中国化学快报

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POLAR SUBSTITUENT EFFECTS OF ORGANOPHOSPHORUS ESTERS IN STRUCTURE-REACTIVITY STUDIES

Wen Xiang HU, Cheng Ye YUAN, Shu Sen LI

中国化学快报. 1992, 3(08): 579-582.

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In order to study the polar substituent effect almost with no steric effect in organophosphoruschemistry,a series of 4-substituted-2,6,7-trioxa-1-phosphabicyclo [2.2.2] octane 1-oxides (1) and p-substitutedphenylphosphonates (2) and corresponding mono hexyl esters (3) as model were synthesized.³¹P-NMR chemicalshifts of compounds (1) in methanol and deuterioacetone were determined.The Δδ values reflect 4-sbstituent po-lar effect.The ³¹P-NMR of compounds (2) and (3) and the pKa of compounds (3) were also measured.The results showed that the trend of polar effects of substituents in both carboxylic and organophosphates chemistry are similar.and the change of polar effects in variation with the alkyl groups is not significant.

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A CONVENIENT SYNTHESIS OF FLUORINE-CONTAINING QUINOLINES

Wei Yuan HUANG, Yan Song LIU, LIU Long Lü

中国化学快报. 1992, 3(08): 583-584.

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2-Fluoroalkyl-4-hydroxy-quinolines were easily obtained from thereactions of 2-(F-alkyl) acetates with aromatic amines in the presence of Et₃N,followed by cyclization of the intermediates with PPA.

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OXIDATION OF α-METHYL OR α-METHYLENE GROUPS IN CARBONYL COMPOUNDS WITH AMMONIUM CHLOROCHROMATE

Liang Xian LIU, Mi Feng CHEN, Kun CAI

中国化学快报. 1992, 3(08): 585-588.

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This paper reports a new method for oxidizing the α-methyl or α-methylene groups in carbonyl compounds into 1,2-dicarbonyl compoundsby ammonium chlorochromate (ACC).

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STUDISS ON HETERO-MACROCYULIC POLYETHER (Ⅲ).THE SYNTHESES OF 10-TELLURABENZO-15-CROWN-5 AND ITS PLATINUM COMPLEX AS WELL AS ITS CATALYTIC BEHAVIOR IN HYDROSILYLATION

Xiu Fang LTU, Wei Fing LI, Xue Ran LU, Han Sheng XU

中国化学快报. 1992, 3(08): 589-592.

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The syntheses of a new type of heteromacrocyclic polyether-2,3-benzo-1,4,7,13-tetraoxa-10-telluracyclopentadeca-2-ene (L),and its pla-tinum complex (PtL₂Cl₂) were described.The catalytic activity of this complex for the hydrosilylation of olefins by triethoxysilane was investigated.

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A NEW CONVENIENT SYNTHESIS OF S-ALKYL N,N-DIALKYL THIOPHOSPHORAMIDIC ACID DERIVATIVES

Chu Chi TANG, Gui Ping WU

中国化学快报. 1992, 3(08): 593-594.

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The chlorination of O,O-dialkyl N,N-dialkyl thiophosphoramidates with phosphorus oxychloride proceeds with isomerization to give S-alkyl N,N-dialkyl thiophosphoramidochloridates,which react further with various nucleophiles in the presence of base to give the title compounds.

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SELECTIVE INDIRECTIVE ELECTROOXIDATION OF THE SIDE CHAIN OF AROMATIC COMPOUNDS

Song Lin ZHANG, Gui Lan WANG, Zhi Hong LI, Kun CAI

中国化学快报. 1992, 3(08): 595-596.

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This paper describes the indirect electrooxidation of the side chain of aromatic com. pounds with a Ce(Ⅳ)/Ce(Ⅲ) redox system.The reaction has the following advantages:favourable selectivity,high yield,nonpollution and economy.

