中国化学快报

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A Novel Photoproduct of 2-Methoxycytosine in Phosphate Solution Under Far UV Irradiation

Feng LIN, Jin Long WU, Xiao Wei FAN

中国化学快报. 1999, 10(08): 623-624.

摘要 ( )

可视化

Under the irradiation of medium pressure mercury lamp(MPML)the photolysis of 2-methoxycyosine (MAP) in phosphate solution leads to the production of a novel compound C₅H₈N₃O₅P. The composition and structure of the compound has been identified by elemental analysis. EI-MS. UV. IR.¹H.³¹P-NMR.

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A New Rearrangement Reaction of 2-Phenyl Substituted Benzothiazepine with Ethoxycarbonyl Carbene─Mechanism of the Reaction and Structure of the Product

Hong Zhong WANG, Dan YAO, Ruo Xi LAN, Jia Xi XU, Sheng JIN

中国化学快报. 1999, 10(08): 625-628.

摘要 ( )

可视化

2,3-Dihydro-2-phenyl-4-(4-methoxyphenyl)-1,5-benzothiazepine reacts with ethoxy-carbonyl carbene to give an unexpected compound 2,3-disubstituted-4H-1,4-benzothiazine Ⅲ. It was found to be a new rearrangement reaction and the structure of the product was confirmed by IR, NMR, MS.

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High Diastereoselectivity in the Conjugate Addition of Functionalized Alcohols to a Chiral(E)-Nitroalkene

Qian CHENG, Takayuki ORITANI, Alfred HASSNER

中国化学快报. 1999, 10(08): 629-632.

摘要 ( )

可视化

Modest to high diastereoselectivites have been observed in the conjugate addition of functionalized alcohols to chiral (E)-nitroalkene 1 depending on the presence of metal catalysts at low temperature. The results indicated that the anti-form had been preferred in all cases.

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Reduction of o-and p-Bromomethylbenzylidenemalononitrile by1-Benzyl-1,4-dihydronicotinamide

Hong Yi WANG, You Cheng LIU, Jin Zhi CHEN, Qing Xiang GUO

中国化学快报. 1999, 10(08): 633-636.

摘要 ( )

可视化

o-Bromomethylbenzylidenemalononitrile 4 is reduced by 1-benzyl-1,4-dihydronicotinamide (BNAH, 1) to give 2,2-indanedicarbonitrile 6 and p-bromomethylbenzylidene malononitrile 5 is reduced by BNAH to give 7 and 8 by hydride transfer mechanism.

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Ring Enlargement of Alkaloids

Yu Xin LIU, Shu Feng CHEN, Xiao Tian LIANG

中国化学快报. 1999, 10(08): 637-640.

摘要 ( )

可视化

The procedure for the ring enlargement of N-heterocycles with the net result of CH₂ insertion was successfully carried out with certain alkaloids such as tetrahydroberberine and strychnine.

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Synthesis of α-Selenoesters and α-Thiolesters via Sm/SbCl₃ System in Aqueous Media

Gen Liang LU, Yong Min ZHANG

中国化学快报. 1999, 10(08): 641-642.

摘要 ( )

可视化

α-Selenoesters and α-thiolesters are synthesized via reactions of α-bromoesters with diselenides and disulfides promoted by Sm/SbCl₃ system in aqueous media in moderate to good yields.

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A Convenient Synthesis of Pyrazolylpyrazoles Using α-Oxo Ketene S,S-and N,S-Acetals

Han Song CHEN, Zheng Ming LI, Zhong Wen WANG

中国化学快报. 1999, 10(08): 643-646.

摘要 ( )

可视化

Substituted pyrazolylpyrazoles were synthesized through the reaction of hydrazine hydrate and α-oxo-(3,5-dimethyl-lH-pyrazole-1一yl) ketene S,S-and N.S-acetals, which were obtained from α-oxo-(3,5-dimethyl-lH-pyrazole-l-yl) acetophenone. Pyrazolylpyrazole was also prepared via α-oxo ketene N,O-acetal by way of ring chain transformation.

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A New Synthetic Route to 5-Isoxazolamines

Gang LIU, Zhi Qin WANG

中国化学快报. 1999, 10(08): 647-650.

摘要 ( )

可视化

5-Isoxazolamines were synthesized from α-cyano-p-vitro compounds by treatment with titanium trichloride.

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Synthesis of 2S-Hydroxymethyl-3R, 4R-dihydroxypyrrolidine

Zhen CHEN, Ren Yun WANG, Li Lian ZHU, Xiao Tian LIANG

中国化学快报. 1999, 10(08): 651-652.

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可视化

The sythesis of 2S-hydroxymethyl-3R. 4R-dihydroxypyrrolidine from D-arabinose was described in this paper.

