中国化学快报

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A FACILE TOTAL SYNTHESIS OF (±)-SELINA-3,11-DIEN-9-OL

Li Jun LIU, Zhao Ming XIONG, Fa Jun NAN, Tong Shuang LI, Yu Lin LI

中国化学快报. 1994, 5(09): 721-724.

摘要 ( )

可视化

A facile total synthesis of (±)-selina-3,11-dien-9-ol (1) has been described,The key step is the onepot reductive fragmentation of α,β-unsaturated p-tosylhydrazone and reduction of 9-carbonyl of 5 with sodium borohydride.

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NEW SYNTHETIC ROUTE TO ALKOXYPHOSPHORANES

Lun Zu LIU, Guo Wei LI, Xing Zhong ZENG, Ao ZHANNG, Xiao Dong SHI, Zhong Biao ZHANG

中国化学快报. 1994, 5(09): 725-726.

摘要 ( )

可视化

A series of hydridophosphoranes reacted with benzenesulfenic esters to give the corresponding alkoxyphosphoranes in good yields.

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SYNTHESIS OF NEW BENZOXEPINOQUINOLINONES

Yong Jun GAO, Chun Jie LI, Bi Shan JIANG, Gui Ji JIANG

中国化学快报. 1994, 5(09): 727-728.

摘要 ( )

可视化

New series heterotetracyclic ketones,1-benzoxepino[4,3-b] quinolin-13(6H)-one derivatives,were prepared in good to excellent yields.

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STUDY ON THE REACTION OF N-ALKYLPHENOTHIAZINE RADICAL CATIONS WITH 2, 4-DINITROPHENYLHYDRAZINE

You Cheng LIU, Bo LIU, Qing Xiang GUO

中国化学快报. 1994, 5(09): 729-732.

摘要 ( )

可视化

The reactions of N-alkylphenothiazine (1) radical cations with 2,4-dinitrophenylhydrazine (2) were studied,Product analysis showed that the oxidative coupling product 3-(2',4'-dinitrophenylazo)-N-alkylphenothiazine (3) was formed,which was characterized by MS,IR,NMR and X-ray diffraction.

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ASYMMETRIC REDUCTIONS OF ENONES INDUCED BY β-CYCLODEXTRIN

Ji Ben MENG, Hong MA, Yong Mei WANG

中国化学快报. 1994, 5(09): 733-736.

摘要 ( )

可视化

The asymmetric reduction of ferrocenylenone in β-CD inclusion complex has been investigated.The results showed that one-step redaction gave higher enantioselectivity than reduction of the pre-formed inclusion complex of β-CD and enone,and that the use of inorganic salts improved the enantioselectirity.However,quarternary ammonium salts accelerated the redaction but had little effect on the enantioselectivity.

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MANNICH REACTION OF HGeCl₃ WITH BENZYL AMINE AND AROMATIC ALDEHYDES

Li Juao MAO, Ru Yu CHEN

中国化学快报. 1994, 5(09): 737-740.

摘要 ( )

可视化

The Mannich reaction of HGeCl₃ has been studied for the first time,giving good yields.However,the products are relatively unstable,gradually decomposing into (GeCl₂)n,corresponding aldehyde and amine salt,On the contrary,its sesquioxide is very stable and was smoothly obtained.

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STUDY ON OXIDATION OF BENZYL ETHERS BY AMMONIUM CHLOROCHROMATE

Li DING, Mi Feng, CHEN Kun CAI

中国化学快报. 1994, 5(09): 741-742.

摘要 ( )

可视化

Ammonium chlorochromate (NH₄CrO₃Cl,ACC) was used to oxidize benzyl athers to the corresponding benzoates under dry conditions as well as in the mixed solvent of DMF and HOAc.

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STUDIES ON CHEMICAL CONSTITUENTS OF MALLOTUS ANOMALUS, Ⅱ. STRUCTURES OF THE ANTITUMOR COMPONENTS FROM MALLOTUS ANOMALUS

Sheng Cu FENG, Zone Jian TANG, Yi Ping YANG, Ren Shenq XU, Qionq Xinq ZhONG, Yi ZHONG

中国化学快报. 1994, 5(09): 743-746.

