2001年, 第12卷, 第12期　刊出日期：2001-12-20

  

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  Chitosan-supported Borohydride Reducing Agent

  Cai Qin QIN, Ling XIAO, Yu Min DU

  中国化学快报. 2001, 12(12): 1051-1052.

  摘要 ( ) 可视化 收藏

  A new chitosan-supported borohydride reducing reagent (CBER) was prepared by treatment of KBH₄ with the resin of chitosan derivative, which was first synthesized from the reaction of cross-linked chitosan microsphere with glycidyl trimethylammonium chloride. CBER could reduce aromatic carbonyl compound to corresponding alcohol.
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  1,3-Dipolar Cycloaddition Reaction between Vinyl Acetate and N-Alkyl Hydroxypyridinium Halide

  Shun Fu ZHOU, Jing Yu SU, Long Mei ZENG

  中国化学快报. 2001, 12(12): 1053-1054.

  摘要 ( ) 可视化 收藏

  1, 3 Dipolar cycloaddition reaction between vinyl acetate and 3-hydroxypyridiniun betaine was performed under solid-liquid phase transfer catalytic condition. This reaction has been successfully used on the synthesis of an analogue of Bao-Gong-Teng A.
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  Asymmetric Addition of Diethylzinc to Aldehydes Catalyzed by Chiral γ-Amino Alcohols

  Qian Yong XU, Tong Xing WU, Xin Fu PAN

  中国化学快报. 2001, 12(12): 1055-1056.

  摘要 ( ) 可视化 收藏

  New chiral γ-amino alcohols 1-4 were synthesized and applied in the asymmetric addition of diethylzinc to aldehydes to give sec-alcohol with up to 94.0% enantiomeric excess.
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  Reactions of Podophyllotoxin with DDQ

  Qian Rong LI, Ting Hu ZHANG, Robert S. WARD

  中国化学快报. 2001, 12(12): 1057-1060.

  摘要 ( ) 可视化 收藏

  Podophyllotoxin 1 reacts with DDQ in acetic acid to give podophyllotoxone 2 at 75℃ and the naphthol 3 at 90℃, and in TFA to give the naphthalene 4. 4'-O-Benzyl-epipodophyllotoxin 5 reacts with DDQ in acetic acid at 70℃ to give the acetate 8. The structural elucidation of these products is described.
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  One-Pot Synthesis of N-Boc-2, 5-bis(trimethylsilyl)pyrrolidine

  Jing Chao DONG, Run Tao LI, Tie Ming CHENG

  中国化学快报. 2001, 12(12): 1061-1064.

  摘要 ( ) 可视化 收藏

  N-Boc-2, 5-bis(trimethylsilyl)pyrrolidine 4 was synthesized from the reaction of N-Boc-pyrrolidine 1 with trimethylsilyl chloride (TMSCl) at optional temperature in one-pot in good yield.
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  Facile Synthesis of Five-membered Phosphoroheterocycles Bearing N-P-N and S-P-N Moieties

  Sheng Lou DENG, Dong Zhi LIU, Ru Yu CHEN

  中国化学快报. 2001, 12(12): 1065-1068.

  摘要 ( ) 可视化 收藏

  New reactions of Lawesson reagent (LR) with a-hydroxy (amino)nitriles have been studied. The experimental results showed that the five-membered phosphoroheterocycles 2 and 4 bearing N-P-N or S-P-N moiety could be readily prepared in high yields. Meanwhile, the possible mechanism of the reactions was also discussed.
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  Synthesis of 1-(3',4'-dihydroxyphenyl)-7-(4"-hydroxyphenyl)-4hepten-3-one

  Yun Gen LIU, Shao Bai LI

  中国化学快报. 2001, 12(12): 1069-1070.

