中国化学快报

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Reaction of Phenylethyne with 2,4-Pentanedione in the Presence of Manganese(Ⅲ) Acetate and Oxygen

Chang YI QIAN, Bo HAN, Yu Fen ZHAO, Yoshikazu NOIRI, Hiroshi NISHINO, Kazu KUROSAWA

中国化学快报. 1997, 8(03): 189-190.

摘要 ( )

可视化

The reaction of phenylethyne with 2,4-pentanedione in the presence of manganese(Ⅲ) acetate and oxygen at room temprature gave 4-acetyl-5-benzoyl-3-methyl-1,2-dioxolan-3-ol, 2-acetyl-3-benzoloxirane and 3-acetyl-2-methyl-phenylfuran.

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Novel Reduction of Sodium Alkyl Thiosulfates to Disulfides with TiCl₄/Sm System

Hong Yun GUO, You HUANG, Yong Min ZHANG

中国化学快报. 1997, 8(03): 191-192.

摘要 ( )

可视化

Sodium alkyl thiosulfates(Bunte salts) can be readily reduced to the corresponding disulfides with TiCl₄/Sm system in good to excellent yields under mild conditions.

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Nucleophilic Aromatic Substitution of Nitrobenzenes with Nitrite Ion

Zhi Qiang ZHANG, Zheng Hua TIAN

中国化学快报. 1997, 8(03): 193-194.

摘要 ( )

可视化

It is experimentally found that different reaction courses exist when nitrite ion reacts with nitrobenzenes with different electron withdrawing groups.When it is substituted with strong electron withdrawing groups.self-condensation in aprotic polar solvent occurs to give symmetrical disubstituted diphenyl ethers.However.when it is substituted with moderate electron withdrawing groups,no diphenyl ethers are obtained under the same conditions,instead,corresponding carboxylates are yielded.As a result,the applicability of this reaction is distinctly clarified.

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Syntheses of (3-Benzyl-4-Aroyl-1,2,4-Triazole-5-yl)[5-(3,4,5-Trimethoxylphenyl)-1,3,4-Oxadizole-2-yl] Sulfides

Xiao Ming FENG, Rong CHEN, Lian Fu TANG, Yao Zhong JIANG

中国化学快报. 1997, 8(03): 195-198.

摘要 ( )

可视化

Twelve new (3-benzyl-4-aroyl-1,2,4-triazole-5-yl)[5-(3,4,5-trimethoxyphenyl)-1,3,4-oxadiazole-2-yl] sulfides(2) have been synthesized from the nucieophilic displacements of 3-benzyl-4-aroyl-1,2,4-triazole-5-hydrosulfuryl anion on the 2-position of 2-methylsulfonyl-5-(3,4,5-trimethoxyphenyl)-1,3,4-oxadiazole(1).Compounds(2) were screened for their antibacterial activity against E.Coli at 0.01%.The results show that some compounds(2) have strong inhibiting effects.

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Synthesis and Diastereomeric Analysis of Uridine 2',3'-Cyclic Phosphite

Yun DING, Yi Bing ZHANG, Yao Quan CHEN

中国化学快报. 1997, 8(03): 199-202.

摘要 ( )

可视化

Uridine 2',3'-cyclic phosphite has been synthesized and the diastereomers were analysed by 2D NMR technique to assign the configuration.

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Studies on the Total Synthesis of Hainanolide (Ⅲ)-Unusual Diene Isomerization in a Diels-Alder Reaction

Wen Qian YANG, Lu Yan ZHANG, Shi Zhi CHEN, Liang HUANG

中国化学快报. 1997, 8(03): 203-204.

摘要 ( )

可视化

An unexpected diene isomerization of the triene acid 3 in the Lewis acid catalyzed intramolecular Diels-Alder reaction was observed.

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Total Synthesis of Przewaquinone A

Wen Hu DUAN, Jun Chao CAI

中国化学快报. 1997, 8(03): 205-206.

摘要 ( )

可视化

Przewaquinone A, a natural orthoquinone was synthesized through several steps,the analytic data of the synthetic target compound was identical with that of przewaquinone A.