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SYNTHESIS OF DERIVATIVES OF 3-β-D-XYLOPYRANOSYL-1,2,4-OXADIAZOLES

Ling Jiao DONG, Li LI, Ling Tai MA, Li He ZHANG

中国化学快报. 1992, 3(08): 597-600.

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The synthesis of derivatives of 3-β-D-xylopyranosyl-1,2,4-oxadiazoles is accomplished by condensing protected β-D-xylopyranosyl amidoxime with acid anhydrides or various substituted benzoyl chlorides in good yield.The structures of now derivatives were identified by spectra and elemental analysis. The stability of 1,2,4-oxadiazole ring and mechanism of cyclization were investigated.

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THE CONDENSATION REACTION OF BIS (PERFLUOROALKANESULFONYL) METHANES WITH AROMATIC ALDEHYDES

Shi Zheng ZHU

中国化学快报. 1992, 3(08): 601-604.

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The ccndensation reactions occurred when heating bis (perfluoroalkane-sulfonyl) methanes with aromatic aldehydes in acetic acid anhydride and gave high yields of 1-aryl-2,2-di (perfluoroalkanesulfonyl) ethylenes.

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A NEW SYNTHETIC APPROACH TO PHOSPHONOPEPTIDE WITH PHOSPHONAMIDE MOIETY

Cheng Ye YUAN, Guo Hong WANG

中国化学快报. 1992, 3(08): 605-606.

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A novel tricomponental condensation leading to p-nitrophenyl-ethyl hydrogen substituted benzylphosphonates was described.The use of these compounds for the synthesis of phosphonopeptide with phosphonamide moiety was demonstrated.

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STUDIES ON STEREOSELECTIVE SYNTHESIS OF 4R,6R,4-ACETOXY-6-PENTYLVALEROLACTONE

Li Bing YU, Zhi Qin WANG

中国化学快报. 1992, 3(08): 607-610.

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The title compound 1b has been synthesized from the chiralbuilding block 2 through five steps.

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NEW METHOD FOR GENERATION OF t-BUTYL PERFLUOROALKYL NITROXIDES

Cheng Xue ZHAO, Yan Ling QU, Yi Yuan PENG

中国化学快报. 1992, 3(08): 611-612.

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Electron transfer reactions between O-benzoyl t-butylhydroxyl-amine,t-BuNHOCOPh (1) and perfluorodiacyl peroxides (RfCO₂)₂ (2) mayserve as a novel method for generating useful t-hutyl perfluoroalkylnitroxldes at room temperature in CFCl₂-CF₂Cl.

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BENZYL HALIDE:A CATALYST AND CO-REACTANT IN THE REACTION OF BENZYL ALCOHOL AND ETHANOL BY MICROWAVE IRRADIATION

Yun Cheng YUAN, Yu Lin JIANG, Da Bin GAO

中国化学快报. 1992, 3(08): 613-614.

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The reaction of benzyl alcohol and ethanol cannot take place with quaternary ammonium salt,but will be carried out smoothly if benzyl halide is added.

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STUDY ON POLYMERIZATION OF OILLESS ALKYD RESIN WITH PHENYLTRIETHOXYSILANE

Shi Tai WANG, Qing Si ZHANG, Wan Yong MA

中国化学快报. 1992, 3(08): 615-618.

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Oilless alkyd resin modified with the silicoorganic compounds has been obtained successfully by polymerization.At appropriate proportion of silicoorganic compounds,the polymerized product has higher hardness and lustre than that of oilless alkyd resin.

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STUDY ON THE SYNTHESIS AND PROPERTIES OF MACRORETICULAR IPN POLYACRYLAMIDE-POLY (VINYL-ETHYLENEDIAMINE) CHELATE SORBENTS

Yan Feng LI, Ren Xi ZHUO

中国化学快报. 1992, 3(08): 619-620.

