中国化学快报

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NEW HETEROCYCLIC SYSTEMATIC SYNTHESIS V.THE SYNTHESIS AND CHARACTERISTICS OF 1,3a,5-TRISUBSTITUTED-3a,4,5,11-TETRAHYDRO-1,2,4-OXADIAZOLINO[5,4-d][1,5]BENZODIHETEROPINES

Hai Tao, Wu Sheng JIN

中国化学快报. 1993, 4(02): 95-96.

摘要 ( )

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Twenty-seven oxadiazolino[5,4-d][1,5]benzodiheteropine derivatives have been synthesized bythe 1,3-dipolar cycloaddition of benzodiheteropines with nitrile oxide 1,3-dipoles,their conformations andthe characteristics of the newly formed oxadiazoline fused on them have been studied.It has also beenfound that the mass spectra show characteristic fragmentation patterns.

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SYNTHESIS AND PARTIAL CHARACTERIZATION OF WATER SOLUBLE RAPE POLLEN DODECAPEPTIDE

Kai Ke WAN, Ai Xue JI, Zhong WANG Wei Guang QIU, Sheng JIN

中国化学快报. 1993, 4(02): 97-98.

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A dodecapeptide extracted from rape pollen was synthesized using solid-phase method,its conformations in different states were studied by FT-IR,CD,and its physiological activities were determined.Sevensegments and five analogs were also synthesized to elucidate the structure-function relation.

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SYNTHESIS OF 11 α-HYDROXY-AND 11β-CHLORO-ARTEMISININ

Ying Li, De Wen LU, Hui Bin ZHANG

中国化学快报. 1993, 4(02): 99-100.

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可视化

11α-Hydroxy-and 11β-chloro-artemisinin have been prepared from artemisinin

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Studies on Synthesis of Diadenylyl Sulfites

Lai Xin WANG, Li He ZHANG

中国化学快报. 1993, 4(02): 101-104.

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Diadenylyl sulfites were obtained by the condensation of protected adenosines using O,O-bis (1-ben-zotriazolyl) sulfite as a coupling reagent.

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TOTAL SYNTHESIS OF(-)-3-OXOEUDESMA-1,4,11(13)-TRIEN-7αH-12-OIC ACID

Yu Lin LI, Xin CHEN, Si Chang SHAO,Tong Shuang LI

中国化学快报. 1993, 4(02): 105-106.

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The first total synthesis of(-)-3-oxoeudesma-1,4,11(13)-trien-7αH-12-oic acid 1 has been described.The key step is one-pot reaction involving dehydrogenation and allylic oxidationwith selenium dioxide.

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A NEW METHOD FOR AROMATIZATION OF Δ⁵⁽¹⁰⁾-STEROIDAL C₃-DIMETHYL KETALS

Guang Dian HAN, Hong Yan WEN

中国化学快报. 1993, 4(02): 107-108.

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A new method for aromatization of ⁵⁽¹⁰⁾-steroidal C₃-dimethyl ketalswith pyridinium hydrobromide perbromide （PHP.Py·HBr·Br₂） to aromatic A ring steroids in high yield （90-95%） is described.

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STUDY ON THE ADDITION REACTION OF 1-IODO-4-CHLOROPERFLOROBUTANE TO 1-HEXENE UNDER REDUCTIVE CONDITIONS

Chang Ming HU, Jian CHEN

中国化学快报. 1993, 4(02): 109-110.

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Promoted by various reductants,the addition of 1-iodo-4-chloro-perfluorobutane to 1-hexene giving 1:1 adduct is reported.Based on these facts,several new redox systems are proposed.

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STUDIES On THE SOLID-STATE PHOTOCHEMICAL RFACTIONS OF ANTIPYRINE WITH AROMATIC ALDEHYDE

Ji Ben MENG, Guo Qiang XIONG, Yong Mei WANG

中国化学快报. 1993, 4(02): 111-114.

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Solid state photochemical reactions of antipyrine with 5-formyl-1,3-dimethyluracil,p-nitrobenzaldehyde and p-hydroxybenzaldehyde have been described.The structuresof 4 hey compounds obtained were determined by IR,UV,¹HNHR,ns and elemental analysis.

