中国化学快报

Select

A NEW METHOD FOR SYNTHESIS OF O-ISOPROPYL SUBSTITUTED AROMATIC COMPOUNDS

Xue Chao WANG, Xin Fu PAN

中国化学快报. 1992, 3(05): 329-332.

摘要 ( )

可视化

Heteroatom-directed aromatic lithiation reactions usedfor the regiospecific synthesis of o-isopropyl substituted phenolic andbenzyl alcoholic compounds are described

Select

FACILE SYNTHESES OF PLUMBAGIC ACID

Xue Chao WANG, Xin Fu PAN, Xin Mei GE, Gong Cheng ZHANG

中国化学快报. 1992, 3(05): 333-334.

摘要 ( )

可视化

Plumbagic acid[β-(2, 3-dihydroxybenzoyl)butyric acid](1), hasbeen synthesized from commcrcially available catechol by two facile routeswith overall yields of 18.6% and 53.5%, rcspectively

Select

SOME SYNTHETIC STUDIES RELATED TO PERYLENEQUINONES

Xu Sheng ZHANG, Pang ZHANG

中国化学快报. 1992, 3(05): 335-336.

摘要 ( )

可视化

The double oxidative coupling of methyl 8-bromo-3, 4-dihydro-xy-5, 7-dimethoxy-2-naphthylacetate and its solvent effect are studied.Demethylation followed by methylation or vice versa of dimethyl-2, 11-dihy-droxy-4, 6, 7, 9-tetramethoxy-3, 10-perylenequinone-1, 12-diacetate can beeffected regioselectively and amenable to natural product synthesis

Select

A STUDY OF ACYLATION OF AN ENAMINE AND A NOVEL SYNTHESIS OF 4-PYRONES

Jian Qing LU, Shi Yu WANG, Pang ZHANG

中国化学快报. 1992, 3(05): 337-338.

摘要 ( )

可视化

The acylation of 3-pentanone enamine was studied and a novelformation of 4-pyrones from <β-diketone enol esters was found involvingan intramolecular O-to C-acyl shift followed by cyclization

Select

NEW METHODS FOR AROMATIZATION OF STEROIDAL 2, 5(10)-DIENES

Guang Dian HAN, Hong Yan WEN

中国化学快报. 1992, 3(05): 339-340.

摘要 ( )

可视化

New methods for dehydrogenation of steroidal 2, 5(10)-dienes with2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone (DDQ) or pyridinium hydrobromideperbromide(PHP, Py·HBr·Br₂) to aromatic A ring steroid in quantitative yield inshort time are described

Select

SYNTHESIS AND REACTIVITY OF SPIROHYDRIDOPHOSPHORANE CONTAINING α-AMINOACETOXY GROUP

Lun Zu LIU, Guo Wei LI, Ming Zhi HUANG, Zhong Biao ZHANG

中国化学快报. 1992, 3(05): 341-342.

摘要 ( )

可视化

Reaction of glycine with phosphorus trichloride in presence of triethylamine hasurnished the ovel spirohydridophosphorane.Its structure has been characterized by elementalanalysis, n.m.r.spectra and mass spectrum.The compound reacted with phenylisothiocyanate togive 2-phenyliminothiazolid-5-one

Select

INTRAMOLECULAR β-CARBOXYLIC ACTIVATING OF N-PHOSPHORYL ASPARTIC ACID

Yan Mei LI, De Qing ZHANG, Hong Wei ZHANG, Gai Jiao JI, Yu Fen

中国化学快报. 1992, 3(05): 343-346.

摘要 ( )

可视化

The β-carboxylic group plays an important role inthe peptide formation, esterification and the ester exchangeat the phosphoryl group of N-phosphorylated aspartic acid

Select

STUDIES ON THE SYNTHESES AND BACTERICIDAL ACTIVITIES OF ACYLAMINOETHYL GLYCINES AND OF THEIR CYCLO-CONDENSATION PRODUCTS

Ming Li SHI, Rong Jun QU

中国化学快报. 1992, 3(05): 347-348.