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A new series of MR-IPN polyacrylamide-poly (vinyl-ethylenediamine) chelate sorbents were prepared by the reaction of ethylenediamine with MR-IPN matrixes.The new chelate sorbent showed good sorption properties for auric and platinic ions.

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SYNTHESIS AND PROPERTIES OF SEGMENTED POLYETHERURETHANES WITH ION-CONTAINING EXTENDERS

Hui Ying CHEN, Chen De MAO, Shi Qing FENG, Lin GUO, Di QIANG, Xiao Ming XIE, Yi ZHU

中国化学快报. 1992, 3(08): 621-624.

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Ion-containing segmented polyetherurethanes with well defined structures were synthesized by using ion-containing extenders.Structure characteristics,thermal behavior and surface mobility were examined.

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INVESTIGATION OF CHEMICAL CONSTITUENT FROM CELASTRUS ANGULATUS

Yong Qiang TU

中国化学快报. 1992, 3(08): 625-628.

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Three new β-dihydroagarofuran sesquiterpene polyol esters,one alkaloid and two non-alkaloids,were isolated from the MeOH extract of seed oil of Celastrus angulatus. Their structures were elucidated on the basis of UV,IR,mass,NOE difference,¹H-NMR,¹³C-NMR and ¹H-¹³C long-range correlation spectroscopy.

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HETEROPHYLLIN-A AND B,TWO CYCLOPEPTIDES,FROM THE ROOTS OF PSEUDOSTELLARIA HETEROPHYLLA

Ning Hua TAN, Jun ZHOU, Shou Xun ZHAO, Hong Jie ZHANG, De Zu WANG, Chang Xiang CHEN, Xiao Zhu LIU

中国化学快报. 1992, 3(08): 629-632.

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Two cyclopeptides,heterophyllin A and B,have been isolated from the roots of Pseudostellaria heterophylla.Their structures were elucidated by chemical,spectroscopic,and enzymatic methods.

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DITERPENOID CONSTITUENTS OF ISODON PARVIFOLIA:STRUCTURE ELUCIDATION OF NEW DITERPENOID,PARVIFOLIN

Yue Wei GUO, Pei Yuan CHENG

中国化学快报. 1992, 3(08): 633-634.

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On the basis of chemical and spectroscopic evidence,the structure of parvifolinwas established as ent-7β,20-epoxy-kaurane-15-oxo-1α,6β,7β,11β,16α-pentaol.

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NEOLIGNANS FROM PIPER KADSURA (Ⅱ)

Ying MA, Gui Qiu HAN, Tian Yi JIANG, Xian Bin YANG

中国化学快报. 1992, 3(08): 635-636.

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Two new bicyclo[3,2,1] octanoid neolignans,named as kadsurenin I and kadsurenin J were isolated from Piper kadsura (Choiey) Ohwi.Based on the spectros-copic analysis (UV,IR,MS and NMR) and chemical derivatization,their structures were established as 7R,8R,1'R,2'S,3'R-Δ^s'-3,4,5'-trimethoxy-2'-hydroxy-1',2',3',4'-tetrahydro-4'-oxo-7.3',8.1'-neolignan and 7R,8R,1'R,2'S,3'R-Δ^s'-3,4,5'-trimethoxy-2'-acetoxy-1',2',3',4'-tetrabydro-4'-oxo-7.3',8.1'-neolignan respectively.

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A MICROCOMPUTER ANALYTIC SYSTEM FOR CRYSTAL STRUCTURE USED IN CHEMICAL LABORATORIES

Yang Lü, Bo Mu WU

中国化学快报. 1992, 3(08): 637-640.

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The program system described in this paper is a microcomputer analytic system for X-ray crystal structure used in chemical laboratories.The abbreviated name is NOMCSDP.NOMCSDP has been developed on the basis of NRCVAX and SHELXS-86.It is a software for X-ray crystal structure analysis of organic molecules,especially natural organic molecules (1-7).