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SOLID STATE PHOTOREACTION OF N-HETERO-CYCLIC COMPOUNDS

Ji Ben MENG, Wen Guang WANG, Yong Mei WANG, Hong Gen WANG

中国化学快报. 1993, 4(02): 115-118.

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可视化

Photochemical reactions of 3-methylindole,carbazole,benzimidazole with fusedpolycyclic aromatic hydrocarbons in solid state were investigated,The structures of 4 newcompounds were confirmed by IR,UV,¹HNNR,MS and elemental analysis.The structure of compounds 3.6 was established by X-ray crystallography.

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A HIGHLY EFFICIENT SYNTHESIS OF(5,10,15,20-TETRAPHENYLPORPHYRINATO) GALLIUM(Ⅲ) ACETATE

Feng Li YANG, Ping LI, Xiang Qin LIN, Er Kang WANG

中国化学快报. 1993, 4(02): 119-120.

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可视化

(TPP)OAc was obtained by refluxing Ga₂O₃ and the free base TPPH₂ in acetic acid containing sodium acetate in a yield of 65%.

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A LOW-PRESSURE AND ONE-STEP METHOD FOR THE SYNTHESIS OF ALKYLIDYNETRICOBALT NONACARBONYL CLUSTERS:RCCo₈（CO）₉

Cheng Guo JIA, Yun Pu WANG, Han Yu FENG

中国化学快报. 1993, 4(02): 121-122.

摘要 ( )

可视化

Metal clusters RCCo_a（CO）₉（R-H,C1,Br,CH_a,Ph） were preparedin 18.8-57.3% yields from the reaction of cobalt(Ⅱ)salt and RCX_a under mild PTC conditions(latm CO,25℃).The cobalt salt was reducedto Co（CO）₄ in the presence of Na_aS₂O₄.

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SYNTHESIS AND STRUCTURE OF Cu(Ⅱ) COMPLEXES BY OXIDATIVE ADDITION OF DIBENZOYL PEROXIDE ON METALLIC COPPER

Rui Na, YANG Dong, Mei WANG, Dou Man JIN

中国化学快报. 1993, 4(02): 123-124.

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可视化

Dibenzoyl peroxide undergoes oxidative addition on metallic copper powder with 2,2'-bipyridine(or imidazole)in a mixed solvent（methanol and tetrahydrofuran）,and affords the Cu(Ⅱ) complexes-[Cu(C₆H₅COO)₂（2,2’-bipy）]H₂O(1) and [Cu(C₆H₅COO)₂(C_aH₄N₂)₂ ](2).The structure was solved by direct methodsand Fourier synthesis.C₂₄H₂₀N₂O₅Cu (1),Mr=479.78,space group P2(1)/c,a=6.986(7),b=18.833(I),c=17.021(3)Å,α=γ=90°,Z=4,V=2218.Å³,Dc=1.443g/cm³,R=0.055Rw=0.062.Complex(2),C₂₀H₁₈N₄O₄Cu(2),Mr=441.74,space group P2（1）/n,a=8.699(4),b=9.840(6),c=12.399Å(5),α=γ=90°,β=100.8°,Z=4,V=1010.9Å³,Dc=1.654g/cm^a,R=0.055,Rw=0.062.

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SYNTHESIS AND CHARACTERIZATION OF A NEW THERMOTROPIC LIQUID CRYSTALLINE POLYESTER-ETHER SULFONE

Yu Shan NI, Yun Hui WANG, Guang LI, Xiao Ming JIN, Meng Xian DING

中国化学快报. 1993, 4(02): 125-128.

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A new aromatic thermotropic liquid crystalline polyester-ether sulfone(PEES) was prepared from 4,4-bis(4-hydroxyphenoxy)diphenyl sulfone(BHPDS),terephthalic acid(TPA)and p-hydroxybenzoic acid(P-HBA).Some factors that affected melting viscosity of polymer such as prepolymerization reaction medium and post-polymerization etc,were discussed.The liquid crystalline properties were characterized by DSC,polarizing microscope with a hot stage and WAXD measurements.

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SYNTHESIS AND CHARACTERIZATION OF THERMOTROPIC LIQUID CRYSTALLINE POLY(ESTER-IMIDE)S

Hui Yan ZHUANG, Yu Shan NI, Meng Xian DING

中国化学快报. 1993, 4(02): 129-132.