摘要 ( )

可视化

Two series of new compounds:the aliphatic acylaminoethyl glycines (Ⅰ) and their cyclo-condensationproducts-allphatic acylaminoethyl plperazlnones (Ⅱ) were synthesized.The results of bactericidal and bacteriostatictests show that the two series of compounds are good bactericldal agents

Select

SYNIHESIS AND SURFACE ACTIVE PROPERTIES OF OXYETHYLENATED FATTY ALCOHOL 2-HYDROXYPROPYL SULFONATES

Guang You ZHANG, Shao Fen LU, Ming Li SHI

中国化学快报. 1992, 3(05): 349-350.

摘要 ( )

可视化

Synthesis and surface active properties of the oxyethylenated fatty alcohol 2-hydroxypropyl sulfonates wereinvestigated.Of all surface active compounds studied, those with a 2-hydroxypropyl (HP) moiety in the moleculeare more surface-active than the corresponding compounds without

Select

CARBONYLATION OF ALLYL HALIDES CATALYZED BY POLY(N-VINYL-2-PYRROLIDONE) ANCHORED PALLADIUM CATALYST UNDER ATMOSPHERIC PRESSURE

Han Rong GAO, Yun XU, Shi Jian LIAO, Dao Rong YU

中国化学快报. 1992, 3(05): 351-354.

摘要 ( )

可视化

Carbonylation of allyl halides catalyzed by poly(N-vinyl-2-pyrro-lidone) anchored palladium catalyst affords β, r-butonic acid under atmo-spheric pressure and at room temperature.The activity and efficiency ofthe catalyst are much higher than those of the reported catalysts for thisreaction

Select

ELECTROCARBOXYLATION OF ORGANIC COMPOUNDS WITH CARBON DIOXIDE CATALYZED BY METALLOPORPHYRINS(Ⅲ)--EFFECTS OF AXIAL LIGANDS ON CATALYTIC ACTIVITY OF CoTPP

Guo Dong ZHENG, Yu Wen LIU, Qing Da AN, Xi Zhang CAO

中国化学快报. 1992, 3(05): 355-356.

摘要 ( )

可视化

The effects of peptides, amino acids and organic bases as an axial ligand on reaction ac-tivities in the electrocarboxylation of benzyl chloride with CO₂ catalyzed by CoTPP are reported.The imidazole organic base, peptide containing —SH and amino acid containing imidazolyl en-hance the catalytic activity.The effect of imidazole amounts on the catalytic activity of CoTPP isstudied

Select

ELECTROCARBOXYLATION OF ORGANIC COMPOUNDS WITH CARBON DIOXIDE CATALYTZED BY METALLOPORPHYRINS(Ⅳ)--EFFECT OF VARIOUS FACTORS ON ELECTROCARBOXYLATION

Guo Dong ZHENG, Qing DING, Qing Da AN, Xi Zhang CAO

中国化学快报. 1992, 3(05): 357-358.

摘要 ( )

可视化

The effects of various factors on the electrocarboxylation of organic compounds withcarbon dioxide catalyzed by metalloporphyrin are studied.The optimal potential of electrocar-boxylation is-1.6 V(vs.SCE).A weak protic solvent methanol can enhance catalytic activity.Tetrabutylammonium iodide is the best one of five electrolytes.The yields and current efficienciesof electrocarboxylation are increased slowly as the concentration of catalyst increases

Select

SYNTHESIS OF FUNCTIONAL UNSATURATED POLYESTER BY USING RARE EARTH CATALYSTS 2.TERPOLYMERIZATION OF EPICHLOROHYDRINMALEIC ANHYDRIDE-CARBON DIOXIDE WITH Y(P₂₀₄)₃-Al(i-Bu)₃

Xian Hai CHEN, Yi Feng ZHANG, Zhi Quan SHEN

中国化学快报. 1992, 3(05): 359-360.

