中国化学快报

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α-Oxo Ketene Dithioacetals Chemistry-A Facile Route to the Synthesis of Fused Heterocyclic Compounds

Mei Xin ZHAO, Qun LIU, Yu Lan HU, De Long LI

中国化学快报. 2000, 11(04): 283-284.

摘要 ( )

可视化

The fused heterocyclic compounds 2:imidazo[1,2-a] pyridine 2a-c and pyrido[1,2-a] pyrimidine 2d were obtained from the reaction of α-cinnamoyl ketene dibenzylthio acetals 1 with diamine. When α-cinnamoyl-α'-benzoyl ketene N, N-acetals 3a-b were treated by t-BuONa/t-BuOH solution, 8-benzoyl-pyrido[1,2-a] pyrimidine 4 was produced.

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Synthesis of Cycloundecanone from Benzimidazole Methiodide Salt

Zheng LI, Zhen SHI

中国化学快报. 2000, 11(04): 285-288.

摘要 ( )

可视化

The intra-molecular addition reaction of Grignard reagent with quaternary C=N bond of benzimidazole methiodide salt is reported, and a novel method for the synthesis of cycloundecanone is provided.

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Samarium(II) Iodide Promoted Synthesis of 1-ethoxycarbonylmethyl-2-hydrofullerene

Sheng ZHANG, Liang Bing GAN, Chun Hui HUANG, Xiao Rao HE

中国化学快报. 2000, 11(04): 289-292.

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可视化

the reaction of C₆₀ with methyl bromoacetate in the presence of SmI₂ gives the title compound 1-methoxycarbonylmethyl-2-hydrofullerene in good yield.

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An Improved Synthesis of α-Phenylseleno Arsonium Ylides

Gui Sheng DENG, Zhi Zhen HUANG, Xian HUANG

中国化学快报. 2000, 11(04): 293-294.

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α-Seleno arsonium ylides 5 have been synthesized through the reaction of α-unfunctionalized arsonium ylides 4 with almost equimolar phenylselenenyl iodide 2.

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Studies on the Total Synthesis of Hainanolide (Ⅵ)-The First Access to the Lactone Functionality

Xiao Ming YU, Shi Zhi CHEN, Liang HUANG

中国化学快报. 2000, 11(04): 295-296.

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可视化

C_2a-β-H ketone 6 was synthesized from the exo-IMDA-additive 4 with the aid of singlet oxygen, and ring E of hainanolide was assembled via kinetic enol ether of 6.

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Synthesis of Muramyl dipeptide Analogs by Incorporation of 3,3,3-Trifluoroalanine

Zheng Fu WANG, Jie Cheng XU

中国化学快报. 2000, 11(04): 297-300.

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可视化

Carbobenzoxy-L-3,3,3-trifluoroalanine was synthesized and it was incorporated into MDP for replacement of L-alanine.

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Studies on Agarofurans Ⅲ. The Synthesis of 3-Substituted Agarofurans

Wu Yan ZHANG, Ji Yu GUO, Xiao Tian LIANG

中国化学快报. 2000, 11(04): 301-304.

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可视化

14-Nor-3-oxodihydroagarofuran (2) was prepared in high yield. From 2, derivatives 12 and 13 were synthesized by Grignard addition. In order to identify the configuration of C-3 in compound 12 and 13, the sterospecific synthesis of compound 12 has been carried out in 5 steps from octalone (14).

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The Copolymers of N-alkyl Carbazole and Stilbene Prepared by Oxidative-coupling reaction

Cai Mao ZHAN, Zhan Gang CHENG, Hua XIAO, Xi YANG, Jin Gui QIN

中国化学快报. 2000, 11(04): 305-306.

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可视化

A kind of novel electroluminescence polymer has been prepared by oxidative-coupling polymerization of N-alkyl carbazole and trans-stilbene. The structure of the copolymers was characterized by elemental analysis, UV-vis and FTIR spectra. The copolymers have good solubility in chloroform and acetone. Fluorescence spectra showed that these polymers are blue-light emitting materials.

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Synthesis of Novel Poly (aryl ether amide)s Containing the Phthalazinone Moiety

Lin CHENG, Xi Gao JIAN

中国化学快报. 2000, 11(04): 307-310.

