-1,3-cyclohexanedione, bartbituric acid and 2-thiobarbituric acid proceeded very efficiently in water in the presence of triethylbenzylammonium chloride (TEBA) and the products were isolated simply by filtration.

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Facile Synthesis of Ferrocenylenones in Free Solvent at Room Temperature

Shun Jun JI, Shun Yi WANG, Zhi Liang SHEN, Ming Feng ZHOU

中国化学快报. 2003, 14(12): 1246-1248.

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The rate of formation of aldol condensation products by being ground acetylferrocene and various aromatic aldehydes without solvent was dramatically enhanced comparing to the conventional methods. The yield is high (84%-96%) at room temperature.

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A New Method to Synthesize Polytitanosilazane as Ceramic Precursor

Zhi Min ZHENG, Yong Ming LI, Yong Ming LUO, Shun Xing SU, Zhi Jie ZHANG, Shi Yan YANG, Wei GAO, Ze Min XIE

中国化学快报. 2003, 14(12): 1249-1252.

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A new kind of polytitanosilazane precursor PTSZ for Si/C/N/Ti-based ceramic was synthesized from the condensation reaction of silazane lithium salt and titanium tetrachloride (TiCl₄). The results indicated that the ceramic yield of PTSZ was much higher than that of corresponding silazane oligomer.

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A New Isopropenyl Benzofuran-type Tetramer from Ligularia stenocephala

Fu Lin YAN, Ai Xia WANG, Zhong Jian JIA, Lei HE

中国化学快报. 2003, 14(12): 1253-1254.

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A new isopropenyl benzofuran-type tetramer was isolated from the roots of ligularia stenocephala and its structure was established by spectroscopic methods.

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Bandunamide, a Novel Cyclopeptide from the Streptomyces Griseovariabilis bandungensis

Xing Shan TIAN, Shuang Da XIE, Xue Bing JIANG, Xiao Mao ZHOU, Li Mei YANG, Ding Jun XIAO

中国化学快报. 2003, 14(12): 1255-1258.

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A new cyclic octapeptide, bandunamide, was isolated from the acetone extracts of streptomyces griseovariabilis bandungensis. This cyclic octapeptide exhibits strong antimicrobial activity against Phytophthora drechsleri (IC₅₀=15 ng/mL), Colletotrchum higginsiannum (IC₅₀=15.6 ng/mL), Piricularia oxyzae (IC₅₀=0.2 μg/mL), and Fusarium oxysporum f. Sp. (IC₅₀=100 μg/mL). The structure elucidation of bandunamide is herein reported.

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A New Furostanol Glycoside from Polygonatum odoratum

Hai Lin QIN, Zhi Hong LI, Peng WANG

中国化学快报. 2003, 14(12): 1259-1260.

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A new furostanol component glycosylated only at C-26 was isolated from the rhizomes of Polygonatum odoratum (Mill.) Druce, and its structure was characterized as 22-hydroxy-25(R and S) furost-5-en-12-on-3β, 22, 26-triol 26-O-β-D-glucopyranoside on the basis of spectroscopic techniques and chemical methods.

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Dracaenoside A and B, New C-22 Steroidal Lactone Glycosides from the Stem of Dracaena cochinchinensis

Qing An ZHENG, Chong Ren YANG

中国化学快报. 2003, 14(12): 1261-1264.

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Two new C-22 steroidal lactone glycosides, named dracaenoside A and B were isolated from the methanol extract of the fresh stem of Dracaena cochinchinensis. Their structures were established as (20S)3β,14α,16β-trihydroxy pregn-5-ene-22-carboxylic acid (22,16)-lactone 3-O-α-L-rhamnopyranosyl (1→2)[α-L-rhamnopyranosyl (1→4)]-β-D-glucopyranoside and (20S)3β, 14α, 16β-trihydroxy pregn-5-ene-22-carboxylic acid (22,16)-lactone 3-O-α-L-rhamnopyranosyl (1→2)[(-D-glucopyranosyl(1→3)]-β-D-glucopyranoside by means of 2D NMR spectral and chemical methods. It is the first time that steroidal lactone glycosides were isolated from the genus Dracaena.