摘要 ( )

可视化

Two new maytansinoid compounds, mallotusine and isomallotusine from Mallotus anomalus showed strong antitumor activity in vitro and in vivo test. Their structures were established by intensive 2D NMR techniques and MS spectral analyses as well as comparison with that of maytansine.

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THREE NEW BIOACTIVE ANNONACEOUS ACETOGENININS FROM ANNONA MURICATA

Chao Ming LI, Qing MU, Xiao Jiang HAO, Han Dong SUN, Hui Lan ZHENG, Yang Chang WU

中国化学快报. 1994, 5(09): 747-750.

摘要 ( )

可视化

Three new bioactive mono-tctrahydrofuranic γ-lactone acetogenins,named muricatin A(1),b(2),C(4) respectively and a known compound gigantetrocin (3),were isolated from Annona muricata Linn.Their structure elucidation was achieved by spectroscopic means.

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A NEW CYCLOPEPTIDE FROM ARENARIA JUNCEA

Yu Rui ZHAO, Jun ZHOU, Xian Kai WANG, Xiao Lin HUANG, Hou Ming WU, Tong Fang ZHAO

中国化学快报. 1994, 5(09): 751-754.

摘要 ( )

可视化

A new cyclopeptide named arenarin A(1) was obtained from the roots of Arenaria juncea Bieb and its structure was established to be cyclo(Ser-Ser-Phe-lle-Pro-Pro-Phe) by a combination of 2D-NMR and FABMS.

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TWO NEW C₁₉-DITERPENE ALKALOIDS FROM DELPHINIUM SWINANENSE VAR LEPTOPOGON

Suo Ming ZHANG, Qing Yu OU, Wei Le YU

中国化学快报. 1994, 5(09): 755-756.

摘要 ( )

可视化

An investigation of the alkaloids of Delphinium swinanense var.leptopogon resulted in the isolation and identification of two new C₁₉-diterpene alkaloids named swinanine A and B,together with one known tatsiensine.The structures of the new alkaloids were established from spectral evidence.

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INULOSIDE A AND B. TWO NEW DITERPENE GLYCOSIDES FROM INULA BRITANNICAL. VAR CHINENSIS

Yu SHAO, Nai Shen BAI, Bing Nan ZHOU

中国化学快报. 1994, 5(09): 757-760.

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可视化

Two new diterpene glycosides,inulosides A and B,have been isolated from Inula britannica L. var chinensis and their structures established as (-)-17-O-β-D-glucopyranosyl-16α-kauran-19-oic acid and (-)-17-O-β-D-glucopyran-osyl-16α-kauran-19-oic acid-19-O-β-D-glucopyranoside,respectively,through spectral data,and chemical and enzymatical methods.

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ASTERYUNNANOSIDE E,A NEW TRITERPENOID SAPONIN FROM ASTER YUNNANENSIS FRANCH

Yu SHAO, Bing Nan ZHOU, Long Ze LIN, GeoffFey A. Cordell

中国化学快报. 1994, 5(09): 761-764.

摘要 ( )

可视化

A new oleanane-type triterpene saponin,asteryunnanoside E,has been isolated from the roots of Aster yunnanensis Franch,and its structure elucidated as 3-O-β-D-glucopyranosyl-bayogenin-28-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranoside by means of spectral data particularly 2D NMR including COSY,HETCOR,HOHAHA and ROESY techniques and chemical transformation.

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CAPILLARY ZONE ELECTROPHORESIS AND MICELLAR ELECTROKINETIC CAPILLARY CHROMATOGRAPHY OF SOME PROTECTED AMINO ACIDS AND PEPTIDES

LI ZHANG, Rong Hul YANG, Sheng JIN

中国化学快报. 1994, 5(09): 765-766.

摘要 ( )

可视化

The possibilities of capillary zone electrophoresis (CZE) and micellar electrokinetie capillary chromatography (MECC) were investigated for the qualitative analysis of ten protected amino acids and peptides,The results show that MECC method has a better separation than CZE for these compounds.