摘要 ( )

可视化

Two novel heterocyclic diamine monomers:1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-amin-ophenoxy)phenyl](2H)phthalazin-1-one and 1,2-dihydro-2-(4-aminophenyl)-4-[4-(4-aminophenoxy)-3,5-dimethylphenyl](2H)phthalazin-1-one were successfully synthesized from readily available heterocyclic bisphenol-like monomers in two steps in high yield. A series of novel poly (aryl ether amide)s containing the phthalazinone moiety were successfully prepared by the direct polymerization of the novel diamines and aromatic dicarboxylic acids using triphenyl phosphite and pyridine as condensing agents.

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Catalytic hydrolysis of CFC-12 over solid acid Ti(SO₄)₂

Zhen MA, Wei Ming HUA, Yi TANG, Zi GAO

中国化学快报. 2000, 11(04): 311-314.

摘要 ( )

可视化

The catalytic hydrolysis of dichlorodifluoromethane (CFC-12) was investigated over solid acid Ti(SO₄)₂. The catalytic activity decreased with the calcination temperature. When space velocity was 6 l h^-1 g-cat^-1, the CFC-12 conversion at 310℃ over Ti(SO₄)₂ calcined at 350℃ remained about 98.5% during 360 h on stream, and the selectivity to by-products remained zero. The findings enlarged the scope of traditional catalyst systems for the CFCs decomposition.

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Coumarin-glycoside and Ferulate from Peucedanum decursivum

Ling Yi KONG, Nian Huan YAO

中国化学快报. 2000, 11(04): 315-318.

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Two new compounds named decuroside VI (1) and decursidate (2) were isolated from the roots of Peucedanum decursivum-a traditional Chinese medicine. Their structures were elucidated on the basis of chemical evidence and spectral analysis.

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Two New Iridoid Glycosides from Caryopteris mongholica

Yong Hong ZHANG, Dong Liang CHENG

中国化学快报. 2000, 11(04): 319-322.

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Two new iridoid glucosides were isolated from the whole plant of Caryopteris mongholica Bunge. On the basis of chemical and spectral evidence, they were determined as 8-acetyl-6'-O-(p-coumaroyl) harpagide and 6'-O-(p-coumaroyl) antirrinoside, respectively.

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A New Phenylpropanoid Glycoside:Serratumoside A from Clerodendrum serratum

Hui YANG, Ai Jun HOU, Shuang Xi MEI, Li Yan PENG, Han Dong SUN

中国化学快报. 2000, 11(04): 323-326.

摘要 ( )

可视化

A new phenylpropanoid glycoside, serratumoside A, was isolated from the aerial parts of Clerodendrum serratum var. amplexifolium Moldenke. Its structure was determined by spectral and chemical methods.

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Ent-untenospongin A, a New C₂₁ Furanoterpene from the Indian Marine Sponge Hippospongia sp.

Yue Wei GUO, Enrico TRIVELLONE

中国化学快报. 2000, 11(04): 327-330.

摘要 ( )

可视化

A new C₂₁ furanoterpene, ent-untenospongin A (2), together with a known related compound, tetradehydrofurospongin-1 (1), has been isolated from the Indian marine sponge Hippospongia sp. and its structure was determined on the basis of spectroscopic data.

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Two New Sesquiterpenes from Euonymus phellomana Loes.

Hong WANG, Xuan TIAN, Li YANG, Yao Zu CHEN

中国化学快报. 2000, 11(04): 331-332.

摘要 ( )

可视化

Two new β-dihydroagarofuran sesquiterpenes were isolated from Euonymus phellomana Loes.and their structures were established on the basis of spectral analysis.

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A New Triterpenoid Saponin:Se-saponin A

Hui YANG, Qin MU, Yi Neng HE, Han Dong SUN

中国化学快报. 2000, 11(04): 333-336.

摘要 ( )

可视化

A new triterpenoid saponin, se-saponin A, was isolated from the aerial parts of Clerodendrum serratum var. amplexifolium Moldenke. Its structure was determined by spectral and chemical methods. Only one triterpenoid saponin has been isolated from Clerodendrum genus before. Se-saponin A is the second instance.

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Two Triterpenoid Saponins from Lonicera Japonica

Rong Wei TENG, De Zu WANG, Chang Xiang CHEN

中国化学快报. 2000, 11(04): 337-340.

摘要 ( )

可视化

A new triterpenoid saponin, together with a known saponin, was isolated from the flowers of Lonicera Japonica Thunb. Using chemical and spectroscopic methods, mainly 2D NMR technique, their structures were deduced to be 3-β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyl-(1→3)-α-L-rhamnospyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside and 3-α-L-rhamnospyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnospyranosyl-(1→2)-[β-D-xylcopyranosyl-(1→6)]-β-D-glucopyranoside, respectively.

