中国化学快报

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STUDY ON 1,2,3-DIAZAPHOSFHOLE V THE REACTION OF 1,2,3-DIAZAPHOSPHOLE WITH 2-BUTYNE-1,4-DIOL

Ru Yu CHEN, Bao Zhong CAI, Ke Sheng FENG

中国化学快报. 1992, 3(03): 157-158.

摘要 ( )

可视化

2-Acetyl-5-methyl-2H-1,2,3-diaraphosphole 1 reacted with 2-butyne-1, 4-diol to form a tricoordinated phosphorus compound 7, which then rearranged to a novel 2, 3-disubstituted-1, 3-diene.Similar rearrangement has been observed when diphenylchloropbosphine reacted with 2-butyne-1,4-diol.

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MICHAEL ADDITION OF NITROALKANE TO α,β-UNSATURATED CARBONYL COMPOUNDS ON KF/Al₂O₃/PEG4000

Lian An LIAO, AO, Qi Zhen GUO, Bang Ji LI, Xiao Yia WU

中国化学快报. 1992, 3(03): 159-160.

摘要 ( )

可视化

Michael addition of nitroalkanes to α,β-unsaturated carbonyl compounds occurs in the presence of KF/AI₂O₃/PEG4000 without solvent.Yields are fair to good and work-ups are easy.

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STUDIES ON THE SYNTHESIS AND ANTITUMOR ACTIVITY OF AMINO ACID ESTER DERIVATIVES OF BENZISOSELENAZOLONE

Xiu Fang LIU, Ying Xin XIAO, Guo Jun ZHANG, Han Sheng XU, Fan Bo ZHENG

中国化学快报. 1992, 3(03): 161-162.

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可视化

This paper reports a simple method for the synthesis of amino acid ester derivatives of benzisoselenazolone.Their anticancer activity is also given.

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SYNTHESIS OF 1-O-ACYL-2,3,4-TRI-O-ACETYL-β-D-XYLO-AND ARABINOPYRANOSES BY PHASE TRANSFER CATALYSIS

Guan Zhong SHUN, Liang Ju XUE

中国化学快报. 1992, 3(03): 163-164.

摘要 ( )

可视化

The acetylated xylo-and arabinopyranosyl esters (1-8) were obtained in high yields with stereoselectivity by phase-transfer catalyzed (PTC) synthesis, and their structures were confirmed by elemental analysis and IR,¹H-NMR spectral data.

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THE SYNTHESIS OF UNSYMMETRIC ANALOGS OF GOSSYPOL——6-O-METHYLGOSSYPOL

Hui Zhong XUE, Zheng Ming GUO, Ai Hua KONG, Guo Pci WU, Bai Yong MAO, Xiu Juan JIANG, Zhi Ping GU

中国化学快报. 1992, 3(03): 165-166.

摘要 ( )

可视化

6-O-Mcthylgossypol (3) was obtained with the methods of synthesis for the first time.

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SYNTHESES OF HINDERED ALKYL PHOSPHONATES AND PHOSPHONIC & PHOSPHINIC ACIDS

Wen Xiang HU, Cheng Ye YUAN, Shu Shen LI

中国化学快报. 1992, 3(03): 167-170.

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A series of di-n-hexyl alkyl phosphonates with bulky substituent on phosphorus was synthesized by PTC P-alkylation using crown ether.Upon saponification of the resulting di-n-hexyl alkylphosphonates in the presence of crown ether or quaternary ammonium halide, corresponding mono-hexyl esters of alkyl phosphonic acids were prepared.Ultrasonic wave, as we found, can catalyze the reaction between dialkyl phosphite & metallic sodium and hydrolysis of dihexyl alkyl phosphonates.A series of di-t-alkyl phosphinic acids were synthesized by the reaction of Grignard reagent with PCl₃ followed by oxidation with 30% H₂O₂.It was found that the reaction between dibutyl phosphite and Grignard reagent of t-alkyl chloride is a new synthetic method for the preparation of mono-esters of highly hindered alkyl phosphonic acids.

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BASIC HYDROLYSIS OF ETHYL OXAL-ACETATE AND SOME CHEMICAL CHARACTERS OF 3-ETHOXY CAEBONYL PYRUVIC ACID

Yun Zhen JIANG, Dong WEI, Zhi Zhong ZHAO

中国化学快报. 1992, 3(03): 171-172.

摘要 ( )

可视化

The products of basic hydrolysis of ethyl oxal-acetate and the preparation of 3-ethoxy carbonyl pyruvic acid 1 are reported.Esterification reaction of 1 with unhindered alcohols could be carried out smoothly, but it was unsuccessful with hindered alcohols.