  摘要 ( ) 可视化 收藏

  The diarylheptanoids 1-(3',4'-dihydroxyphenyl)-7-(4"-hydroxyphenyl)-4-hepten-3-one 1 and 1-(3',4'-dihydroxyphenyl)-7-(4"-hydroxyphenyl)-5-hydroxy-3-heptanone 2 were synthesized from piperonal 3 and 4-hydroxybenzaldehyde 11.
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  An Efficient Synthesis of 2-Propyl-5-phenyl-1,4-dioxo-1,2,3,4,5,6,7,8-octahydro-[1,4,2] diazaphosphorino[1,2-a] [1,3,2] benzodiazaphosphorine 3-oxide

  Jun Min HUANG, Ru Yu CHEN

  中国化学快报. 2001, 12(12): 1071-1074.

  摘要 ( ) 可视化 收藏

  The novel 2-propyl-5-phenyl-1, 4-dioxo-1,2,3,4,5,6,7,8-octahydro-[1,4,2] diaza phosphorino[1,2-a] [1,3,2]benzodiazaphosphorine 3-oxide has been synthesized by incorporating the proximate carbonyl and phosphoryl groups into the benzoannulated phosphdiamide heterocycle in good yield.
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  Synthesis, and Investigation of the Reactive Oxygen Species of a Novel Cyclicpeptide-2,6-dimethoxyhydroquinone-3-mercaptoacetic Acid Conjugate

  Yu Fei SONG, Hui Min ZHEN

  中国化学快报. 2001, 12(12): 1075-1078.

  摘要 ( ) 可视化 收藏

  In this paper, we report the synthesis of a potential anti-cancer agent:Cyclo[Val-Lys(DMQ-MA)-Gaba]. The cytotoxic agent conjugated to the N-terminal and the ξ-amino group of lysine of the tripeptide is 2,6-dimethoxyhydroquinone-3-mercaptoacetic acid (DMQ-MA). By employing the rhodamine B degradation method and ESR spectra, we testify the reactive oxygen species——hydroxyl radicals produced by the drug.
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  Enantioselective Synthesis of Chiral 1-Ferrocenyl Alcohol via CBS-Reduction

  Wei Yi CHEN, Jun LU, Ya Wen ZHANG, Zong Xuan SHEN

  中国化学快报. 2001, 12(12): 1079-1080.

  摘要 ( ) 可视化 收藏

  Reduction of prochiral ferrocenyl ketones 2a-e in the presence of 10 mol% of chiral β-amino alcohols 4a-b provides 1-ferrocenyl alcohols 1a-e in high yields (>85%) with high optically purity (e.e. up to 96%).
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  Synthesis of Chitosan Quaternary Ammonium Salts

  Wei Liang XU, Jun WU, Chun Ling FU

  中国化学快报. 2001, 12(12): 1081-1084.

  摘要 ( ) 可视化 收藏

  A series of N-alkyl or N-aryl chitosan quaternary ammonium salts were prepared via Schiff's base intermediates. Quaternization of N-substituted chitosan derivatives was carried out using methyl iodide to produce water-soluble cationic chitosan quaternary ammonium salt. The products were characterized by IR, ¹HNMR and elemental analysis. The degree of substitution of chitosan quaternary ammonium salt was calculated by elemental analysis.
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  Synthesis, Characterization and Biological Activities of Novel Water-soluble Metalloporphyrins

  Zao Ying LI, Yue Ning ZHANG, Zhen Ting GAO, Yi LIU, Xun Jin ZHU

  中国化学快报. 2001, 12(12): 1085-1088.

  摘要 ( ) 可视化 收藏

  The synthesis, characterization, and biological activities of a series of metal porphyrins were described. The complexes 3a~3e were prepared from the reaction of compound 2 with M(OAc)₂ in CHCl₃, and the treatment of 3a~3f with pyridine gave corresponding complexes 4a~4f. These new compounds were identified by absorption spectroscopies, ¹H NMR and elemental analysis. The results of biological activity testing revealed that 4a and 4c had stronger inhibiting action for Escherichia coli (CCTCC AB91115).
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  Study on the Interaction of Mitomycin C with ct-DNA by Pd-Porphin Room Temperature Phosphorescence Probe

  Wei LI, Wen YUAN, Wei Jun JIN, Chuan DONG

  中国化学快报. 2001, 12(12): 1089-1092.