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Calamistrin E, the First Annonaceous Acetogenin with Double Bond in Aliphatic Chain from Genus Uvaria

Guang Xiong ZHOU, Ruo Yun CHEN, Yan Jun ZHANG, De Quan YU

中国化学快报. 2000, 11(04): 341-342.

摘要 ( )

可视化

Calamistrin E, the first Annonaceous acetogenin with C=C bond in the aliphatic chain from the genus Uvaria was isolated from U. calamistrata. Its structure including relative and absolute configurations was determined by chemical derivation and spectral analysis.

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Two New Oleanene-Type Triterpenoid Saponins from Pueraria peduncularis

Na LI, Zhi Da MIN, Hou Ming WU

中国化学快报. 2000, 11(04): 343-346.

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可视化

From the radix of Pueraria peduncularis Grah., two new oleanene-type triterpenoid saponins named pedunsaponins B (2) and C (3) were isolated. Their structures were determined as 3-O-(6-O-methyl)-β-D-glucuronopyranosyl-3β,15α-diol-12-oleanene-16-one (2) and 3-O-β-D-glucopyranosyl-(1→3)-β-D-glucuronopyranosyl-3β,15α-diol-12-oleanene-16-one (3) on the basis of spectroscopic evidence and chemical reactions.

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Molecular Dynamic Study for Chiral Discrimination of α-Phenylethylamine by Modified Cyclodextrin in Gas Chromatography

Meng Yan NIE, Liang Mo ZHOU, Qing Hai WANG, Dao Qian ZHU

中国化学快报. 2000, 11(04): 347-350.

摘要 ( )

可视化

A molecular dynamic method in conjunction with a statistic test has been utilized to model chiral recognition of α-phenylethylamine on heptakis (2,6-di-O-butyl-3-O-butyryl)-β-cyclodextrin in gas chromatography. The modelling data correlated with the chromatographic elution order, and indicated that the preferred site of α-phenylethylamine is the interior of cavity.

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Electrochemical Studies of Paclitaxel Interaction with Tubulin

Yong YU, Qi Long LI

中国化学快报. 2000, 11(04): 351-352.

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A highly sensitive linear sweep voltammetric method was developed for the determination of paclitaxel and the mechanism of the binding of paclitaxel to tubulin was studied. Tubulin dimer formed with paclitaxel an electrochemically nonactive complex with a combination ratio of 2:2. Its stability constant was 2.85×10²². So the tubulin dimer had two binding sites for paclitaxel. The experiment showed that the binding sites of paclitaxel to tubulin dimer were different from that of Ca²⁺ to tubulin dimer.

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Liquid Chromatographic Resolution of Racemic 2-Phenyl-1,1-cyclo-propanedicarbonitrile and its Analogues on Chiral Stationary Phase

You Cheng LIU, Xin Zhu LI, Jing LI

中国化学快报. 2000, 11(04): 353-356.

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可视化

Excellent resolution of racemic 2-phenyl-1,1-cyclopropanedicarbonitrile and its nine analogues was accomplished using 100-5CHI-TBB chiral stationary phase under normal-phase HPLC conditions. The influence of mobile phase and the optimum conditions for the resolution of optically active enantiomers were investigated.

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Removal of Endotoxin from Human Serum Albumin Solutions by Hydrophobic and Cationic Charged Membrane

Gui Lin WEI, Zhen Hua SHAN, Ming Chen PAN, Zhi Hong GAO

中国化学快报. 2000, 11(04): 357-360.

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可视化

A novel matrix of macropore cellulose membrane was prepared by chemical graft, and immobilized the cationic charged groups as affinity ligands. The prepared membrane can be used for the removal of endotoxin from human serum albumin (HSA) solutions. With a cartridge of 20 sheets affinity membrane of 47 mm diameter, the endotoxin level in HSA solution can be reduced to 0.027 eu/mL. Recovery of HSA was over 95%.

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The Crystallization of Poly (3-dodecylthiophene) in an Oriented Solidification Environment

Xiu Ying QIAO, Xian Hong WAN, Zhao Bin QIU, Zhi Shen MO, Wen Kui WANG

中国化学快报. 2000, 11(04): 361-364.

