1992 Volume 3 Issue 8

POLAR SUBSTITUENT EFFECTS OF ORGANOPHOSPHORUS ESTERS IN STRUCTURE-REACTIVITY STUDIES
Wen Xiang HU , Cheng Ye YUAN , Shu Sen LI
1992, 3(8): 579-582
[Abstract](475) [FullText HTML] [PDF 128KB](1)
Abstract:
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.
A CONVENIENT SYNTHESIS OF FLUORINE-CONTAINING QUINOLINES
Wei Yuan HUANG , Yan Song LIU , LIU Long Lü
1992, 3(8): 583-584
[Abstract](491) [FullText HTML] [PDF 74KB](7)
Abstract:
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.
OXIDATION OF α-METHYL OR α-METHYLENE GROUPS IN CARBONYL COMPOUNDS WITH AMMONIUM CHLOROCHROMATE
Liang Xian LIU , Mi Feng CHEN , Kun CAI
1992, 3(8): 585-588
[Abstract](737) [FullText HTML] [PDF 119KB](45)
Abstract:
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).
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
1992, 3(8): 589-592
[Abstract](509) [FullText HTML] [PDF 127KB](2)
Abstract:
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.
A NEW CONVENIENT SYNTHESIS OF S-ALKYL N,N-DIALKYL THIOPHOSPHORAMIDIC ACID DERIVATIVES
Chu Chi TANG , Gui Ping WU
1992, 3(8): 593-594
[Abstract](480) [FullText HTML] [PDF 89KB](3)
Abstract:
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.
SELECTIVE INDIRECTIVE ELECTROOXIDATION OF THE SIDE CHAIN OF AROMATIC COMPOUNDS
Song Lin ZHANG , Gui Lan WANG , Zhi Hong LI , Kun CAI
1992, 3(8): 595-596
[Abstract](482) [FullText HTML] [PDF 70KB](5)
Abstract:
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.
SYNTHESIS OF DERIVATIVES OF 3-β-D-XYLOPYRANOSYL-1,2,4-OXADIAZOLES
Ling Jiao DONG , Li LI , Ling Tai MA , Li He ZHANG
1992, 3(8): 597-600
[Abstract](494) [FullText HTML] [PDF 118KB](0)
Abstract:
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.
THE CONDENSATION REACTION OF BIS (PERFLUOROALKANESULFONYL) METHANES WITH AROMATIC ALDEHYDES
Shi Zheng ZHU
1992, 3(8): 601-604
[Abstract](471) [FullText HTML] [PDF 92KB](1)
Abstract:
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.
A NEW SYNTHETIC APPROACH TO PHOSPHONOPEPTIDE WITH PHOSPHONAMIDE MOIETY
Cheng Ye YUAN , Guo Hong WANG
1992, 3(8): 605-606
[Abstract](496) [FullText HTML] [PDF 81KB](0)
Abstract:
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.
STUDIES ON STEREOSELECTIVE SYNTHESIS OF 4R,6R,4-ACETOXY-6-PENTYLVALEROLACTONE
Li Bing YU , Zhi Qin WANG
1992, 3(8): 607-610
[Abstract](465) [FullText HTML] [PDF 88KB](1)
Abstract:
The title compound 1b has been synthesized from the chiralbuilding block 2 through five steps.
NEW METHOD FOR GENERATION OF t-BUTYL PERFLUOROALKYL NITROXIDES
Cheng Xue ZHAO , Yan Ling QU , Yi Yuan PENG
1992, 3(8): 611-612
[Abstract](506) [FullText HTML] [PDF 71KB](1)
Abstract:
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.
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
1992, 3(8): 613-614
[Abstract](504) [FullText HTML] [PDF 75KB](2)
Abstract:
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.
STUDY ON POLYMERIZATION OF OILLESS ALKYD RESIN WITH PHENYLTRIETHOXYSILANE
Shi Tai WANG , Qing Si ZHANG , Wan Yong MA
1992, 3(8): 615-618
[Abstract](464) [FullText HTML] [PDF 115KB](0)
Abstract:
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.
STUDY ON THE SYNTHESIS AND PROPERTIES OF MACRORETICULAR IPN POLYACRYLAMIDE-POLY (VINYL-ETHYLENEDIAMINE) CHELATE SORBENTS
Yan Feng LI , Ren Xi ZHUO
1992, 3(8): 619-620
[Abstract](477) [FullText HTML] [PDF 77KB](0)
Abstract:
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.
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
1992, 3(8): 621-624
[Abstract](468) [FullText HTML] [PDF 332KB](0)
Abstract:
Ion-containing segmented polyetherurethanes with well defined structures were synthesized by using ion-containing extenders.Structure characteristics,thermal behavior and surface mobility were examined.