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Total Synthesis of (±)-Cordatolide A and its Anti-HIV Activity

Qi GAO, Lin WANG, Xiao Tian LIANG

中国化学快报. 1999, 10(08): 653-656.

摘要 ( )

可视化

The natural product(±)-cordatolide A has been synthesized by a four-step approach starting from phloroglucinol. including Pechmann reaction, Friedel-Crafts acylation, cyclization, chromenylation and Luche reduction.

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Study on the Total Synthesis of Hainanolide(Ⅴ)-Oxidation of the Tricyclic Alkenes with Singlet Oxygen

Xiao Ming YU, Lu Yan ZHANG, Shi Zhi CHEN, Liang HUANG

中国化学快报. 1999, 10(08): 657-658.

摘要 ( )

可视化

Six tricyclic compounds containing C₃, C₄ double bonds were oxidized with singlet oxygen. Different regio-selectivity was found with regard to steric hinderence.

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Synthesis of New Near-infrared Fluorescent Dyes

Jiang LONG, Yong Mei WANG, Ji Ben MENG

中国化学快报. 1999, 10(08): 659-660.

摘要 ( )

可视化

A new near-infrared fluorescent dye, 9-N-(2-hydroxyethyl)-N-methylamino-6-carbethoxy-5H-benzo[a]phenoxazin-5-one 1, was prepared from the reaction of N-(2-hydroxy-ethyl)-N-methyl-4-nitrosoaniline hydrochloride and ethyl 1,3-dihydroxynaphthoate. Five more fluorescent compounds were synthesized by the reaction of the resulting dye 1 with appropriate amino acid or carboxylic acids.

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Synthesis of O-Glycosides of Heteroatom Aroyl-Suhstituted Heterocyclic Ketene Aminals

Qiang YANG, Zhan Jiang LI, Zhi Tang HUANG

中国化学快报. 1999, 10(08): 661-664.

摘要 ( )

可视化

Heteroatom amyl-substituted heterocyclic ketene aminals 1 reacted with 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl bromide 2 under the catalysis of Hg(CN)₂ or CaH₂ to give E-or Z-O-glycosides of heterocyclic ketene aminals 3 or 4 in moderate yields.

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Synthesis of Arsamacrocyclic Polyethers

Xin You CHEN, Guo Feng YU, Wen Tian TAO

中国化学快报. 1999, 10(08): 665-666.

摘要 ( )

可视化

The synthesis of eight new arsamacrocyclic Polyethers was described. The structures of these compounds were characterized by elemental analysis, IR, ¹H-NMR and MS.

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Structural Design and Property Characterization of Bi-functional Photorefractive Polymer

Yi Wang CHEN, Yuan Kang HE, Hui Ying CHEN, Feng WANG, Qi Huang GONG

中国化学快报. 1999, 10(08): 667-670.

摘要 ( )

可视化

A novel bi-functional photorefractive acrylate polymer with pendant carbazolyl groups and azo derivatives as side chains was synthesized. Photorefractive experiments showed a high twobeam coupling gain coefficient of 93 cm^-1, diffraction efficiency of 12% and electro-optic coefficient of 26 pm/V were obtained.

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A New Azafluorenone Alkaloid from Alphonsea Monogyma

Ning XIE, Nian Yun YANG

中国化学快报. 1999, 10(08): 671-672.

摘要 ( )

可视化

A new azafluorenone (onychine) alkaloid, 6,7-dimethoxy-5-hydroxy-onychine. was isolated from the stem and branch of Alphonsea monogyma. Its structure was established mainly on the basis of spectral analysis.

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A new Kaurane Derivative from Aralia Fargesii

Yu Mei ZHANG, Jun Shan YANG, Xu Dong XU

中国化学快报. 1999, 10(08): 673-674.

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可视化

A new ent-kaurane diterpene was isolated from the rhizome of Aralia fargesii. On the basis of chemical and spectral evidences, its structure was established as 16a-hydroxy-l7-isovaleroyloxy-ent-kauran-l9-oic acid.

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A New Oxoaporphine Alkaloid from Alphonsea Mollis Dun

Ning XIE, Zhi Hua CHENG, Xiao Gan YU

中国化学快报. 1999, 10(08): 675-676.

摘要 ( )

可视化

A new oxoaporphine alkaloid, 1,2-methylene-dioxy-8-hydroxy-5-methoxy oxoaporphine, was isolated from the stem barks of Alphonsea mollis. Its structure was established on the basis of spectral analysis and chemical corcelation

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Studies on the Coordination of Pr(Ⅲ) with Adrenaline by Potentiometry and Absorption Spectroscopy

Feng GAO, Jing Fen HAN, Zhi Jian WU, Yue WANG, Kui Yue YANG, Chun Ji NIU, Jia Zuan NI

中国化学快报. 1999, 10(08): 677-678.