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ENZYME REACTION IN AQUEGUB-ORGANIC BYSTEM——KINETIC RESOLUTION OP RACEMIC OXIRANECARBOXYLIC ESTERS WITH LIPASE

Jian Xing GU, Zu Yi LI

中国化学快报. 1992, 3(03): 173-174.

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可视化

The chiral oxiranecarboxylic acids or esters 2a-e were obtained with lipase (CCL) in aqueous-organic system.The ee and the absolute configurations of the products were determined.

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HIGHLY REGIOSELECTIVE O-AND N-ACYLATION OF 5-METHYL-3-HYDROXYISOXAZOLE

Rui Lian SHAO, Cheng Xin ZHI, You Quan ZHU, Jie You XUE

中国化学快报. 1992, 3(03): 175-176.

摘要 ( )

可视化

Acylation of 5-methyl-3-hydroxyisoxazole (1) with 3-substituted cyclopropanecarboxylic chlorides (3) in the presence of triethylamine (TEA) in acetonitrile yields predominantly O-acylated products (4).The N-acyl isomers (5) are afforded regiospecifically using trimethylsilyl ether of 3-hydroxyisoxazole (2).

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A NEW SYNTHETIC ROUTE TO α-DAMASOONE

Ai Lian ZHENG, Yuan Lia WU

中国化学快报. 1992, 3(03): 177-178.

摘要 ( )

可视化

A new synthetic route to α-damascone (4) starting from citral is described-The synthesis features allylatioa of α-cyclocitral (1) with allylic bromide in the presence of tin powder to give the crucial intermediate 1-(2',6',6'-trimethylcyclo-hexen-2'-yl)-3-buten-1-ol (2a) and (2b) in a combined yield of 70%.

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NEW HETEROCYCLIC SYSTEM SYNTHESIS Ⅲ REACTIONS OF 1,2-DIHYDRO-2,4-DISUBSTITUTED-1,5-BENZODIAZEPINE WITH DICHLOROCARBENE

Xin Yu ZHANG, Sheng JIN, Ren An. LIAO

中国化学快报. 1992, 3(03): 179-180.

摘要 ( )

可视化

Three kinds of products have been separated from the reaction mixtures of 1,2-dihydro-2, 4-disubstituted-1,5-benzodiazepine with:CCI₂.Besides the addition products of:CCI₂ to C=N.the inserted products of:CCI₂ to N-H and C-H single bonds were obtained, too.

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NEW HETEROCYCLIC SYSTEM SYNTHESIS IV.4a, 5,6, 12-TETRAHYDRO-1H-1,3-OXAZlNO [3,2-d] [1,5]-BENZOTHIAZEPINE-1-ONE

Jia Xi XU, Sheng JIN

中国化学快报. 1992, 3(03): 181-182.

摘要 ( )

可视化

Addition of a-carbonylketenes, generated from 2-diazo-1, 3-diaryl-1, 3-propandione or 2-diazo-1-phenyl-1,3-butandione by heating, to 2,4-diaryl-2,3-dihydro-[1,5]-benzothiazepines gave 2,3-disubstituted-4a, 6-diaryl-4a,5,6,12-telrahydro-1H-1, 3-oxazino[3,2d] [1,5]-benzothiazepine-l-ones, a new ring system.

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STUDIES ON THE REACTION OF α-ACETAMIDCCINNAMAMIDE WITH TRIS (DIETHYLAMINO)PHOSPHINE

Chen Xi LI, Ru Yu CHEN

中国化学快报. 1992, 3(03): 183-184.

摘要 ( )

可视化

α-Acetamidocinnamamide do not react with P(OMe)₃, with P(NEt₂)₃ they give rise to 2-methyl-4-hydroxy-5-α-[bis (diethylamino) phosphoryl] benzyl imidazole.The pathway is studied for the formation of Ⅰ. The two intermediates(Ⅱ) are isolated.The structures of Ⅰ and Ⅱ are confirmed by IR, ¹H NMR, ³¹P NMR, Ms.

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NEW CLERODANE DITERP ENOIDS FROM TINOSPORA GAPILLIPES

Chun Qing SONG, Ren Sheng XU

中国化学快报. 1992, 3(03): 185-188.

摘要 ( )

可视化

New clerodane diterpenoids-tinocallone A, B, C, D and epitinopaylloloside (1-4.and 8) have been isolated from the root of Tinospora capillipes.Their structures were elucidated by chemical and spectral analysis.

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TWO NEM ISOPRENYL PLAVONOIDS FROM THE LEAVES OP GLYCYRRHIZA URALENSIS FISOH

Shi Shan JIA, Dong LIU, Xiu Pin ZHENG, Yong ZHANG, Yong Kang LI

中国化学快报. 1992, 3(03): 189-190.