  摘要 ( ) 可视化 收藏

  Anticancer drug Mitomycin C (MMC) quenches remarkably phosphorescence and reduces lifetime of phosphorescence probe, Pd-meso-tetrakis-(4-trimethylaminophenyl) porphin (Pd-TAPP), in the presence of calf thymus DNA. These results may be attributed to the site competition of MMC with the probe and electron transfer between MMC and probe. MMC also increases polarization degree of the probe by covalent drug-DNA or DNA-drug-DNA crosslinking.
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  Theoretical Study on the Activity of α-COOH and β-COOH of N-Phosphoryl Aspartic Acids

  Zhong Zhou CHEN, Bo TAN, Yan Mei LI, Yu Fen ZHAO

  中国化学快报. 2001, 12(12): 1093-1096.

  摘要 ( ) 可视化 收藏

  The bio-mimic reactions of N-phosphoryl amino acids are very important in the study of many biochemical processes. The difference of reactivity between α-COOH and β-COOH in phosphoryl aspartic acid was studied by theoretical study (Hartree-Fock and Density Functional methods) in this paper. The intermediates II containing five-membered ring were more stable than III with six-membered ring. While for intermediates III, the isomers with six-membered ring in apical-equatorial spanning arrangement were more stable than those with di-equatorial spanning arrangement. At B3LYP/6-31G^** level, it was shown that transition states IV and V involving α-COOH or β-COOH group had energy barriers of ΔE=58.67 kJ·mol^-1 and 103.94 kJ·mol^-1, respectively. These results were in agreement with the experimental data. So the α-COOH group was involved in form of the intramolecular penta-coordinate phosphoric-carboxylic mixed anhydride intermediates, but not β-COOH group.
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  Dual-parameter Correlation Analysis of the Redox Potential Data of 1-Methyl-2-formyl-5-substituted Pyrroles and their Hydrazones

  Hai Ying HE, Chen Lin, Cheng Xue ZHAO, Xi Kui JIANG

  中国化学快报. 2001, 12(12): 1097-1100.

  摘要 ( ) 可视化 收藏

  By using 1-methyl-2-formyl-5-substituted pyrroles (1-Y), 1-methyl-2-formyl-5-substituted pyrrole phenylhydrazones (2-Y) and 1-methyl-2-formyl-5-substituted pyrrole (4-nitro-phenyl)-hydrazones (3-Y) as model structures for nitrogen-containing heterocyclic aromatic compounds, correlation analysis of their redox potential data show that the transition states (TS) of the polarographic process are mainly affected by the polar effects, but spin-delocalizatin effects also exist.
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  Electrochemical Impedance Study of Schiff Base by Means of Self-assembled Monolayer

  Ke Qiang DING, Zhen Bin JIA, Qing Fei WANG, Na TIAN, Ru Ting TONG, Xin Kui WANG, Hui Bo SHAO

  中国化学快报. 2001, 12(12): 1101-1104.

  摘要 ( ) 可视化 收藏

  In this work, the self-assembled monolayer of Schiff base was first investigated using electrochemical impedance spectroscopy (EIS). The complexation of Cu²⁺ with the Schiff base was also detected with EIS method. The approximate linear relationship between Cu²⁺ and the reaction resistance (R_r) was observed. All the results suggest that the electrochemical property of Schiff base could be studied conveniently by means of forming self-assembled monolayer.
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  Molecular Arrangement of a Bolaamphiphilic Anthrancene Derivative in Langmuir-Blodgett Film

  Qing LÜ, Ming Hua LIU

  中国化学快报. 2001, 12(12): 1105-1108.