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Synthesis of New Spin Labeled Derivatives of Podophyllotoxin as Potential Anticancer Agents

Jian Lin PAN, Yan Guang WANG, Jian Feng SHI, Yao Zu CHEN

中国化学快报. 1997, 8(03): 207-208.

摘要 ( )

可视化

Five new nitroxyl spin labeled podophyllotoxins (2-6) have been synthesized. Compounds 2 and 3 have been tested for their anticancer activity in vitro.The results showed that compound 3 is much more potent than the clinically used etoposide (VP-16) in its inhibition of P388 cells,while compound 2 is not active.

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Synthesis of Bis(macrocyclic) Polyamines Containing Rigid Bridging Groups

Hong Jun WANG, Cheng Tai WU

中国化学快报. 1997, 8(03): 209-212.

摘要 ( )

可视化

This paper deals with the synthesis of three new symmetrical bis (macrocylic) polyamines and their dinuclear copper (Ⅱ) complexes.All these compounds were identified by elemental analysis and spectral analysis (IR,¹H and ¹³C NMR).

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Calixthiacrown:A New Multidentate Ligand for Platinum Metal

Yuan Yin CHEN, Zhen Lin ZHONG, Yi Sui ZHOU, Bao Lian ZHANG, Xue Ran LU

中国化学快报. 1997, 8(03): 213-214.

摘要 ( )

可视化

5,11,17,23-Tetra-tertbutyl-25,27-dihydroxy-26,28-1',7',13'-trioxa-4',10'-dithiatridecene calix[4]arene (Calix[4]dithiacrown-5) was synthesized from tetra-tert-butyl-calix[4]arene via 1,3-lower rim functionallization with chloroethyltosylate,followed by ring-closing condensation with β,β'-dimercaptoethyl ether in the presence of sodium ethoxide as a base under nitrogen atmosphere.It was found that the calix[4]dithiacrown-5 can form a platinum complex and the complex can catalyze the hydrosilylation of olefins with triethoxysilane efficiently.

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Synthesis of Methylated β-Cyclodextrins Derived Optically Active Poly(N-diphenylmethyl maleimide)

Wei Hong LIU, Yong Ming CHEN, Chuan Fu CHEN, Fu XI

中国化学快报. 1997, 8(03): 215-218.

摘要 ( )

可视化

The methylated β-cyclodextrins derived optically active polymers are first synthesized through asymmetric polymerization of N-diphenylmethyl maleimide with lithium salt of heptakis (2,6-O-dimethyl) β-cyclodextrin (DM-β-CD) as an initiator.The resulting polymers show negative specific rotation which is opposite in sign to that of DM-β-CD.The asymmetric induction is further confirmed by circular dichroism.The structure is characterized by IR and NMR spectroscopies.

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Strong Inclusion Complexation Using Hydroxypropyl-β-Cyclodextrin as Host Molecule

Shu Qin LIU, Hui Zhi FAN, Wen Hui JIA, Jing Hao PAN

中国化学快报. 1997, 8(03): 219-220.

摘要 ( )

可视化

Inclusion complexes of nitro-compounds using β-cyclodextrin and hydroxypropyl-β-cyclodextrin as host molecule have been studied by cyclic voltammetric method.The inclusion constants of the corresponding complexes have been determined.Strong inclusion complexation by hydroxypropyl-β-cyclodextrin has been verified.

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Photochemical Reaction of 9,10-Anthraquinone Labeled Bovine Serum Albumin Conjugate

Qing Zhi ZHU, Jin Gou XU, Xiang Qun GUO, Xue Ying ZHENG, Wen You LI, Yi Bing ZHAO

中国化学快报. 1997, 8(03): 221-224.

摘要 ( )

可视化

Bovine serum albumin (BSA) was labeled with 9,10-anthraquinone and the photochemical fluorimetric reactivity of the covalently conjugated 9,10-anthraquinone was remarkably improved.The mechanism for the enhancement in the photochemical reactivity of conjugated 9,10-anthraquinone with BSA was discussed.

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A New Caffeoyl Conjugate from Erigeron Breviscapus

Jian Min YUE, Zhong Wen LIN, Han Dong SUN

中国化学快报. 1997, 8(03): 225-228.