摘要 ( )

可视化

The stability constant for complex of Pr(Ⅲ) with adrenaline has been determined by potentiometric titration under biological conditions (37℃ and O.15mo1/L NaCI). The absorption spectra of the Pr(III)-adrenaline system exhibit characteristic bands of Pr(Ⅲ) at lower pH values. However, the charge transfer band which is due to the coordination of Pr(Ⅲ) with adrenaline has been observed at higher pH values.

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Synthesis of Pyrazolines Used as Blue Organic Electroluminescence Materials

Zhi Yun LU, Wei Guo ZHU, Qing JIANG, Ming Gui XIE

中国化学快报. 1999, 10(08): 679-682.

摘要 ( )

可视化

Three kinds of pyrazolines were designed and synthesized. Their structures were elucidated by IR, ¹HNMR MS, UV and elemental analysis. Their luminescent properties were determined, which indicated that they had strong blue fluorescent properties. One of them was designed to have good film formation. All the three kinds of pyrazolines can be used as blue organic electroluminescence materials (OELMs)

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Synthesis and Fluorescence Property of A New Subphthalocyanine

Xiao Bing WANG, Dai Hua TANG, Zhen ZHEN, Jian Cheng ZHANG, Xin Hou LIU

中国化学快报. 1999, 10(08): 683-684.

摘要 ( )

可视化

A new soluble subphthalocyanine was first prepared and its fluorescence property was investigated. It exhibited both S₁ and S₂ emissions, of which the quantum yields and the lifetimes were measured.

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Bis-radicals (nitronyl nitroxide and imino nitroxide) Substituted Benzene with Long Alkyl Chain: Synthesis, Magnetic Study and Formation of LB film

De Qing ZHANG, Liang DING, Yu XU, Dao Ben ZHU

中国化学快报. 1999, 10(08): 685-688.

摘要 ( )

可视化

The titled compound 1 as well as compounds 2 and with similar chemical structures were prepared and characterized. The magnetic properties of 1 were investigated with SQUID (MPMS, quantum design) magnetometer. Studies with Langmuir-Blodgett (LB) technique indicated that stable condensed film of 1 could be formed at air-water interface and could be transferred onto various solid substrate under suitable conditions.

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Study on the Tautomerism of an Indoline Spiropyran in Compressed CO₂ and Ethanol Mixture

Xi Feng ZHANG, Qiang SUI, Bu Xing HAN, Hai Ke YAN, Yan Qiao WANG

中国化学快报. 1999, 10(08): 689-690.

摘要 ( )

可视化

Thermodynamic and kinetic properties of the tautomerism of an indoline spiropyran in compressed CO₂-ethanol mixture were studied by UV-Vis spectroscopy at 298.15 K, 303.15 K, and 308.15 K. It was found that the composition of the mixture affects the equilibrium constant and the rate constant significantly.

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The Effect of Rare Earth on the Activity of Methanol Synthesis Catalyst

Hong Tao MA, Guo Cai DENG, Xian Zhi GUO, Run Ti CHEN

中国化学快报. 1999, 10(08): 691-692.

摘要 ( )

可视化

In this paper several rare earth oxides were added into methanol synthesis catalyst by solid-mixing method to improve the activity of methanol synthesis catalyst. Nd₂O₃, CeO₂, La₂O₃ and Sm₂O₃ decrease the catalyst activity, while Pr₂O₃, Gd₂O₃ and Eu₂O₃ increase the methanol yield.

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Novel Photochromic Compounds Responding to InGaN Diode Laser;Synthesis and Photochromic Behavior of Dibenzothiophenylcycloalkenes

Ping FAN, Zhen Nian HUANG, Jiang Bin XIA, Yang Fu MING, Mei Gong FAN

中国化学快报. 1999, 10(08): 693-696.

摘要 ( )

可视化

1,2-bis(3-Methylbenzo[b]thiophen-2-yl)cycloalkene derivatives 3a, 3b and 1-(2-methylbenzo[b]thiophen-3-yl)-2-(3-methylbenzo[b]thiophen-2-yl)cyclohexene 9 were synthesized. The obtained compounds exhibited photochromic property and the absorption bands of the colored forms 4a. 4b and 10 centered between 360-440 nm thus possessing the sensitivity at the wavelength of the newly developed InGaN diode laser.

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Synthcsis, Structure and Magnetochemistry of a New Hexanuclear Manganese Oxide Complex of the Formula [Mn₆O₂ (O₂CPh)₁₀(CH₃CN)₄]

Jin AN, Zhi Da CHEN, Jiang BIAN, Shi Xi WANG, Guang Xian XU

中国化学快报. 1999, 10(08): 697-700.