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Two New Cycloartane Triterpenes from The Leaves of Quercus valiabilis Blume

Li Hong ZHOU, Qi Shi SUN, Yan WANG

中国化学快报. 2003, 14(12): 1265-1267.

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Two new cycloartane triterpenes were separated from the leaves of Quercus valiabilis Blume. The structures were identified as 4α,14α-dimethyl-9β,19-cycloergost-3α-yl-24-one and 4α,14α-dimethyl-9β,19-cycloergost-24(24')-en-3α-yl-acetate.

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New Acetylated Flavonol Glycosides from Knoxia corymbosa

Yu Bo WANG, Jian Xin PU, Hai Ying REN, Jing Feng ZHAO, Shuang Xi MEI, Zi Yan LI, Hong Bin ZHANG, Liang LI

中国化学快报. 2003, 14(12): 1268-1270.

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Two new diacetylated flavonol glycosides, kampferol-3-O-β-3", 6"-diacetylglucopyrano- side and quercetin-3-O-β-3", 6"-diacetylglucopyranoside were isolated from knoxia corymbosa. Their structures were elucidated by spectroscopic evidents.

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Two New Lactones Metabolized from Isoline by Rat Liver Microsomes

Jun TANG, Zheng Tao WANG, Teruaki AKAO, Norio NAKAMURA, Masao HATTORI

中国化学快报. 2003, 14(12): 1271-1274.

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Two new metabolites, namely bisline lactone and isolinecic acid lactone, were isolated from the resultant incubates after a scale-up incubation of isoline with rat liver microsomes. Their structures were determined by spectroscopic data, especially those from 1D and 2D NMR experiments.

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Studies on the Interaction of Beryllon Ш with Proteins by Voltammetric Technique and its Application

Wei SUN, Kui JIAO, Xue Liang WANG, Lu De LU

中国化学快报. 2003, 14(12): 1275-1277.

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A new quantitative determination method of proteins using beryllon Ш by voltammetric technique was developed in this paper. In pH 3.5 Britton-Robinson (B-R) buffer solution, beryllon Ш can bind with human serum albumin (HSA) to form an electro-inactive supermolecular complex. Beryllon Ш has a well-defined voltammetric reduction peak at -0.38 V (vs. SCE) and the addition of protein in this solution can cause the decrease of the reductive peak current. Based on the decrease of the reduction peak current, a new electrochemical method for the determination of HSA was established with linear range of 1.0~40.0 mg/L and the detection limit of 1.0 mg/L. This method is further applied to the determination of real sample of healthy human serum.

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DNA Separation by Capillary Electrophoresis with Ultraviolet Detection using Mixed Synthetic Polymers

Qian WANG, Xu XU

中国化学快报. 2003, 14(12): 1278-1280.

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The mixtures of two polymers, poly (N,N-dimethylacrylamide) (PDMA) and polyvinylpyrrolidone (PVP) were synthesized and used as the separation medium for double-stranded and single-stranded DNA fragments by capillary electrophoresis with UV detector. On optimal conditions, 2%w/v PDMA (2%w/v PVP can be used to separate the doublet 123/124bp in pBR322/Hae III Markers.

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A Novel Chemical Oscillator with Tyrosine as the Substrate

Wu YANG, Jie REN, Jin Zhang GAO, Hua YANG, Dong Yu LÜ, Xiu Hui LIU

中国化学快报. 2003, 14(12): 1281-1284.

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A new chemical oscillating reaction system involving the manganese(II)-catalyzed reaction among potassium bromate, acetone and tyrosine in acidic medium was described in this paper. The apparent activation energy of the induction period (E_in) and that of oscillation period (E_p) were calculated, E_in=110.61 KJ/mol, E_p=159.41KJ/mol. The optimum concentration of each reactant was investigated and a steady chemical oscillating system was obtained.