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可视化

Erigoster A (1a),a new compound with a novel basic skeleton,was isolated from Erigeron breviscapus.The structure elucidation and complete proton and carbon NMR assignments were achieved by the utilization of a combination of two-dimensional NMR techniques.

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Daphkoreanin,a New Coumarin Glucoside from Daphne Koreana

Yan Ze LIU, Gang DING, Chun Ru JI, Yang Jie WU

中国化学快报. 1997, 8(03): 229-230.

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可视化

A new coumarin glucoside,daphkoreanin,has been isolated from the roots and stems of Daphne koreana.Its structure was established as 5-methoxy-7-hydroxy coumarin-8-O-β-D-glucoside by physico-chemical properties and ¹HNMR spectral analysis.

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Taxuchin B, a New Chlorine-Containing Taxoid

Wei Shuo FANG, Qi Cheng FANG, Xiao Tian LIANG, Yang LU, Nan WU, Qi Tai ZHENG

中国化学快报. 1997, 8(03): 231-232.

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可视化

A new taxoid,taxuchin B[1],has been isolated from twigs and needles of Taxus chinensis.It is the first chlorine-containing taxoid reported to date.

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Donhexocin, a New Non-tetrahydrofuran Acetogenin from Goniothalamus Donnaiensis

Zhong JIANG, De Quan YU

中国化学快报. 1997, 8(03): 233-234.

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可视化

A novel bioactive Amionaceous acetogenin,donhexocin (1),has been isolated from the roots of Goniothalamus donnaiensis (Annonaceae).1 is a new acetogenin lacking THF rings but bearing six hydroxyls including two vic-diol systems in the aliphatic chain.Its structure and stereochemistry has been elucidated by spectoscopic analysis and derivatization.

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A New Cytotoxic Dihydroxy Sterol from Laurencia Majuscula

Xiao Hua XU, Jing Yu SU

中国化学快报. 1997, 8(03): 235-236.

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可视化

24s-Stigmasta,4,25-diene,3β,6β-diol 1,a new sterol has been isolated from the algae Laurencia majuscula collected from the south China sea.Its structure was elucidated by spectroscopic methods.Compound 1 was cytotoxic against the P-388 cell line with an IC₅₀ value of 1.2 μg/ml.

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Alkaloids from Isatis indigotica

Ke Min DENG, Xiao Yun WU, Gen Jin YANG, Guo Wei QIN

中国化学快报. 1997, 8(03): 237-238.

摘要 ( )

可视化

Isaindigotone 1 and 3-(2'-hydroxyphenyl)-4(3H)-quinazolinone 2 were isolated from the roots of Isatis indigotica.Compound 1 was elucidated as a new alkaloid.Compound 2 was discovered for the first time from a natural source.

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Spectroscopic Properties of a Novel Zinc Phthalocyanine with four 17-Membered Crown Ether Voids

Guo Xiang XIONG, Jian Ping YE, Hui Jun XU

中国化学快报. 1997, 8(03): 239-242.

摘要 ( )

可视化

A zinc phthalocyanine containing (17-crown-5) ether subunits has been synthesized.UV-visible absorption and fluorescence emission spectra and associated photophysical parameters have been determined.In addition to the fluorescence at 710 nm from S₁.a strong upper excited state emission around 424 nm has been detected.X-ray structural analysis showed that the crown ether unit is conformationally deformed and oblate like that accounted for the unusual spectroscopic properties.

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Studies on Synthesis of Stationary Phase Containing Nicotinamide Adenine Dinucleotide (NAD) Bonded to Phospholipid-Coated Aminated Silica for HPLC

Jin Mao YOU, Zong Qin RUAN, Jing Wu KANG

中国化学快报. 1997, 8(03): 243-246.

摘要 ( )

可视化

Recently biospecific affinity chromatography has been widely used for the separation and purification of various enzymes and nucleic acids.In this paper,a series of synthetic reactions of solid-liquid phase were carried out on silica surface,using a macroporous (30μm), microspherical silica (8μm) as the matrix and γ-aminopropyltriethoxysilane as the activating agent,the nicotinamide adenine dinucleotide (NAD) was bonded through its amino groups to the carboxylic groups of linked phospholipid which was bonded covalently on aminated support.The bonded stationary phase has high thermal stability,and could be used to separate of nucleotides with good resolution.