摘要 ( )

可视化

Teroolymerization of enichlorohydrin(ECH)-maleic anhydride(MAn)-carbon dioxide(CO₂) was carried out by using Y(P₂₀₄)₃-Al(i-Bu)₃ as catalyst for the first time.The terpolymersobtained were characterized by IR and 1H-NMR.It was foundthat the composition of the teroolymer was influenced by theaddition mode, initial monomer charge ratio, etc

Select

CHEMISTRY OF DENUDATINE.Ⅳ.AN UNUSUAL REARRANGEMENT BY CONTRACTION OF RING C IN DENUDATINE AND DIACETYLDENUDATINE

Feng Peng WANG, Jian Zhong WANG, Rong Zhang

中国化学快报. 1992, 3(05): 361-362.

摘要 ( )

可视化

An unusual rearrangement by contraction of the ring C in denudatine 1 and di-acetyldenudatine 2 is presented

Select

AROMATIC BOND INCLUDING METALLIC ATOM IN COORDINATE COMPOUNDS AND SOME OF ITS PROPERTIES

Jing Jiang LIU, Yun Ti CHEN, R. Kent MURMANN

中国化学快报. 1992, 3(05): 363-366.

摘要 ( )

可视化

Aromatic bond including metallic atom (Ni) is investigated byEHMO calculation.The NMR spectra and the mechanism for hydrolysis arediscussed on the ground of results of computation

Select

AB INITIO STUDIES ON THE REACTION MECHANISH OF CYCLOADDITION OF KETENE AND FORMALDEHYDE

De Cai FANG, Xiao Yuan FU

中国化学快报. 1992, 3(05): 367-368.

摘要 ( )

可视化

The cycloaddition reaction of ketene and formaldehyde, lesding to 2-oxetanone, has been studied theoretically by means of RHF/3-21G.This reactionis believed to be nonsynchronous but concerted, taking place through a twistedfour membered ring transition state.Two types of frontier orbitalinteractions are involved in this reaction.The activation barrier iscalculated to be 123.1KJ/mol (MP2/3-21G result)

Select

SYNTHESIS OF LIQUID CRYSTALLINE ALKYLOXY BIPHENYL METHACRYLATES

Jing Lin, Min Lin, Hai Shui Huang

中国化学快报. 1992, 3(05): 369-372.

摘要 ( )

可视化

The synthesis and liquid crystalline behaviour of a series ofalkyloxy biphenyls were described.These includes 4-alkyloxy-4-hydroxy biphenyls, p-alkyloxy biphenyl meth acrylytes, and thepolymer of p-ethoxy biphenyl meth acrylate (PEBPMA).The effectsof reaction conditions on the yields of products were investigated.Theliquid crystalline behaviour of the products was characterized by DSC, polarizing microscopy..It was found that the PEBPMA showedsmectic phase

Select

CALORIMETRIC AND RAMAN SPECTROSCOPIC STUDIES ON THE INTERACTION OF LANTHANOID IONS WITH DIPALMITOYLPHOSPHATIDYLCHOLINE BILAYER

Wei WANG, Lai Ning LI, Shi Quan XI

中国化学快报. 1992, 3(05): 373-374.

摘要 ( )

可视化

The interactions of lanthanoid ions with dipalmitoylphosphatidylcholine bilayer werestudied by DSC and Raman spectroscopy.The results show that the addition of lanthanoid ionscauses a considerable increase of the gel to liquid crystalline transition temperature ofphospholipid and a reduction of order of lateral packing and conformation of acyl chains in SUVs

Select

VIBRATIONAL SPECTROSCOPIC STUDY OF THE INTERACTION BETWEEN Ge-132 AND DIPALMITOYLPHOSPHATIDYLCHOL INE

Wei WANG, Lai Ming LI, Shi Quan XI

中国化学快报. 1992, 3(05): 375-376.

摘要 ( )

可视化

The vibrational spectra of both pure DPPC liposomes and DPPC multilayers reconstituted with Ge-132are reported as a function of temperature from 290 to 330K.The results show that the addition of Ge-132results in suppression of the pretransition behavior and reduction of temperature of the main transition forreconstituted system.The results also show that the degree of rigidity of the acyl chain in the presence ofGe-132 is lower than that in pure DPPC dispersion within the investigated temperature range

Select

SYNTHESIS AND STRUCTTURE OF LB FILMS OF A NOVEL AMPHIPHILIC PORPHYRIN

Yi LUO, Xuan Jie WU, Zhang Ping CHFN, Zhong Xing JING

中国化学快报. 1992, 3(05): 377-378.