摘要 ( )

可视化

The reported X-ray structure and magnetochemical properties of [Mn₆O₂ (OCPh)₁₀ (CH₃CN)₄], effectively derived from [NBu₄][Mn₄0₂ (O₂CPh)₉ (H₂O)] with equivalent of tren in CH₃CN is shown.

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Catalytic Hydrogenation of Diacetyl Monoxime to Tetramethylpyrazine with the Soluble Transition Metal Catalysts

Xiang Yu WANG, Xiao Ming ZHENG, Zhao Yin HOU

中国化学快报. 1999, 10(08): 701-704.

摘要 ( )

可视化

Catalytic hydrogenation of diacetyl monoxime to tetramethylpyrazine, by the homogeneous catalysts generated in situ from some transition metal chlorides with triphenylphosphine in ethanol under H₂ pressure of 0.6~4.6 MPa at 100~150℃, has been studied. The optimum H₂ partial pressure was observed at about 1.3 MPa. The maximum conversion of diacetyl monoxime and yield of tetramethylpyrazine were 97% and 90%, respectively.

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Synthesis, Structure of Organophosphonyl Polyoxotungstates of Formula [C₆H₁₁P(O)]₂ Xⁿ⁺W₁₁O₃₉^(8-n)-(Xⁿ⁺=P⁵⁺, Si⁴⁺, B³⁺, Ga³⁺)

Zhen Gang SUN, Jing Fu LIU, Xiao Hong WANG, Shu Mei YUE, Jian Xin LI

中国化学快报. 1999, 10(08): 705-706.

摘要 ( )

可视化

Cyclohexanephosphonyl heterupulyundecatungstates of formula [C₆H₁₁P(O)]₂ Xⁿ⁺W₁₁O₃₉^(8-n)-(Xⁿ⁺=P⁵⁺, Si⁴⁺, B³⁺, Ga³⁺)have been prepared. puritied and characterized by elemental analysis. 1R and ¹H. ³¹P and ¹⁸³W NMR.

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Synthesis and Structures of New Borophosphates (B_1-XM_X)PO₄ (M=Mn,Fe,Co,Ni,Cu) with Orthorhombic Low-Cristobalite Type

Jin Xiao MI, Shao Yu MAO, Zai Hong CHEN, Zhong Le HUANG, Jing Tai ZHAO

中国化学快报. 1999, 10(08): 707-708.

摘要 ( )

可视化

The first reported (B_1-xM_x)PO₄ (M=Mn. Fe. Co. Ni. Cu) compounds were synthesized by high temperature solid state methods and the structures refined from X-ray powder data. The transition metal substitutions on the boron site stabilized the structure to the orthorhombic low-cristobalite type with average volumes per tetrahedral unit 300% larger than that in BPO₄ and novel catalytic properties are expected. The magnetic data indicate the 3+ valences for the metals.

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Preparation of the Phosphors BaAl₂O₄:Eu, RE (RE=Dy, Ho) by Microwave Heating Technique and Observation of Long Phosphorescence

Ying Liang LIU, Xiao Ming TANG, Xi De CHEN, Bing Fu LEI, De Xiong FENG

中国化学快报. 1999, 10(08): 709-712.

摘要 ( )

可视化

The phosphors BaAl₂O₄Eu²⁺. RE (RE=Dy,Ho) have been prepared by the microwave heating technique. The long-lasting phosphorescence in the phosphors of the barium aluminate activated with europium and other rare earths has been observed for the first limy

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The Effect of Al³⁺, Na⁺, NH₄⁺ on Ti Content in the Preparation of Ti-ZSM-5

Cheng Hua XU, Shao Jie LU, Gui Ying DENG, Fa Li QIU

中国化学快报. 1999, 10(08): 713-716.

摘要 ( )

可视化

Thc effeet of Al²⁺. NH₄, Na⁺ on the Ti content in the pmparation of Ti-ZSM-5 by the isomorphous substitution of ZSM-5 using gaseous TiCl₄ as titanium resource has heen im estigatcd It is surprisingly found that although the direef ratio exists heween the Ti conmnt and the content of the skeletal Al:y=(0.08x²+0.57x+1.23 (hereyrepresents TiO₂% and xreprcwnts Al²O₃%). but the catalytic activities of Ti-ZSM-5 for the oxidation of styrene sharply rise with the decrease of TiO₂%. The skeletal Al hinders the Ti incorporation into the framework of molmular sim, characterised by FT-IR chniyuc. At the same time. NH₄⁺ ion has no etlcct on the Ti incorporation. but Na ion does.

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本期目录

1999年, 第10卷, 第08期　刊出日期：1999-08-20

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本期目录

1999年, 第10卷, 第08期 刊出日期：1999-08-20

1999年, 第10卷, 第08期　刊出日期：1999-08-20