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Studies on Zeolite Modified Electrode(Ⅰ)-Ascorbic Acid Sensor Based on Carbon Paste Electrode Containing Fe(Ⅲ) Y Zeolite

Ming Zhu ZOU, Hong Ding XU, Jie LU, Qin Hua Ru

中国化学快报. 1997, 8(03): 247-250.

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可视化

A new ascorbic acid sensor constituted of carbon paste and Fe(Ⅲ)Y zeolite was studied.The characters of the sensor such as linear range、potential window、apparent Michaelis constant、response time、stability and accuracy were investigated.The experimental results indicate that the analytical performance of the sensor is satisfactory.

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A Neutral Carrier Based Phosphate Sensor with Anti-Hofmeister Behavior

Dong LIU, Wen Can CHEN, Rong Hua YANG, Ru Qin YU

中国化学快报. 1997, 8(03): 251-254.

摘要 ( )

可视化

A PVC membrane electrode,using bis(tribenzyltin) oxide as the carrier,displayed selective response to hydrogen phosphate in the 5×10^-6mol/L to 10^-1mol/L activity range with a slope of -30.1mV/dec.in solutions of pH 7.2.The comparison of potential response characteristics between the binuclear and mononuclear organotin compounds has been made,showing that binuclear organometallic compounds may become a promising class of carriers for anions.

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A New Catalyst for Hydrogen Transfer Hydrogenation of Acetophenone

Pian Pian XU, Rong Hui ZHENG, Jing Xing GAO, Pei Qing HUANG, Hui Lin WAN

中国化学快报. 1997, 8(03): 255-258.

摘要 ( )

可视化

A new C₂-symmetric diamine/diphosphine Ruthenium (Ⅱ) complex,RuCl₂P₂N₂H₄.was used as an excellent catalyst to carry out the catalytic hydrogen transfer reduction of acetophenone.The conversion of acetophenone to 2-phenylethanol was up to 99% under the following reaction conditions: substrate: Ru: (CH₃)₂CHOK=200:1:12; reaction temperature of 65℃,reaction time of 2 h.normal pressure.A hydride transfer mechanism was also discussed.

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Synthesis and Crystal Structure of [Pd(NH₃)₄]Cl₂·2[Pd(NH₃)₃Cl]Cl

Pei Feng XING, Peng Ji ZHAO, Rui Liang HUANG, Ze Ning HUANG, Xue An CHEN, Hong LIANG, Zhi Guang QIAN

中国化学快报. 1997, 8(03): 259-262.

摘要 ( )

可视化

A new type of ammine palladium(Ⅱ) chloride was prepared by evaporating the solution of [Pd(NH₃)]₄Cl₂ at room temperature.Its crystal structure was refined from single-crystal X-ray data:P4₂/nmc,a=10.5390(10)Å,c=16.905(3)Å,Z=2,and R=0.0357 for 731 structure factors and 52 variable parameters.The framework of the title compound is composed of three sorts of structural units: [Pd(NH₃)₄]²⁺, [Pd(NH₃)₃Cl]⁺,and Cl^-,of which the first kind of least squares plane exhibits distortion in some degree.

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Research on PbS Nanoparticles Coated with 2,6-O-Diallyl-β-CD

Yun LING, Lin GUO, Liang ZHANG, Xi Cheng AI, Ruo Nong FU, Qian Shu LI, He Sun ZHU

中国化学快报. 1997, 8(03): 263-266.

摘要 ( )

可视化

PbS nanoparticles coated with 2,6-O-diallyl-β-CD were prepared successfully and characterized by transmission electron microscope (TEM),X-ray photoelectron spectrometer (XPS).The sample shows a very rapid induced absorption.

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1997年, 第8卷, 第03期　刊出日期：1997-03-20

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1997年, 第8卷, 第03期 刊出日期：1997-03-20

1997年, 第8卷, 第03期　刊出日期：1997-03-20