摘要 ( )

可视化

A novel amphiphilic porphyrin(Ⅰ) containing a long chain wassynthesized and its monolayer was prepared.The structure of LB films werecharacterized by SHG (Second Harmonic Generation) and STM (ScanningTunnelling Microscope)

Select

LASER FLASH SPECTROSCOPY STUDIES OF PYRENE EXCIMER IN ACETONITRILE

Ji Liang SHI, Yuan Chao ZHANG, Jia Liang GU, Fang Lin LI, Xi Kui JIANG, Nai Guang WANG, Jun De CHEN

中国化学快报. 1992, 3(05): 379-382.

摘要 ( )

可视化

Formation and decay processes of pyrene excimer in acetonitrilehave been measured by laser flash spectroscopy at 475nm, and thedependence of λ₁+λ₂ on the pyrene concentration has also been measured at290^°K.On the basis of these measurements, six rate parameters whichdescribe the behaviour of pyrene excimer system in acetonitrile solutionhave been evaluated.At 355 nm laser light irradiation, the ΔG of thepyrene excimer formation in acetonitrile is evaluated to be-30.18kJ/mol.This value is quite different from the corresponding ΔG in cyclohexane(-16.72kJ/mol)

Select

LASER FLASH SPECTROSCOPY STUDIES OF THE ANTHRACENEN, N-DIETHYLANILINE EXCIPLEX FORMATION IN γ-CYCLODEXTRIN

Ji Liang SHI, Yuan Chao ZHANG, Jia Liang GU, Fang Lin LI, Xi Kui JIAN, Nai Guang WANG, Jun De CHEN

中国化学快报. 1992, 3(05): 383-386.

摘要 ( )

可视化

Gamma-cyclodextrin (γ-CD) was used to induce the formationof N, N-diethylaniline (DEA) exciplex in 15:85(φ=0.15)v/v EtOH-H₂Obinary mixture.Measurements of the fluorescence spectra of anthracene inthe presence or absence of DEA and γ-CD show that γ-CD can form 1:1:1 host/guest-Ⅰ/guest-Ⅱ inclusion complex with anthracene and DEA

Select

ADSORPTIVE VOLTAMMTRIC DETERMINATION OF COPPER, NICKEL, COBALT AND CADMIUM WITH 2-QADN2, 7

Zheng Qi ZHANG, Xiao Li LIU, Hong ZHANG

中国化学快报. 1992, 3(05): 387-388.

摘要 ( )

可视化

A new reagent 2-QADN2, 7 has been synthesized and its electroana-lytical characteristics have been studied.The procedure of the adsorptivevoltammetric determination of copper, nickel, cohalt and cadmium was workedout

Select

DIFFERENTIAL RECIPROCAL OSCILLOGRAPHIC CHRONOPOTENTIOMETIC TITRATION

Jian Bin ZHENG, Shu Ping BI, Hong GAO

中国化学快报. 1992, 3(05): 389-392.

摘要 ( )

可视化

A new method called differential reciprocal oscillographic chronopotentiometrictitration is presented.It makes use of appearance or disappearance of a peak of depolarizer ondifferential reciprocal oscillogram indicating the end point of titration.This method was appliedto titration of Pb²⁺, Cd²⁺, Ni²⁺, Co³⁺, Zn²⁺, Ga³⁺ and Cu²⁺by EDTA or EGTA.The end point oftitration is very easy to observe and the sensibility of the method is higher than that ofdiffcrcntial oscillographic chronopotcntiometric titration

Select

MM CALCULATIONS OF THE METAL-PROTEIN MODEL COMPLEXESⅠ.MOLECULAR FORCE FIELD FOR COBALT COMPEXES

Wei Liang CAO, Hong You GUO, Shi Lei XUE, Xin Gang Ren, Zuo Xing WangBeijing

中国化学快报. 1992, 3(05): 393-396.

