1993 Volume 4 Issue 1

ENANTIOSELECTIVE TOTAL SYNTHESIS OF 6R-(-)-MASSOIALACTONE
Li Bing YU , Zhi Qin WANG
1993, 4(1): 1-2
[Abstract](162) [FullText HTML] [PDF 78KB](0)
Abstract:
4'R, Z, 2-(4'-hydroxy-2'-nonenyl)-1,3-dioxane 2 which is an Intermediate in the synthesis of chiral δ-lactones,has been syntheslzedfrom dlepoxide 3. Enantioselective total synthesis of 6R-(-)-massoialactone 1 has been achieved from 2 through 4 steps
TOTAL SYNTHESIS OF N.N-BIS (β-CHLORO-β,β-DIDEUTERO-E'THYL)-N',N"-DI(CARBOETHOXYMETHYL)-PHOSPHOROTRIAMIDE
Jing Hua YANG , Lan XIE , De Pang HOU
1993, 4(1): 3-4
[Abstract](169) [FullText HTML] [PDF 85KB](0)
Abstract:
The total synthesis of the labeled componed from im mediacetic acid through esterifying, reducing with LiAID4 as a labeling agent, chlerinating and phosphorylating reactions was first reported in this paper.
STUDIES ON THE SYNTHESIS AND BIOLOGICAL ACTIVITY OF 1-ARYLOXYACETYL-4-AROYL THIOSEMICARBAZIDE DERIVATIVES
Ji Chou CHEN , Tai Bao WEI , Xiu Chun WANG , Su You YANG
1993, 4(1): 5-8
[Abstract](164) [FullText HTML] [PDF 91KB](0)
Abstract:
A series of new 1-aryloxyacetyl-4-aroylthiosemicarbazides were synthesized by means of solid-liguid phase transfer catalysis. The promoting effects of these new compounds on wheat growth were observed.
THE REACTION OF ETHYL AROYLACETATES AND o-PHENYLENEDIAMINE
Mei xiang WANG , Zhi Tang HUANG
1993, 4(1): 9-12
[Abstract](159) [FullText HTML] [PDF 132KB](0)
Abstract:
Instead of 2-(aroylmethylene)benzimidazolines 3 or 2-(aroyl-methyl)benzimidazoles 4, 4-aryl-2, 3-dihydro-1H-1, 5-benzodiazepin-2-ones 5 were obtained exclusively from the reaction of o-phenylenediamine (1) and ethyl aroylacetates 2 in the presence of a catalytic amount of potassium hydroxide.
A CONVENIENT APPROACH OF DIYNE ALCOHOL AND TRIYNE ALCOHOL BY COPPER (Ⅰ) AND PHASE TRANSFER CONDITION CATALYZED PROPARGYLATION OF PROPARGYL ALCOHOL
liang Fu HUANG , Bao Ming XU , Shu Xiang SHAN , Xue You ZHU
1993, 4(1): 13-16
[Abstract](178) [FullText HTML] [PDF 137KB](4)
Abstract:
The copper(Ⅰ) catalyzed coupling reaction of substituted propargyl tosylate with propargyl alcohol proceeds smoothly at room temperature to give 2,5-diynyl alcohol under solid-liquid phase transfer condition. A number of 2,5-diynyl alcohols and 2,5,8-triynyl alcohols were synthesized in this way in good yield.
THE INTRAMOLECULAR COUPLING REACTION OF 2-NITROETHYL-1,3-DICARBONYL COMPOUND INDUCED BY LOW-VALENT TITANIUM
Ju GAO , Jian Ping JIANG , Jian Xie CHEN , Su YUAN , Xiao Man ZHANG , Wei Xing CHEN
1993, 4(1): 17-18
[Abstract](157) [FullText HTML] [PDF 78KB](1)
Abstract:
Low-valent titanium reagent prepared in situ from TiCl4 and Zn was employed to induce the intramolecular coupling of nitro group with carbonyl group to give substituted hydroxyl pyrrolines, pyrroles and lactam in good yields.
SELF-ACTIVATING OF N-PHOSPHOAMINO ACIDS TO THE ESTER FORMATION
Yan Mei LI , Yu Fen ZHAO
1993, 4(1): 19-20
[Abstract](162) [FullText HTML] [PDF 74KB](0)
Abstract:
The introduction of phosphoryi group facilitates the esterification of an amino acid. The corresponding products were isolated and determined.
OXIDATION OF ALKYLBENZENES CATALYZED BY IRON( Ⅱ,Ⅲ)-1,10-PHENANTHROLINE AND 2, 2'-BIPYRIDINE COMPLEXES
Zi Qiang LEI , Yun Pu WANG
1993, 4(1): 21-22
[Abstract](156) [FullText HTML] [PDF 78KB](0)
Abstract:
Oxidation of alkybenzenes PhCH2R(R=H, CH3, C2H5 and n-C3H7 under 1 atm. of O2 or air catalyzed by iron(Ⅱ, Ⅲ)-2,2'-bipyridine and 1,10-phenanthroline complexes, affords the aryl-substituted ketones and alcohols with the conversion of 15.00%~34.58% containing of 97.60%~99.80% ketones and alcohols. The turnover numbers of these catalysts are over 3500 mol-cat. -1for 3.5 h.
STRUCTURES OF HAINANENSINE DERIVATIVES
Da Li YIN , Ying Hong WANG , Ji Yu GUO , Xiao Tian LIANG
1993, 4(1): 23-26
[Abstract](161) [FullText HTML] [PDF 158KB](0)
Abstract:
The structures of hainanensine derivatives 3, 4A, 4B and 6 have been established by chemical correlation, spectral analysis and X-ray diffraction.