INVESTIGATION OF CHEMICAL CONSTITUENT FROM CELASTRUS ANGULATUS
Yong Qiang TU
1992, 3(8): 625-628
[Abstract](469) [FullText HTML] [PDF 127KB](1)
Abstract:
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.
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
1992, 3(8): 629-632
[Abstract](562) [FullText HTML] [PDF 96KB](4)
Abstract:
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.
DITERPENOID CONSTITUENTS OF ISODON PARVIFOLIA:STRUCTURE ELUCIDATION OF NEW DITERPENOID,PARVIFOLIN
Yue Wei GUO , Pei Yuan CHENG
1992, 3(8): 633-634
[Abstract](483) [FullText HTML] [PDF 87KB](0)
Abstract:
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.
NEOLIGNANS FROM PIPER KADSURA (Ⅱ)
Ying MA , Gui Qiu HAN , Tian Yi JIANG , Xian Bin YANG
1992, 3(8): 635-636
[Abstract](507) [FullText HTML] [PDF 93KB](1)
Abstract:
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-Δs'-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-Δs'-3,4,5'-trimethoxy-2'-acetoxy-1',2',3',4'-tetrabydro-4'-oxo-7.3',8.1'-neolignan respectively.
A MICROCOMPUTER ANALYTIC SYSTEM FOR CRYSTAL STRUCTURE USED IN CHEMICAL LABORATORIES
Yang Lü , Bo Mu WU
1992, 3(8): 637-640
[Abstract](452) [FullText HTML] [PDF 120KB](0)
Abstract:
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).
STUDY ON A NOVEL KIND OF CHEMILUMINESCENCE REACTION
Xiao Hu LU , Ming Gang LU
1992, 3(8): 641-644
[Abstract](493) [FullText HTML] [PDF 108KB](0)
Abstract:
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.
SPECTROSCOPIC STUDIES OF SEVERAL MESO-SUBSTITUTED ZINC TETRABENZOPORPHYRINS
Ling Zhi HU , Duo Yuan WANG , Zhong Xing JIANG , Zhang Ping CHEN , Xuan Jie WU
1992, 3(8): 645-648
[Abstract](548) [FullText HTML] [PDF 134KB](0)
Abstract:
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.
INDO STUDIES ON THE ELECTRONIC STRUCTURE OF [Ln(CCl3COO)3·phen·C2H5OH]2 (Ln=Pr,Sm)
Nan DONG , Long Guan ZHU , Nian Ci WU
1992, 3(8): 649-650
[Abstract](522) [FullText HTML] [PDF 94KB](0)
Abstract:
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.
MRSDCI STUDIES OF LOW-LYING ELECTRONIC STATES OF THE N2F+ MOLECULE
Zheng Li CAI , He Ming XIAO
1992, 3(8): 651-652
[Abstract](470) [FullText HTML] [PDF 78KB](0)
Abstract:
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.
TERNARY Cu(Ⅱ) (ATP) AND HETEROAROMATIC N BASE COMPLEXES IN SOLUTION:STABILITY CONSTANTS AND ANTITUMOR MECHANISM EXPLORATION
Bin SONG , Jie ZHANG , Liang-Nian JI
1992, 3(8): 653-656
[Abstract](465) [FullText HTML] [PDF 164KB](2)
Abstract:
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.
LANTHANIDE COMPLEXES OF ACETYLACETONATE-MESO-TETRA-(4-PYRIDYL) PORPHYRIN
Gu Fa LIU , Xi Zhang CAO
1992, 3(8): 657-658
[Abstract](488) [FullText HTML] [PDF 60KB](0)
Abstract:
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.
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
1992, 3(8): 659-662
[Abstract](477) [FullText HTML] [PDF 208KB](1)
Abstract:
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.
SYNTHESIS AND CHARACTERIZATION OF A NEW THREE-ARMS-NINE-CHAINS DISCOTIC LIQUID CRYSTAL
Bo LIU , Xiang Yu ZBANG , Xiao Zhen YANG
1992, 3(8): 663-664
[Abstract](448) [FullText HTML] [PDF 81KB](0)
Abstract:
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.
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
1992, 3(8): 665-666
[Abstract](464) [FullText HTML] [PDF 83KB](0)
Abstract:
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.
X-RAY SCATIERING STUDIES ON NYLON-1010
Zhi Shen MO , Bao Quan YANG , Xiao Fu XUE , Li Hua ZHANG
1992, 3(8): 667-668
[Abstract](437) [FullText HTML] [PDF 92KB](0)
Abstract:
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 (dtr),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 (ηca).
STUDY ON SORPTION OF UREA BY MEANS OF MNTAL-POLYMER COMPLEXES
Bing Lin HE , Xiao Bing ZHAO
1992, 3(8): 669-672
[Abstract](442) [FullText HTML] [PDF 132KB](0)
Abstract:
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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