摘要 ( )

可视化

Three flavonoids have been isolated from the leaves of Glycyrrhiza uralensis Fisch (licorice,Leguminosae).The structures have been identified as 5,7,3',4'-tetrahydroxy-3-methoxy-5'-isoprenyl flavone (I,uralenol-3-methylether),5,6,3',4'-tetrahydroxy-3-methoxy-6'-isoprenyl flavone (Ⅱ, unalene) and quercetin (Ⅲ).Ⅰ and Ⅱ are new compound.

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THE VERIFICATION OF THE CURRENT TRANSIENT EQUATION AT TUBULAR ELECTRODES IN A FLOWING FLUID UNDER POTENTIAL STEP

Song Ying MO, Ying Sing FUNG

中国化学快报. 1992, 3(03): 191-192.

摘要 ( )

可视化

The equation derived for the response of the current transients in the flowing fluid is verified experimentally.

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CORRECTION OF WING INTERFERENCE WITH KALMAN FILTERING IN INDUCTIVELY COUPLED PLASMA ATOMIC EMISSION SPECTROMETRY

Jin Fu YANG, Zhe Xiu PIAO, Xian Jin ZENG, Zhuo Yong ZHANG, Xin Hai CHEN

中国化学快报. 1992, 3(03): 193-196.

摘要 ( )

可视化

A Kalman filter was developed for correction of wing interference in ICP-AES.Modeling wing interference theoretically instead of experimentally, the filter can compensate the shift in wavelength position in scans, and therefore reduce the effect of the interference on detection limit.

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PREPARATION AND EVALUATION OF HPLC BONDED PHASE WITH L-PROLINE LIGAND

Tian Bao HUANG, Bang Gui WU, Yuan De LONG, Jing Xian ZHOU

中国化学快报. 1992, 3(03): 197-200.

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This paper describes a simple method for the preparation of L-proline stationary phase bonded to silica gel and characterization of the bonded phase by IR spectrometry, elemental analysis and nitrogen adsorption method at low temperature.The enantiomeric resolutions of 3-(2-pyridyl)-3-aminopropionic acid and 2,3-diaminobutanoic acid on the bonded phase were carried out.

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SPECTROPHOTOMETRIC STUDY OF DDQ CHARGE-TRANSFER COMPLEXES WITH 1,10-PHENANTHROLINE AND ITS DERIVATIVES

Shen Yang TONG, Li NA

中国化学快报. 1992, 3(03): 201-204.

摘要 ( )

可视化

1,10-phenanthroline and its derivatives can form charge-transfer complexes with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ).The absorption spectra and conditions of complex formation,such as the reaction time,the quantity of DDQ, and the solvents, have been studied.After the HMO calculation of phenanthrolines,the molar absorptivities were found to depend on the substituents on the phenanthroline rings.

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THE SECOND RECIPROCAL DERIVATIVE CHRONOPOTENTIOMETRY ANALYSIS

Xiang Yuan RUAN, Ju Nan LI, Yi Hen LI, Jian Cheng DENG

中国化学快报. 1992, 3(03): 205-206.

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Theories of the second reciprocal derivative chronopotentiometry analysis were deduced and experimentally verificated.Results in this study show that chronopotentiometry is significantly developed in both sensitivity and resolution for signals treated by the second reciprocal derivative.

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STRUCTURE OF THERMOTROPIC LIQUID CRYSTALLINE VANILLIC ACID/P-HYDROXYBENZOIC ACID/ETHYLENE TEREPHTHALATE VHE TERPOLYESTERS

Xin Gui LI, Mei Rong HUANG, Gui He GUAN, Tong SUN

中国化学快报. 1992, 3(03): 207-210.

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可视化

Thermotropic liquid crystalline VHE terpolyesters made from vanillic acid (V),p-hydroxybenzoic acid (H) and poly (ethylene terephthalate) (E) were studied by 400 MHz NMR spectra, wide angle X-ray diffraction,scanning electron and polarizing microscopes.It was found that the VHE terpolyesters had random sequence distribution.The VHE terpolyester films exhibited highly oriented fibrillar structure.

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CRYSTAL STRUCTURE OF DI-NITRATOBIS(ETHYLCAPROLACTAM)URANYL(Ⅱ) UO₂ [CH₂ (CH₂)₄ CONC₂H₅]₂ (NO₃)₂

Zheng Bai CAO, Han Zhang WANG, Zhen Rong LU, Li Min ZHU, Jian Sheng GU, Song Shan GUO, Kai Bei YU

中国化学快报. 1992, 3(03): 211-212.