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INDIRECT THERMO-OPTICAL DETECTION FOR CAPILLARY ELECTROPHORESIS SEPARATION OF AMINO ACIDS

Ji Cun REN, Bing Cheng LI, Yan Zhuo DENG, Jie Ke CHENG

中国化学快报. 1994, 5(09): 767-768.

摘要 ( )

可视化

In this letter,we first reported a novel method——indirect thermo-optical detection used in CE separation of native amino acids.By using methylene blue as background absorber,the detection limit for lysine was 5×10^-6 mol/L.

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MICROELECTRODE VOLTAMMETRIC STUDY OF C₇₀

Nan Qiang LI, Wei jun HE, Zhen Nan GU, Xi Huang ZHOU, Yi Liang SUN, Yong Qing WU

中国化学快报. 1994, 5(09): 769-772.

摘要 ( )

可视化

The successive six step reductions of C₇₀ in watar-free acetonitrile-xylene (1:4) mixed solvent containing 0.1 mol/L tetrabutylammonium hexafluorophosphate (Bu₄NPF₄) were obtained at below 20℃ by using Au and Pt microdisk electrodes.Several electrochemical data were determined.

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IMMOBILIZATION OF GLUCOSE OXIDASE AND CELLULASE BY ENTRAPMENT OF HYDROGEN-BOND COMPLEX

Chang De ZHANG, Ling Zhi WANG, Ying Yan JIANG

中国化学快报. 1994, 5(09): 773-776.

摘要 ( )

可视化

Glucose oxidase (GOD) and cellulase were immobilized on the hydrogen-bond complex of chitosan and sodium carboxymethyl cellulose,The immobilized GOD (IG) can be used in a wider pH range,and its optimum temperature was increased 50℃ higher than its native state;While the optimum temperature of the immobilized cellulase (IC) was increased 20℃ The storage life of IG and IC were prolonged greatly,Both of them can be reused many times,and have a high catalytic activity,Their Michaelis constants Km were determined.

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POTASSIUM FLUORIDE ON ALUMINA CATALYZED ALDOL CONDENSATION OF INDENE AND ACETOPHENONE

Weng Xing LU, Chao Guo YAN, Hui Fen GU

中国化学快报. 1994, 5(09): 777-778.

摘要 ( )

可视化

Alumina coated with potassium fluoride is proved to be a potential solid base catalyst for aldol condensation of indene and acetophenone with aromatic aldehydes,benzofulvenes and chalcones are synthesized in high fields.

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PREPARATION AND CATALYTIC HTDROGENATION BEHAVIOUR OF POLYMERIC PORPHYRIN-PALLADIUM COMPLEX

Rong Min WANG, Yun Pu WANG, Jian XIONG, Zi Qiang LEI

中国化学快报. 1994, 5(09): 779-780.

摘要 ( )

可视化

The complex of palladium with the polymeric meso-tetraphenylporphyrin which is linked by terephthalate has been synthesized.The complex possesses a high catalytic activity for the hydrogenation of 1-hexene and nitrobenzene,and it has been found that the catalytic activity is affected by reaction temperature,concentration of the substrate and the amount of catalyst.

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STUDIES ON CALIXARENES I THE CNDO/2 CALCULATION OF EQUILIBRIUM MOLECULAR GEOMETRY OF CALIX[4]ARENE IN CONE CONFORMATION

Yong LI, Yan Zhao ZHENG, Jin Liang GUO, Xin Qi SONG

中国化学快报. 1994, 5(09): 781-784.

摘要 ( )

可视化

The equilibrium molecular geometry of 25,26,27,28-tetrahydroxycalix[4]arene in cone conformation was calculated by a CNDO/2 method based on the standard geometrical models.The results are in good agreement with those obtained from X-ray analysis.

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CROSSED SUPERSONIC MOLECULAR BEAM STUDY OF Cl+CH2I2→ICl+CH2I

Jian Xin QI, Guang Jun WANG, Yong Xiang SHA, Hou Ming YIN, Guo Zhong HE, Nan Quan LOU

中国化学快报. 1994, 5(09): 785-788.