摘要 ( )

可视化

Cobalt-protein complexes play an important role in biochemical processes.The structure of themodel molecule, Co(H₂O)₃SO₄(phen) has been studied by molecular mechanics.The molecular forcefield (MM2) parameters have been developed for the particular class of the complexes

Select

CRYSTAL STRUCTURE AND SHG EFFECT OF COMPLEX [Zn(POM)₂Br₂]

Song Xian LI, Zhe Ming WANG, Jian Zhong CHEN, Wen Yue SU

中国化学快报. 1992, 3(05): 397-398.

摘要 ( )

可视化

[Zn(POM)₂Br₂](POM is 3-Methyl-4-Nitropyridine-1-Oxide), C₁₂H₁₂Br₂N₄O₆Zn, Mr=533.44, triclinic, P1, a=11.450(3), b=13.027(2), c=6.605(1)Å, α=101.25(1), β=96.96(2), γ=108.06(2)^°, V=901.2(4)Å³, Z=2, D_c=1.97g·cm^-3, (MoK_α)=0.71069Å, F(000)=520, μ=58.21cm^-1, final R=0.040 for 2192 observed reflections, T=296K.The compound is amononuclear complex, containing a tetrahedrally coordinated zinc atom

Select

PREPARATIVE STUDIES ON MONODISPERSED POLYMERIC NICROPARTICLES AND LATEX-COATED PACKINGS IN ANION CHROMATOGRAPHY

Bing Lin HE, Yu Ge ZHANG, Bu Sen WANG, Jun NING

中国化学快报. 1992, 3(05): 399-400.

摘要 ( )

可视化

Monodispersed potymeric microparticles were prepared by seed-poly-merization.High performance packings were obtained for anion chromatography bycoating the surface-sutfonated partictes with quarternized latexes

Select

DISPERSION EFFECTS OF CLUSTER-DERIVED Rh ON SiO₂ OH ETHYLENE HYDROFORMYLATION

Lin HUANG, Wen Gui GUO, An Ming LII, Da Ming LI, Yi De XU

中国化学快报. 1992, 3(05): 401-402.

摘要 ( )

可视化

Over Rh₄(CO)_1z-derived Rh/SiO₂ catalyst, atmospheric hydroformylation and hydro-genation of ethylene are suggested to be structure sensitive and structure insensitive, res-pectively

Select

STUDY OF THE MAGNETIC PROPERTIES OF LaGa_1-xFe_xO₃

Jian Mei YANG, Qiang SU, Hong Yan WAHG

中国化学快报. 1992, 3(05): 403-404.

摘要 ( )

可视化

The dependence of the susceptibitity of LaGA_1-xFe_xO₃(x=0.2, 0.5, 6.8) on the concentration of Fe³⁺, teperature and magnetic fietdintensity were studied and the change of Neet point was observed.Some regularities were obtained for first time in this paper

Select

THE DETERMINATION OF ZETA POTENTIAL IN THE COLLOID α-FeOOH/NaCl aq.BY THE APPLICATION OF STIGTER-OHSHIMA THEORIES

Zhi Long SHEN, K. H. ROGhN, J. PEARGE, D. J. SHAW

中国化学快报. 1992, 3(05): 405-406.

摘要 ( )

可视化

The electrophoretic mobility of positively charged, cylindrically shaped α-FeO OHparticles dispersed in dilute sodium chloride solutions was measured at 25℃, as a function ofionic strength and pH using microelectrophoresis apparatus.The mobility data were processed through a number of selected relationships that representvarious stages of understanding of electrophoretic theory, culminating in the determination ofvalues of the electrokinetic charge and zeta potential of the colloid α-FeO OH/NaCl aq

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

1992年, 第3卷, 第05期　刊出日期：1992-05-20

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

1992年, 第3卷, 第05期 刊出日期：1992-05-20

1992年, 第3卷, 第05期　刊出日期：1992-05-20