摘要 ( )

可视化

The crystal structure of Di-nitratobis (ethylcaprolactam)uranyl (Ⅱ) UO₂ [CH₂ (CH₂)₄ CONC₂H₅]₂ (NO₃)₂ was established by a single-crystal X-ray diffraction study.It is triclinie, space group P1, with a=7.171 (2), b=8.655 (3), c=10.182 (5)Å, α=78.27 (3), β=70.63 (3), γ=81.76 (3)°, V=581.7 (4)Å³, Z=l, Dc=1.94 g.cm^-3.Final R value is 0.0218.The result reveals that uranyl ion is coordinated to six oxygen atoms, two of them are from two carbonyl groups of ethylcaprolactam and the other four are from two nitrate groups.

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A MODIFIED METHOD FOR THE PREPARATION OF GOETHITE

Zhi Long SHEN

中国化学快报. 1992, 3(03): 213-214.

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Synthetic goethite (α-FeOOH) was prepared in the laboratory using a modified version of Brauer's method^[1].The process of steam-crystallization was prolonged and impurities were removed by dialysis.The products have been characterised by Surface Area Analyser and Scanning Electron Microscope, and proved to have larger Specific Surface Area than that in literature.

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STUDY OH PHo₁₂O₄₀^3--POLYANILINE MODIFIED ELECTRODE

Jun Wei ZHENG

中国化学快报. 1992, 3(03): 215-216.

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可视化

Electrochemical Betted not only can obtain the conducting film of polyaniline on a glass carbon electrode, but also can imobilize PMo₁₂O₄₀^3- in the film to form a organic conducting film electrode modified by heteropolyanion.The paper here reports electrochemical changes in the preparation of PMo₁₂O₄₀^3--polyaniline modified electrode, the electrochemical reaction mechanism of the modified electrode was obtained from the study on its redox properties.Moreover, the above electrode showed marked electrocatalysis for the reduction reaction of CIO₃^-.

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THE APPLICATION OF MICROELECTRODE TO THE STUDY OF MULTISTEP ELECTRODE PROCESSES UNDER STEADY STATE CONDITIONS PART I EE MECHANISM

Qian Kun ZHUANG, Hong Yuan CHEN

中国化学快报. 1992, 3(03): 217-218.

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Under steady-state conditions, the general currents of EE reactions at disk,hemispherical and spherical microelectrodes are derived.From these equations, some electrode reaction parameters can be very simply obtained.

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PHASE SEPARATION OF RETINAL SCHIFF BASE IN TWO-COMPONENT LB FILM WITH DIFFERENT LIPIDS

Long. JIANG, Dirk. HONIG, Dietmar. MOBIUS

中国化学快报. 1992, 3(03): 219-222.

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可视化

Phase sepertion of 9-cis-retinal schiff base in two-component LB film with different lipids has been observed under Brewster Angle Microscope.

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PHOTOCATALYTIG DECOMPOSITION OF METHANOL BY VC1₂ AND TRANSFER OF HYDROGEN AND METHYL FREE RADICALS

Chang Ping SHAO

中国化学快报. 1992, 3(03): 223-226.

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可视化

The photocatalytic decomposition of methanol in the presence of vanadium dichloride and the transfer of hydrogen and methyl free radicals to the additives and dinitrogen were reported.

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THE PREPARATION CHEMISTRY OF V/MgO CATALYST FOR OXIDATIVE DEHYDROGENATION OF ETHYLBENZENE

Shu CHEN, Biao Hua CHEN, Guo Yin LI, Yuan Gen YIN

中国化学快报. 1992, 3(03): 227-230.

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可视化

The structures and catalytic performances of V₂O₅, Mg₃V₂O₈ and V/MgO catalysts have been correlated by means of XRD, FTIR, TPR and flow micro-reactor tests. The postulation about active site has been made. Based on it, better catalysts have been first prepared via grafting and modification with Sb which are better than that via impregnation.

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ELECTROSTATICALLY STABILIZED AGGREGATE (ESAg) Ⅱ.EVIDENCE DERIVED FROM THE COAGGREGATING BEHAVIOR OF A CATIONIC KINETIC PROBE (P16⁺) WITH SURFACTANTS

Xi Kui JIANG, Guo Zhen JI, Jian She WANG

中国化学快报. 1992, 3(03): 231-234.

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可视化

The coaggregating behavior of the cationic kinetic probe P16⁺ with different types of surfactants are in complete agreement with predictions based on the newly proposed ESAg concept.

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1992年, 第3卷, 第03期　刊出日期：1992-03-20

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1992年, 第3卷, 第03期 刊出日期：1992-03-20

1992年, 第3卷, 第03期　刊出日期：1992-03-20