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A new series of thermotropic liquid crystalline poly(ester-imide)s were synthesized via a solution polycondensation process.The polymers were also characterized by IR,DSC,polarizing microscopy and WAXD measurements.

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THE STRUCTURES OF YIYELIANGWANOSIDE Ⅶ AND Ⅷ FROM THE BARK OF NOTHOPANAX DA VIDⅡ(FRANCH)HARMS

Shi Shan YU, De Quan YU, Xiao Tian LIANG

中国化学快报. 1993, 4(02): 133-136.

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可视化

Two new oleanane type saponins wereisolated from the alcoholic extract of the bark of Nothopanax davidii(Franch) Harms(Araliaceae).Their structures have been determined on th e basis of spectral and chemical data as 3-O-β-(2',4'-O-diacetyl)-D-xylopyranosyl-3β-hydroxyolean-12-ene-28,29-dioicacid-28-O-[α-L-rhamnopyranosyl(1-4)-β-D-glucopyranosyl(1-6)-β-D-glucopyranosyl] ester(1),named yiyeliangwanoside VII;3-O-β-(3'-O-acetyl)-D-xylopyranosyl-3β-hydroxyolean-12-ene-28,29-dioic acid-28-O-[α-L-rhamnopyranosyl(1-4)-β-D-glucopyranosyl(1-6)-β-D-glucopyranosyl] ester(Ⅱ),named yiyeliangwanoside Ⅷ.

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TWO MINOR SPIROSTANOL GLYCOSIDES FROM SMILAX MENISPERMOIDE

Yong JU, Zhong Jian JIA, Hai Ruo PENG, Xue Jun SUN

中国化学快报. 1993, 4(02): 137-138.

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可视化

Two minor steroidal saponins were isolated from the roots of Smilax menispermoidea.One of them is new and its structure was established as(25S) spirost-5-en-3β,17α,27-triol-3-O-[α-L-rhamnopyranosyl(1-4)]-β-D-gluco-pyranoside using spectroscopic and chemical methods.

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ISOLATION AND STRUCTURES OF FOUR CYCLODIPEPTIDES

Jing Yu SU, Yong Li ZHONG, Long Mei ,Wei SHEN, Qi Wen WANG

中国化学快报. 1993, 4(02): 139-140.

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可视化

Three novel interesting polychlorinated cyclodipeptides,designated dyssmide A(1),B(2),C(3)and a known compound,2,3-dihydrodyeamide C(4) were isolated from the sponge Dysidea sp.Their structures were elucidated by spectroscopic methods.

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STUDIES ON TWO NEW FUROSTANOL GLYCOSIDES FROM ALLIUM MACROSTEMON BUNGE

Jun Peng PENG, Xuan WANG, Xin Sheng YAO

中国化学快报. 1993, 4(02): 141-144.

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可视化

Two new furostanol saponins,named macrostemonoside E(1) and F(2), were isolated from the bulbs of Allium macrostemon Bunge (Liliaceae),their structures were established oy spectroscopic analysis and chemical evidences.Both possessed strong inhibitory activity on human platelet aggregation.

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1-NITROAKNADININE,A NOVEL NITRO-HASUBANAN ALKALOID FROM STEPHANIA SUTCHUEN ENSIS

Yu Rui ZHAO, Tong Fang ZHAO, Sheng LAI, Xian Kai WANG

中国化学快报. 1993, 4(02): 145-148.

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可视化

A novel hasubanan alkaloid has been isolated along with the known aknadinine from the fresh roots of Stephania sutchenensis.Its structure has been established as 1-nitroaknadinine from detailed spectral studies and confirmed by chemical correlation with aknadinine.The novel alkaloid is the first nitro-hasubanan and also the first example of naturally occurring nitro-alkaloids.

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FULLERENE GEOMETRY PREDICTION WITH MOLECULAR MECHANICS CALCULATIONS

Ming Dan CHEN

中国化学快报. 1993, 4(02): 149-152.