摘要 ( )

可视化

The reaction Cl+CH₂I₂→ICl+CH₂l has been studied at a relative collision energy of 53.2 kJ/mol using the crossed beam technique.Angular and translational energy distributions of reactively scattered ICl products have been measured.The angular distribution is consistent with reaction occurring through a short lived complex with life time about 0.8 of the rotational period.The kinetic energy distributions measured for this system show strong coupling to scattering angles.The forward and backward scattered products have higher translational energy than sideways scattered.A phase space model is developed which can give a good explanation for the experimental energy distributions.

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SCANNED LASER SPOT PHOTOCURENT RESPONSE STUDIES OF FERROCENE DERIVATIVE LB FILMS MODIFED CdSe THIN FILM ELECTRODES

Yuan LIN, Xu Rui XIAO, Yong YANG, Xu Guang CHEN, Jing Kua YOU

中国化学快报. 1994, 5(09): 789-790.

摘要 ( )

可视化

Photocurrent behaviours of 1,1'-di linolene ferrocenyl LB films modified CdSe thin film electrode were studied by scanned laser spot method.The increase in photocurrent response of modified electrode compared to the bare electrode was analyzed by statistical calculation, The acceleration of interfacial electron transfer by modified molecules which act as redox mediator was discussed.

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LASER-ENHANCED ELECTROCHEMICAL DOPING OF POLY (N-VINYLCARBAZOLE)

Yan Ling LI, Jun Hui YANG, Ji Ren XU

中国化学快报. 1994, 5(09): 791-794.

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可视化

Laser-electrochemical doping of poly(N-vinylcarbazole) (PVK) leads to the formation of high conducting PVK polymers.The doped polymers were characterized by IR spectra and electrical conductivity measurement.The results show that the photochemical effects from laser irradiation on the working electrode speed up the reaction rate and increase the doping degree of ClO₄^- counterion.

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SYNTHESIS OF THERMOTROPIC LIQUID CRYSTAL AROMATIC COPOLYESTERS AND COPOLY (ESTER-AMIDE)S CONTAINING DI (ETHYLOXY-ETHER) AS THE SPACER

Shang Er WANG, Zhi Shen MO, Hong Fang ZHANG, Zhi Liu FENG

中国化学快报. 1994, 5(09): 795-796.

摘要 ( )

可视化

Flexible di(ethyloxy-ether) was introduced into the aromatic copolyesters and copoly(ester-amide)s to reduce the melting point of resulting polymers.The liquid crystallinity was proved by PLM observation and WAXD study.The melting point was greatly reduced,to 200℃ or even lower in some cases,and the molecular weight was satisfactorily high as reflected by inherent viscosity.The copolyester showed better crystallinity and liquid crystallinity than corresponding copoly(ester-amide) with similar monomer composition.

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REACTIVE POLY(ARYLENEETHERSULPHONE):MALEIMIDE-TERMINATED POLY(ARYLENEETHERSULPHONE) OLIGOMERS USING N-(4-HYDROXYPHENYL) MALEIMIDE AS AN ENDBLOCKING MONOMER

Lian Lai ZHANG, Yi GU, Lu Xia JIANG, Xing Xian CAI

中国化学快报. 1994, 5(09): 797-798.

摘要 ( )

可视化

A new procedure has been developed successfully to prepare the maleimide-terminated poly (arylene ether sulphone) oligomers,It was conducted by the aromatic nucleophilic substitution of the chloro-terminated poly (arylene ether sulphone) oligomer by an endblocking monomer,N-(4-hydroxyphenyl) maleimide.The reaction and structure of the product were confirmed by FT-IR.¹H-NMR and elemental analysis.

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FERROMAGNETICALLY COUPLED BINUCLEAR Fe(Ⅲ) COMPLEXES THROUGH ISOPHTHALATO-BRIDGE

Yan Tuan LI, Dai Zheng LUO, Zong Hui JIANG, Geng Lin WANG

中国化学快报. 1994, 5(09): 799-802.