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STUDY ON A NOVEL KIND OF CHEMILUMINESCENCE REACTION

Xiao Hu LU, Ming Gang LU

中国化学快报. 1992, 3(08): 641-644.

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Acidic hydrogen peroxide solution,in the presence of a certain metal cation,can react with alkaline solution and produce chemiluminescence light emission.The present paper firstly reports this novel kind of chemiluminescence reaction.The effect of some factors and metal ions on the chemiluminescence reaction has been tested and studied.

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SPECTROSCOPIC STUDIES OF SEVERAL MESO-SUBSTITUTED ZINC TETRABENZOPORPHYRINS

Ling Zhi HU, Duo Yuan WANG, Zhong Xing JIANG, Zhang Ping CHEN, Xuan Jie WU

中国化学快报. 1992, 3(08): 645-648.

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The electronic spectroscopic properties of several meso-substituted zinc tetrabenzoporphyrins (ZnTBP,ZnTMTBP,ZnTPTBP,ZnTTTBP and ZnTNTBP) have been investigated in toluene.The lifetimes determined showed that the fluorescence of these compounds decay with good double exponentials.

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INDO STUDIES ON THE ELECTRONIC STRUCTURE OF [Ln(CCl₃COO)₃·phen·C₂H₅OH]₂ (Ln=Pr,Sm)

Nan DONG, Long Guan ZHU, Nian Ci WU

中国化学快报. 1992, 3(08): 649-650.

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The electronic structure and chemical bonding of the title complexes have been studied by an unrestricted INDO program made applicable for the lanthanoid compounds.The results indicated: (1) In coordinated bonds O-Ln and N-Ln,5d orbitals of Ln have large contribution in all valence orbitals of Ln and 4f orbitals have very small contribution. (2) The covalent character and ionic character are almost equal in the chemical bond which is comparatively weak between phen,C₂H₅OH and Ln are mainly ionic with some covalent character.

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MRSDCI STUDIES OF LOW-LYING ELECTRONIC STATES OF THE N₂F⁺ MOLECULE

Zheng Li CAI, He Ming XIAO

中国化学快报. 1992, 3(08): 651-652.

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Ab initio electronic structure calculations are reported for low-lying electronic states,X ¹Σ⁺ and A ¹Π of the N₂F⁺ molecule.Geometric parameters for the ground state X ¹Σ⁺ are predicted by means of mul-tireference single and double excitation configuration interaction (MRSDCI) calculations with a double zeta plus polarization (DZ+P) basis set.Vertical excitation energy for these two electronic states is determined using MRSDCI/DZ+P calculations at the ground state equilibrium geometry.The oscillator strength for the X ¹Σ⁺→A ¹Π transition and the radiative lifetime for the A ¹Π state are calculated based on the MRSDCI wavefunctions.

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TERNARY Cu(Ⅱ) (ATP) AND HETEROAROMATIC N BASE COMPLEXES IN SOLUTION:STABILITY CONSTANTS AND ANTITUMOR MECHANISM EXPLORATION

Bin SONG, Jie ZHANG, Liang-Nian JI

中国化学快报. 1992, 3(08): 653-656.

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The stability of the complexes of four pyridine-like ligands with Cu(ATP)^2- was studied and by comparing the stability constants of the ternary complexes [Cu(ATP)L]^2- with those of the binary complexes [CuL]²⁺,a stacking interaction between the pyridine ring and the purine ring of ATP is indicated.It is possible to interpret the antitumor mechanism of[Pt(NH₃)₈ (N-het)Cl]Cl in terms of this stacking interaction.

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LANTHANIDE COMPLEXES OF ACETYLACETONATE-MESO-TETRA-(4-PYRIDYL) PORPHYRIN

Gu Fa LIU, Xi Zhang CAO

中国化学快报. 1992, 3(08): 657-658.