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可视化

A serial of fullerenes had been built and the optimized geometries had been obtained with the energy minimization of molecular mechanics calculations according to the fact that the pentagonal number is exactly 12 in the fullerenes which consist of pentagons and hexagons.The fullerene geometry prediction could facilitate further theoretical and synthetical studies in the near future.

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A Study of Metal Ions Packing Hydrated Layer of Inclusion Crystals

Wen Sheng GUO, Yang LU, Shu Chun WANG, Qi Tai ZHENG, Tie Jin LI

中国化学快报. 1993, 4(02): 153-156.

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可视化

The inclusion crystal formed by the hexamethylenamine with p-nitrophenol has a layer type structure,and is divided organic layer and inorganic layer,the latter has a width of 1.0136nm.Metal ions can enter hydrated layer of the crystal,the contents of the cations and water in the crystal are determined.The XRD analysis of the layer type structure of the crystal is also given.

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SPECTROPHOTOMETRIC ANALYSIS OF MIXTURES OF TRACE METAL BY DOUBLE-SYSTEM AND MULTIVARIATE CALIRRATION

Yong Nian NI, Xin Ming YIN

中国化学快报. 1993, 4(02): 157-158.

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In this paper,a new method for simultaneous spectrophotometric analysis of multicomponent with double-system was developed.The multivariate calibration method,principal component analysis-partial least squares(PCA-PLS),was described and applied to the processing of measurement data.A demonstration,simultaneous determination of cobalt,nickel,copper,zinc and iron with double-system(5-Br-PADAP and PAR as chromogenic chelate reagents,respectively) was given.The results showed that the method with douhle-system gave better precision than those with single system and MLR(in this paper,AKC method was selected)did not give satisfied precision in any situation.

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AN INVESTIGATION ON THE MECHANISM OF SUPERCONDUCTIVITY IN ALKALI-DOPED BUCKMINSTERFULLERENE A₃C₆₀（A=K,Rb,Cs）

Ji Min YAN

中国化学快报. 1993, 4(02): 159-162.

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For the superconductors(Rb_xK₁_-x)₃C₆₀（x=0.1）,according to BCS theory and assuming that the virtual phonon acting on electron-pair is corresponding to the intrasolecular vibration in the bnckminnterfullerene C₆₀,a linear relationship of the superconducting transition temperature T_c with x has been derived,which is in agreement with the experimentals,

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SULFONATED POLYPHENYLENE-SULFIDE AS LI GANDS IN RH-COMPLEXES CATALYZED HYDROFORMYLATION

You Zhu YUAN, Hong Tu ZHANG, Hong Bin ZHAHG, and K. R. TSAI

中国化学快报. 1993, 4(02): 163-166.

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Sulfonated polyphenylene-sulfide（SPPS）was used as ligands in place of phosphine in Rh-complexes to yield a water-soluble catalyst for hydroformylation of higher olefins in two phasic system.The decreasing catalytic activities and increasing n/b ratios（normal to branch aldehyde ratios）have been found respectively with increasing molar ratios of SPPS to rhodium,and with lowering of reaction temperature,indicating more or less coordinations between thioether sulfides and Rh species in SPPS-Rh compounds,The coordinations were also evidenced by a weak Reman hand observation of the SPPS-Rh compounds at 264 cm^-1.

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PROMOTING EFFECT OF TiO_X OVERLAYER ON THE DISSOCIATION OF CO ON Fe(110)

Jun Zhuo DENG, Hong Li WANG

中国化学快报. 1993, 4(02): 167-170.

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The adsorption of CO on Fe(110)with different coverages of titania has been studied by AES,XPS,UPS.It is proposed that the adsorption sites of CO in this system are not only blocked by the deposited TiO_X,but also by the products of the dissociation of CO which is promoted by the deposited TiO_X.

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A POST-SCF STUDY ON THE EXCITED STATES OF MgH₂

Jie YANG, Guo Sen YAN, An Min TIAN

中国化学快报. 1993, 4(02): 171-174.

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The calculations on the ground state _x^~ ¹∑⁺_g and two excited states Ã³B₂, _B^~ ¹B₂ of MgH₂ system are carried out by using SOCI (Second Order Configuration Interaction)method^[1]. For each state,the electronic structure and related properties are investigated,The vibration and localization analyses are also performed.The reasonable explanations of bending geometries for the excited states are given.