摘要 ( )

可视化

Four new binuclear Fe(Ⅱ) complexes containing the dianion of isophthalic acid as bridge have been synthesized,namely[Fe₂(IPHTA) (L)₄] (ClO₄)₄ [L denotes 2,2'-bipyridyl(bpy);1,10-phenanthroline (phen);4,4'-dimethyl-2,2'-bipyridyl (Me₂bpy) and 5-nitro-1,10-phenanthroline (NO₂-phen),respectively],where IPHTA represents the isophthalate dianion.The complex[Fe₂(IPHTA)(phen)₄](ClO₄)₄ was characterized with variable temperature magnetic susceptibility (4-300K).The exchange integral J was found to be 9.96 cm^-1,indicating that weakly ferromagnetic spin-exchange interaction operates between Fe(Ⅱ) and Fe(Ⅱ) ions.

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PREPARATION, ELECTRICAL PROPERTIES AND CRYSTAL STRUCTURE OF TWO NEW CHARGE-TRANSFER SALTS (BEDT-TTF) ₃Cu₂Brx AND (TTM-TTF) (Cu₂Bry) (y~4.72)

Sheng Gao LIU, Pei Ji Wu, Dao Ben ZHU

中国化学快报. 1994, 5(09): 803-806.

摘要 ( )

可视化

Two new organic conductor-semiconductor with Cu-containing binuclear polyhalide complex anion (BEDT-TTF)₃Cu₂Brx(A) and (TTM-TTF) (Cu₃Bry) (B) are prepared and the crystal structure of B is determined,The conductivity of the crystal A and B at room temperature along the crystal growth direction is about 10 and 7■10^-4 S.cm^-1,respectively.

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SYNTHESIS,STRUCTURE AND LUMINESCENCE PROPERTIES OF K₂VOF₅ AND K₃VO₂F₄

Hong Jie ZHANG, A. GARCIA, F. GUILLEN, J. P. CHAMINADE, C. FOUASSIER

中国化学快报. 1994, 5(09): 807-808.

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可视化

The luminescence properties of K₂VOF₅ and K₃VO₂F₄ are reported for the first time.The really interesting result obtained is the observation of vibration structure in the emission band of the new compound,K₂VOF₅,at 4.2K The vibrational mode involved for K₂VOF₅ is V-O stretching vibration.

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THE PREPARATION AND CHARACTERIZATION OF ZnO-Ag CORE-SHELL ULTRAFINE PARTICLE

Si Hai ChEN, Xin Min REN

中国化学快报. 1994, 5(09): 809-810.

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可视化

The ZnO-Ag core-shell ultrafine particle in ethanol was prepared by photoreduction and colloidal methods.The experimental results obtained from absorption spectroscopy,fluorescence spectroscopy and electron microscopy revealed that the structure of the hybrid particle is ZnO core covered with Ag shell.The thickness of the silver layer can be controlled by the concentration of Ag⁺ ions and the time of UV irradiation.The structure of the electric double layer of the ZnO seed greatly affects the formation of ZnO-Ag hybrid particle.

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HIGH DISPERSION OF CUPRIC CHLORIDE INTO ZEOLITE BETA BY MICROWAVE TECHNIQUE

Qun ZHOU, Wen Guo XU, Shi Lun QIU, Wen Qin PANG

中国化学快报. 1994, 5(09): 811-814.

摘要 ( )

可视化

By using microwave technique,cupric chloride was highly dispersed into zeolite Beta with critical dispersion capacity of 0.6 g CuCl₂·2H₂O/g Beta,From the IR results,it was found that solid state ion-exchange process of copper ions and dispersion process of cupric chloride molecules could simultaneously occur during microwave treatment.High dispersion of cupric chloride molecules results in more active sites for CO adsorption in zeolite Beta.

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本期目录

1994年, 第5卷, 第09期　刊出日期：1994-09-20

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1994年, 第5卷, 第09期 刊出日期：1994-09-20

1994年, 第5卷, 第09期　刊出日期：1994-09-20