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New tanthanide comptexes of acetylacetonate-meso-tetra-(4-pyridyt) porphyrin (LnTpypacac,Ln=Dy,Ho,Yb,Lu,H₂Tpyp=tetra-(4-pyridyl)-porphyrin,Hacac=acetylacetone) were prepared by reaction of Ln (acac)₃·3H₂O with H₂Tpyp and were characterized by elemental analyses,ultra-viotet spectra,infrared spectra and thermal analyses.

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PREPARATION OF ELECTRICAL CONDHCTIVE MOLYBDENUM OXIDE BY THERMAL DECOMPOSITION OE HYDRAZINE-CONTAINING MOLYBDENUM SALT

Jie Da WU, Hui Zhong LIU, Sheng Qiang ZHU, Guang Rong YAN

中国化学快报. 1992, 3(08): 659-662.

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A new method of preparing electrical conductive molybdenum oxide by thermal decomposition from hydrazine-containing molybdenum salt was described.The process of the thermal decomposition of hydrazine-containing molybdemum salt was investigated by thermal analysis (TG and DTA) and the thermally decomposed product was studied by S.E.M.and chemical analysis.The result indicated that the molybdenum oxide obtained in this way was electrical conductive.

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SYNTHESIS AND CHARACTERIZATION OF A NEW THREE-ARMS-NINE-CHAINS DISCOTIC LIQUID CRYSTAL

Bo LIU, Xiang Yu ZBANG, Xiao Zhen YANG

中国化学快报. 1992, 3(08): 663-664.

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A new three-arms-nine-chains discotic molecule has been synthesized,and the aggregation structure of the compound was measured by x-ray diffraction,infrared spectra,polarizing microscope,etc.From these evidences,the new discotic liquid crystal is found to have the discotic lammelar phase.

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THE CLEAVAGE REACTION OF Mo≡Mo TRIPLE BOND.SYNTHESIS AND X-RAY CRYSTAL STRUCTURE OF [CpMo(CO)₂(N,S-C₉H₆NS)]·O=PPh₃

You Mao SHI, Shi Wei Lu, He Fu GUO, Ning Hai HU

中国化学快报. 1992, 3(08): 665-666.

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The reaction of [CpMo(CO)₂]₂ with 8,8'-diquinolyl disulphide C₉H₆NSSNC₉H₆ resulted in the cleavage of Mo≡Mo triple bond to give a new mononuclear complex CpMo(CO)₂(N,S-C₉H₆NS) which was refluxed with PPh₃ in THF to form the title complex.The crystal structure of the title complex was determined by X-ray diffraction.

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X-RAY SCATIERING STUDIES ON NYLON-1010

Zhi Shen MO, Bao Quan YANG, Xiao Fu XUE, Li Hua ZHANG

中国化学快报. 1992, 3(08): 667-668.

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The structures of Nylon-1010 with different draw ratios have been investigated by using Small-Angle X-ray Scattering (SAXS).It is shown that by using a simple geometrical construction the following structure parameters can be directly derived from the correlation function,the long period (L),the thickness of the crystal amorphous interphase (d_tr),the lamellar thickness (do),the "invariant" (Q),the specific inner surface (Os),and the electron density difference between the core of the crystallite and the amorphous matrix (η_c-η_a).

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STUDY ON SORPTION OF UREA BY MEANS OF MNTAL-POLYMER COMPLEXES

Bing Lin HE, Xiao Bing ZHAO

中国化学快报. 1992, 3(08): 669-672.

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Urea can be sorbed by complexation with metal-polyaerylic acid complex.The experimental results indicate that the coordination occurs in the 0 atom of urea with Cu(Ⅱ) in Cu(Ⅱ)-polyaerylic acid complex and the sorption capacity of urea can reach about 60 mg per gram of the Cu(Ⅱ)-polyacrylic acid complex.

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1992年, 第3卷, 第08期　刊出日期：1992-08-20

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1992年, 第3卷, 第08期 刊出日期：1992-08-20

1992年, 第3卷, 第08期　刊出日期：1992-08-20