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  This paper reports the molecular assembly in the LB film of a novel bolaamphiphilic anthracene derivative (BISANS) in comparison with that of one-headed amphiphilic anthracene derivative (ANS). While ANS formed a stretched monolayer at the air/water interface, BISANS underwent aggregation to form crystal film on the water surface. Both of the H-aggregates and J-aggregates exist in the transferred LB films of bolaamphiphilic BISANS, only J-aggregates formed in the LB film of ANS.
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  Phase Structures of Microemulsions Determined by the Steady-State Fluorescence Method

  Guo Quan SHAO, Qiang SHEN, Hong Zhi MAO, Gan Zuo LI, Wei Can ZHANG

  中国化学快报. 2001, 12(12): 1109-1112.

  摘要 ( ) 可视化 收藏

  The steady-state fluorescence method has been tentatively used to determine the phase structures of microemulsion systems consisting of cetyltrimethylammonium bromide (CTAB), n-butanol (n-C₄H₉OH), octane (n-C₈H₁₈), and water. The excimer/monomer intensity ratio (I_e/I_m) of pyrene has demonstrated that the various structures in the microemulsion phase region can be distinguished. The results are consistent with electrical conductivity data already reported.
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  A Study of the Probe Effect on the Apparent Image of Biological Atomic Force Microscopy

  Xue Mei WANG, Lei QIN, Long BA, Zu Hong LU

  中国化学快报. 2001, 12(12): 1113-1114.

  摘要 ( ) 可视化 收藏

  The probe effect on the apparent image of biological atomic force microscopy was explored in this study, and the potential of AFM in conformational study of gene related biological processes was illustrated by the specific nanostructural information of a new antitumor drug binding to DNA.
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  Ethylene Oligomerization by (dppe) MCl₂ [M=Fe(II), Co(II), Ni(II)] Complexes/EAO

  Yu Liang ZHANG, Ming Xing QIAN, Ren HE

  中国化学快报. 2001, 12(12): 1115-1118.

  摘要 ( ) 可视化 收藏

  The catalytic properties of a series of (dppe) MCl₂[M=Fe(II), Co(II), Ni(II)] in combination with EAO (ethylaluminoxane) for ethylene oligomerization have been investigated. Treatment of the bidentate phosphine metal complexes with EAO in toluene generated in situ active catalysts which catalyze oligomerizaton of ethylene to low-carbon olefins. The effects of reaction temperature, ratios of n(Al):n(M) and reaction periods on catalytic activity and product distribution have been studied. The activity of cobalt complex with EAO at 200℃ was 4021 g/g(Co)·h, and the selectivity of C_4-10 olefins is 95.5%.
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  Oxidation of Carbon Monoxide over Cu/CeO₂ Catalysts Prepared by SMAI

  Wei Ping HUANG, Xiu Cheng ZHENG, Shou Min ZHANG, Xiao Hang QIU, Wei WEI, Bao Qing LI, Shi Hua WU

  中国化学快报. 2001, 12(12): 1119-1122.

  摘要 ( ) 可视化 收藏

  Supported Cu catalysts for low-temperature CO oxidation were prepared by solvated metal atom impregnation (SMAI). X-ray photoelectron spectroscopy (XPS) investigations indicated that the copper in all the samples was in a metallic state. XRD measurements showed that the mean diameters of Cu particles prepared by SMAI were small. Catalytical tests showed that the SMAI catalyst had high CO oxidation activity.
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  Ni-B/TiO₂ Amorphous Catalyst Used in Heavy Arenes of Petrochemicals Hydrogenation

  Qing Yan CHENG, Wei LI, Ying ZHOU, Ming Hui ZHANG, Nai Jia GUAN, Ke Yi TAO

  中国化学快报. 2001, 12(12): 1123-1126.

  摘要 ( ) 可视化 收藏

  A supported Ni-B/TiO₂ amorphous catalyst was prepared by impregnation and reduction. It was characterized by XRD, SAED, DSC, XPS, etc.. The catalytic activity of catalyst was measured through the hydrogenation of heavy arenes in petrochemicals for the first time.
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  Ultrathin Multilayer Films Incorporating Keggin-type Heteropolyanion Clusters

  Lin XU, En Bo WANG, Zhuang LI, Hong Yu ZHANG, Chao QIN

  中国化学快报. 2001, 12(12): 1127-1130.