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The crystallization behaviors of poly (3-dodecylthiophene) (P3DDT) under two different oriented solidification conditions, i.e., two different relative relations (90° and 180°) between the directions of gravity and solidification, were investigated. X-ray diffraction results reveal that although similar layered structures are formed, under the condition of the relative relation 180°, temperature gradient has greater effects on the perfect degree of the layered structures of P3DDT. It also can be concluded that after recrystallization, the layered structures of P3DDT can be improved at relative relation 90°, but the orderly degree of the arrangements of alkyl side chains are not improved yet, even is reduced for both of the oriented solidification conditions.

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Crystal Transformation of Nylon 11 Using in situ WAXD

Qing Xin ZHANG, Yu Xian AN, Ying Ning YU, Zhi Shen MO, G. R. MITCHELL

中国化学快报. 2000, 11(04): 365-366.

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可视化

α Form Nylon 11 films were found to exist a non-linear transformation at 70℃ during the heating process using in situ WAXD. The α Form disappeared but δ form appeared when the temperature was higher 70℃.

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Multiple Melting Endotherms of Syndiotactic Polystyrene in β Crystalline Form

Zhen Hua YUAN, De Yan SHEN

中国化学快报. 2000, 11(04): 367-368.

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可视化

A series of syndiotactic polystyrene (SPS) samples in β crystalline form were prepared by cooling from the melt at various cooling rates. The effects of cooling rate from the melt, and DSC heating rate on the multiple melting behaviors of β crystals were investigated by differential scanning calorimetry (DSC) and modulated differential scanning calorimetry (MDSC), from which the nature.of the multiple melting behavior was ascribed to the occurring of a recrystallization process.

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Infinite Three-Dimensional Coordination Polymers:Synthesis and Structures of[Cd (4,4'-bpy)₂ (H₂O)₂]_n (pic)_2n,[Zn (4,4'-bpy)₂ (H₂O)₂]_n-(pic)_2n (H₂O)_2n, and[Zn(4,4'-bpy)₂ (H₂O)₂]_n (4,4'-bpy)n (H₂O)n (pic)_2n

Fu Pei LIANG, Zi Lu CHEN, Rui Xiang HU, Hong LIANG, Zhao Hui ZHOU

中国化学快报. 2000, 11(04): 369-372.

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可视化

Three Complexes of the formula[Cd (4,4'-bpy)₂ (H₂O)₂]_n (pic)_2n (1),[Zn (4,4'-bpy)₂ (H₂O)₂]_n-(pic)_2n (H₂O)_2n (2) and [Zn (4,4'-bpy)₂ (H₂O)₂]_n (4,4'-bpy)_n (pic)_2n (H₂O)_n (3) (4,4'-bpy=4,4'-bipyridine; pic=picric anion) have been synthesized and characterized by elemental analysis and single-crystal x-ray diffraction. They all have infinite three-dimensional network structure, crystallizing in the monoclinic space group C2/c (1) and Cc (2,3).

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Novel Ru-K/Carbon Nanotubes Catalyst for Ammonia Synthesis

Yun CAI, Jing Dong LIN, Hong Bo CHEN, Hong Bin ZHANG, Guo Dong LIN, Dai Wei LIAO

中国化学快报. 2000, 11(04): 373-374.

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可视化

A novel ammonia synthesis catalyst, potassium-promoted ruthenium supported on carbon nanotubes, was developed. It was found that the Ru-K/carbon nanotubes catalyst had higher activity for ammonia synthesis (20.85 ml NH₃/h/g-cat) than the Ru-K/fullerenes (13.3 ml NH₃/h/g-cat) at atmospheric pressure and 623 K. The catalyst had activity even at 473 K. and had the highest activity (23.46 ml NH₃/h/g-cat) at 643 K. It was suggested that the multi-walled structure favored the electron transfer the hydrogen-storage and the hydrogen-spill which were favorable to ammonia synthesis.

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Second-order Nonlinearities of CdS Nanoparticles Studied by Hyper-Rayleigh Scattering Technique

Yu ZHANG, Xin WANG, De Gang FU, Ju Zheng LIU, Zu Hong LU

中国化学快报. 2000, 11(04): 375-376.

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可视化

A series of CdS nanoparticles with different surfaces were prepared by colloidal chemical method and reverse micelle method. Their second-order nonlinear optical (NLO) properties were experimentally studied in solution by newly developed hyper-Rayleigh scattering (HRS) technique. The results show that "per particle" first-order hyperpolarizability β values are sensitive to the synthetic method and the surface chemical modification.

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2000年, 第11卷, 第04期　刊出日期：2000-04-20

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2000年, 第11卷, 第04期 刊出日期：2000-04-20

2000年, 第11卷, 第04期　刊出日期：2000-04-20