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AN SCF-CI STUDY OF HIGHLY EXCITED VIBRATIONAL STATES OF BENT TRIATOMIC MOLECULES AND ITS APPLICATION TO O

Dai Qian XIE, Guo Sen YAN, Jun Kai XIE, An Min TIAN

中国化学快报. 1993, 4(02): 175-178.

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A self-consistent-field-configuration interaction（SCF-CI）procedure of studying highly excited vibrational states of bent triatomic molecules is suggested and its application to O₃ is investigated.

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STUDY OF CALCIUM ION-SELECTIVE ELECTRODE BASED ON A NEW NEUTRAL CARRIER

Wei XU, Bin GUO, You Rong NIE, Zai Fu HUANG

中国化学快报. 1993, 4(02): 179-180.

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A calcium ion-setective eletrode based on a new neutral carrier was studied.The electrode gives a Nernstian response in the rang 5.9-1 Pa and the response is stable in a wide pH range.Logarithms of setectivity coefficents are -2.3 Li(+),-3.5 Na(+),-4.0 K(+),-3.7NH₄(+),-4.5 Mg(2+) and-4.4 Zn(2+).

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COMPLEX OF MESO-TETRA-(1-NAPHTHYL)TETRABENZOPORPHYRIN WITH HOLMIUM ACETYLACETONATE

Guo Fa LIU, Yuan Hai YAO, Lian Xiang YU, Xi Zhang CAO

中国化学快报. 1993, 4(02): 181-182.

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可视化

Complex of meso-tetra-(1-naphthyl) tetrabenzo-porphyrin with holmium acetylacetonate,Ho(TNTBP)acac(TNTBP:meso-tetra-(1-naphthyl) tetrabenzoporphyrin.Hacac:acetylacetone) have been prepared and characterized by elemental analyses,ultra-violet visible spectra and infrared spectra.

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TIME RESOLVED SPECTRA OF Eu(MBA)₃ PHEN COMPLEXES

Lin Pei JIN, Ming Zhao WANG, Rui Fen WANG, Jian Xin CHEN, Guang Zhi XU

中国化学快报. 1993, 4(02): 183-186.

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Time-resolved fluorescence spectra of europium methylbenzoates（MBA）with 1,10-phenanthroline（phen）have been measured at room temperature.For each of the europium chelates,where the ligand triple states lie above the ⁵D₁ level of Eu^3-,the spectra providc evidence that the Eu^3- ⁵D⁰ state is populated by nonradiative energy transfer from the higher-lying ⁵D₁state.The relaxation time for energy decay from ⁵D₁ state is measured in the microcrystals to bc of the order of a few microseconds.It is suggested that the ligand C=0 and C=C stretching vibrations and Eu-O vibrations,chclate ring and benzene ring vibrations make important contributions to the relaxation process.The ⁵D₁-⁵D₀ relaxation time of Eu(p-MBA)₃phen is shorter than those of Eu(m-MBA)₃phen and Eu(o-MBA)₃phen since nonradiative degradation to ⁵D₀ from ⁵D₁ appears to be more strongly influenced by the E_u³⁺ sites in the former.

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DYNAMIC NMR STUDIES ON [Li（2D）][Nd（η³-C₃H₅）₄]

Feng Fu LI, Xi Tian ZHANG, Ying Tai JIN, Feng Kui PEI

中国化学快报. 1993, 4(02): 187-188.

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可视化

The dynamic ¹H and ^1aC-NMR studies on [Li（2D）][Nd(η^a-C₃H₅)₄]（D=dioxane）were reported The four allyls coordinated to Hd⁸⁺ ion are equivalent and hydrogens appear as three groups in ¹H-NMR spectra with their chemical shifts changing with temperature.C₁ and Ca are equivalent showing the characteristic of η²-allyl.The paramagnetic shifts of carbons in allyls induced by Nd²⁺ ere separated sucessfully.C₁ and C₃ located on the zero-dipolar cone.The content of contact shift is greater than that of dipolar slift to Co.

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1993年, 第4卷, 第02期　刊出日期：1993-02-20

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1993年, 第4卷, 第02期 刊出日期：1993-02-20

1993年, 第4卷, 第02期　刊出日期：1993-02-20