  摘要 ( ) 可视化 收藏

  Two new ultrathin multiplayer films have been successfully prepared from Keggin-type heteropoly acids H₄[SiW₁₂O₄₀] and H₃[PMo₁₂0₄₀] with polyelectrolytes PEI, PSS, and PAH, using the electrostatic layer-by-layer self-assembly technique. The XR results reveal their film thickness at nanoscale (~20 nm). According to the AFM images, it is believed that the surface roughness (rough degree of film surface) of the polyelectrolyte-polyoxometalate film greatly depends on the kind of polyoxometalates.
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  Crystal Structure of Diethyl[2,3-Di(Ethoxycarbonyl)-2, 3-di(p-nitrophenyl)] Succinate

  Zheng Hua WANG, Zhao Long LI, Xiao Yin HONG

  中国化学快报. 2001, 12(12): 1131-1134.

  摘要 ( ) 可视化 收藏

  A new conformational carbon-carbon bond free radical initiator diethyl [2,3-di(ethoxycarbonyl)-2,3-di(p-nitrophenyl)] succinate (EMNPS) was synthesized and identified by elemental analysis, FAB-MS, IR and ¹H NMR spectroscopy. The analytical results of single crystal X-ray show the conforma-tion of EMNPS tends to be a stagger gauche form, and torsion angle of the two gauche phenyls is smaller than 60°. There is obvious elongation in central carbon-carbon bond length (0.161 nm). EMNPS can be decomposed into two relatively stable free radicals measured by ESR. By initiating bulk polymeriza-tion of methyl methacrylate (MMA), EMNPS shows the ability of controlling the molecular weight of polymers.
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  Continuous Production of Carbon Nanotubes by Using Moving Bed Reactor

  Bao Chun LIU, Mei Zhen QU, Zuo Long YU

  中国化学快报. 2001, 12(12): 1135-1138.

  摘要 ( ) 可视化 收藏

  High-quality carbon nanotubes were continuously produced by using moving bed reactor. The studies of scanning electron microscopy and transmission electron microscopy reveal their homogeneity both in inner (~10 nm) and outer diameter (20-40 nm) of the tubes. The studies of X-ray photoelectron spectroscopy and the oxidation of carbon nanotubes in air demonstrate that the tubes have good graphitic degree.
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  Novel Silicon Nanotubes

  Hong Bo CHEN, Jing Dong LIN, Jun YI, Yun CAI, Guang WEI, Yin Zhong LIN, Dai Wei LIAO

  中国化学快报. 2001, 12(12): 1139-1140.

  摘要 ( ) 可视化 收藏

  Novel silicon nanotubes with inner-diameter of 60-80 nm was prepared using hydrogen-added dechlorination of SiCl₄ followed by chemical vapor deposition (CVD) on a Ni_xMg_yO catalyst. The TEM observation showed that the suitable reaction temperature is 973 K for the formation of silicon nanotubes. Most of silicon nanotubes have one open end and some have two closed ends. The shape of nanoscale silicon, however, is a micro-crystal type at 873 K, a rod or needle type at 993 K and an onion-type at 1023 K, respectively.
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  Self-organization of Gold Nanoparticles Protected by 9-(5-Thiopentyl)-carbazole

  Shu WANG, Yu Liang LI, Chi Min DU, Zhi Qiang SHI, Sheng Xiong XIAO, Hong Juan FANG, Dao Ben ZHU

  中国化学快报. 2001, 12(12): 1141-1144.

  摘要 ( ) 可视化 收藏

  Through the reduction of [AuCl₄]^- by aqueous sodium borohydride in the presence of 9-(5-thiopentyl)-carbazole, the gold nanoparticles has been prepared and characterized.