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Gallery-templated Synthesis of Titanium/Silicon-containing Mesoporous Montmorillonite-based Catalytic Materials

Chun Hui ZHOU, Zhong Hua GE, Xiao Nian LI, Hong Qiang GUO, Jian SUN

中国化学快报. 2003, 14(12): 1285-1288.

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A mesoporous titanium/silicon-containing montmorillonite-based catalytic materials has been synthesized by novel gallery-templated techniques. XRD, SEM, framework IR, and N₂ adsorption-desorption isotherms provided evidence of the formation of Si/Ti pillars. The synthetic materials show potential catalytic application for hydroxylation of phenol with peroxide.

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Synthesis of Comblike Poly(methyl methacrylate) by Atom Transfer Radical Polymerization with Poly(ethyl 2-bromoacrylate) as Macroinitiator

Yan SHI, Zhi Feng FU, Yu Dong ZHANG, Shu Ke JIAO

中国化学快报. 2003, 14(12): 1289-1292.

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Comblike poly(methyl methacrylate) was synthesized by atom transfer radical polymerization of methyl methacrylate with poly(ethyl 2-bromoacrylate) as a macroinitiator, which was prepared by conventional free radical polymerization of ethyl 2-bromoacrylate. The obtained comblike polymers were characterized by GPC and ¹H NMR.

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Coating Carbon Nanotubes with Europium Oxide

Hui Qun CAO, Guang Yan HONG, Jing Hui YAN, Ji Lin ZHANG, Gui Xia LIU

中国化学快报. 2003, 14(12): 1293-1295.

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Carbon nanotubes (CNTS) coating with europium oxide by a simple method is reported in this letter for the first time. The CNTS were refluxed in a solution of nitric acid containing europium nitrate, and the pH value was subsequently ajusted with ammonia solution. At last, the mixture was filtered and annealed. The TEM micrograph showed that the CNTS were covered with a uniform thin layer with thickness of about 15 nm. The XRD results revealed that the CNTS were coated with europium oxide.

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Charge-discharge Behavior of Surface-coated LiMn₂O_3.95F_0.05 Cathode Materials at High Temperature

Zhao Yong CHEN, Yan Rong LI, Zuo Long YU

中国化学快报. 2003, 14(12): 1296-1298.

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With inorganic salts such as LiNO₃, Li₂CO₃, surface-coated LiMn₂O_3.95F_0.05 were prepared by melt-impregnation method. When these surface-coated LiMn₂O_3.95F_0.05 were used as cathode materials, their charge-discharge characters were carefully compared. As a result, they exhibited good charge-discharge properties at 50℃ high temperature. Especially, LiNO₃ surface-coated LiMn₂O_3.95F_0.05 retained nearly 80% initial reversible capacity after 130 cycles at 50℃.

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Hollow Cancrinite Zeolite Spheres in situ Transformed from Fly Ash Cenosphere

De Ju WANG, Yi TANG, An Gang DONG, Ya Hong ZHANG, Ya Jun WANG

中国化学快报. 2003, 14(12): 1299-1302.

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A novel hollow microsphere structure with cancrinite zeolite grown from the shell of fly ash cenosphere has been successfully prepared through in situ transformation in vapor phase; the orientation and morphology of cancrinite can be greatly improved by adding tetrapropylammonium hydrate into the synthetic system.

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Synthesis and Electrochemical Property of Calcium Doped LiNi_0.8Co_0.2O₂ Solid Solution

Jin Long WANG, Zi Cheng LI, Bin XIONG, Lei XIE, Liang Jie YUAN, Ju Tang SUN

中国化学快报. 2003, 14(12): 1303-1305.

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A divalent ion doped LiNi_0.8Co_0.2O₂ solid solution, LiNi_0.79Co_0.20Ca_0.01O₂, was synthesized in air at 720℃. The structure and electrochemical property as cathode material of lithium ion batteries were measured by XRD and charge-discharge system. The solid solution showed high capacity and good cycle-ability. The second discharged capacity reached 190 mAh·g^-1 at the current density of 100 mA·g^-1.

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Rapid Fabrication of Hollow SiO₂ Spheres with Novel Morphology

Dong Jun WANG, Qun LUO, Dan Dan JIA, Xiao Dong LI, Xin Qiou WANG, Yong Huang, Zhen ZHEN, Xin Hou LIU

中国化学快报. 2003, 14(12): 1306-1308.

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The hydrolysis of tetraethoxysilane (TEOS) occurred on the surface of poly(methyl methacrylate) (PMMA) microshperes immediately after these microshperes were prepared in TEOS. Micron-sized hollow SiO₂ spheres were obtained by calcination of the coated PMMA microshperes. It was found that the final hollow spheres were constituted by small SiO₂ particles.

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Degradation Mechanism of Cationic Red X-GRL by Ozonation

Wei Rong ZHAO, Xin Hua XU, Hui Xiang SHI, Da Hui WANG

中国化学快报. 2003, 14(12): 1309-1312.

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The degradation mechanism of Cationic Red X-GRL was investigated when the intermediates, the nitrate ion and the pH were analyzed in the ozonation. The degradation of the Cationic Red X-GRL includes the de-auxochrome stage, the decolour stage, and the decomposition of fragment stage. During the degradation process, among the six nitrogen atoms of Cationic Red X-GRL, one is transferred into a nitrate ion, one becomes the form of an amine compound, and the rest four are transformed into two molecules of nitrogen. In the course of the ozonation of Cationic Red X-GRL, the direct attack of ozone is the main decolour effect.

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Theoretical Studies on the Spin Exchange Interaction in Copper(II) Complexes Coordinated with Nitronyl Nitroxide

Jie REN, Hai Yan WEI, Qi Hua ZHAO, Zhi Da CHEN

中国化学快报. 2003, 14(12): 1313-1316.

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Nitronyl nitroxide radical 1, NIT (4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxyl-3-oxide) and copper(II) chloride complexes with nitronyl nitroxide 2,[Cu(NITPh)₂Cl₂] (NITPh=2-phenyl-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) were studied with density functional theory (DFT). The magnetic orbital analysis reveals that the antiferromagnetic coupling for complex 2 is due to the antibonding σ^*-orbital overlap between d_x²-y² (Cu) and π^* (NO) orbitals. Also, spin population and atomic charge distribution analysis suggest that for AFS of complex 2 the antiferromagnetic coupling between the radical ligands and the copper(II) ion originates from the spin delocalization induced by the α electron transfer from π^*(NO) to d_x²-y² (Cu) orbital.

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Quasiclassical Trajectory Study of Collisional Energy Transfer between Highly Excited C₆F₆ and N₂,O₂ and Ground State C₆F₆

Jian Hua ZHOU, Shao Kun WANG, Zhi Jun YU, Hai Hui JIANG, Yue Shu GU

中国化学快报. 2003, 14(12): 1317-1320.

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Quasiclassical trajectory calculation (QCT) is used frequently for studying collisional energy transfer between highly vibrationally excited molecules and bath gases. In this paper, the QCT of the energy transfer between highly vibrationally excited C₆F₆ and N₂,O₂ and ground state C₆F₆ were performed. The results indicate that highly vibrationally excited C₆F₆ transferred vibrational energy to vibrational distribution of N₂, O₂and ground state C₆F₆, so they are V-V energy transfer. Especially it is mainly V-V resonance energy transfer between excited C₆F₆ and ground state C₆F₆, excited C₆F₆ transfers more vibrational energy to ground state C₆F₆ than to N₂ and O₂. The values of QCT,-<△E_vib>of excited C₆F₆ are smaller than those of experiments.

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2003年, 第14卷, 第12期　刊出日期：2003-12-20

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2003年, 第14卷, 第12期 刊出日期：2003-12-20

2003年, 第14卷, 第12期　刊出日期：2003-12-20