STEREOCHEMISTRY OF POLYMERIZATION OF METHYL METHACRYLATE IN THE PRESENE OF CHIRAL LIGANDS
Bin YU , Xue Chun LIN , Meng Xian DING , Hui Zhen HU , Fo Song WANG
1993, 4(1): 27-30
[Abstract](152) [FullText HTML] [PDF 130KB](0)
Abstract:
Methyl methacrylate was anionically polymerized in the presence of chiral ligands, e.g. (+)-DDB and (-)-Sp. The polymers thus formed were optically inactive due to the instability of the helical chain for the less bulky ester group. Isotactic poly(methyl methacrylate) was given when (+)-DDB was used, whereas, a syndiotactic polymer was formed in the presence of (-)-Sp. Accordingly, two different propagation mechanisms were postulated.
THE STRUCTURE OF A NEW LIGNAN DIOL
Hong Jie WANG , Yan Yong CHEN , Xiao Tian LIANG
1993, 4(1): 31-32
[Abstract](157) [FullText HTML] [PDF 54KB](0)
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A lignan diol (1) was isolated from Schisandra rubriflora Rhed et Wils. It is racemic, with RS, RS, RS, SR configurations for the four consecutive asymmetric centers as shown.
TWO NEW CINNAMIC ACID DERIVATIVES FROM MAGNOLIA BIONDII PAMP
GuiQiu HAN , Qiu Li HUANG
1993, 4(1): 33-34
[Abstract](165) [FullText HTML] [PDF 78KB](0)
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Two new cinnamic acid derivatives named biondinin C and biondinin D were isolated from the flower buds of Magnolia biondii pamp. The structures were elucidated by the spectral data including 1H, 1H COSY, 1H-13C COSY spectra.
NEW COUMARINS FROM PEUCEDANUM PRAERUPTORUM
Ling Yi KONG , Yue Hu PEI , Xian LI , Ting Ru ZHU
1993, 4(1): 35-36
[Abstract](157) [FullText HTML] [PDF 66KB](0)
Abstract:
Four new coumarins named qianhucoumarins A, B, C, D have been isolated from traditional Chinese medicine-the root of Peucedanum praeruptorum. Their structures were elucidated by chemical evidences and spectral analysis.
NEW COMPOUNDS FROM PEUCEDANUM PRAERUPTORUM
Ling Yi KONG Yue Hu PEI Xian LI , Ting Ru ZHU
1993, 4(1): 37-38
[Abstract](165) [FullText HTML] [PDF 72KB](0)
Abstract:
Four new compounds named qianhucoumarins E, F, G and baihuaqianhuoside have been isolated from the root of Peucedanum praeruptorum. Their structures were elucidated by chemical evidences and spectral analysis.
A NEW DITERPENE GLYCOSIDE FRON ASTR AGERATOTDES TURCZ
Dong Liang CHENG , Xiao Ping CAO , Han Xun , WEI Li YANG
1993, 4(1): 39-40
[Abstract](165) [FullText HTML] [PDF 94KB](0)
Abstract:
From aerial part of Aster ageratoides, a new natural diterpene glucoside was isolated, Its structure was established by means of spectral and chemical methods as 16β-hydroxy-17-acetoxy-(-)-kauran-19-oic acid-β-D-glucopyranesyl ester.
SYNTHESIS AND CATALYSTIC BEHAVIOR OF A HEW PHASE-TRANSFER CATALYST SUPPORTEI ON SILICA GEL
Ru Hong KANG , Jian Lu ZHAO , Hui Lan CHEN , Wen Juan QIE , Wei Zhan JI
1993, 4(1): 41-44
[Abstract](175) [FullText HTML] [PDF 122KB](0)
Abstract:
A new catalyst with quaternary ammonium cation activated polyether chains immobilized on silica gel was applied to promote the reations of KI with n-C4H9-Br and KSCH with n-C4H9Br. The new catalyst showed much significant activity over other PEG functionalized silica gel.
THE HYDROXYLATON OF INACTIVE HYDROCARBONS WITH ACTIVE CARBON SUPPORTED METALLOPORPHYRINS
Wei Zhong ZHENG , Xian Yuan WANG , Guang Nian LI
1993, 4(1): 45-46
[Abstract](162) [FullText HTML] [PDF 78KB](0)
Abstract:
A supported Mn-porphyrin catalyst was prepared by adsorption of Mn-porphyrin on active carbon, and found to be efficient for the hydroxylation of hexane with hydrogen peroxide.
SYNTHESIS AND CHARACTERIZATION OF COMPLEXES OF TRANSITION METAL WITH PBDETA, A NEW POLYDENTATE LIGAND
Lu Qin YANG , Shi Ping YAN , Geng Lin WANG
1993, 4(1): 47-50
[Abstract](164) [FullText HTML] [PDF 128KB](0)
Abstract:
The synthesis and characterization are reported for a series of bi- and trinuclear complexes of the first transition metal ions with PBDETA, the newly synthesized polydentate ligand. The electron transition energy in binuclear compound is stronger than that in trinuclear. There is a weak antiferromagnetic exchange interaction in tricopper and trimanganese.
AN EASY ROUTE TO SYNTHESIZE COPPER(I) COMPLEXES Cu2(Ph2PCH2PPh2)2(NO8)2 AND Cu(Ph2PCH2CH2PPh2)(NO8). THEIR CHARACTERIZATION AND ELECTROCHEMISTRY
Zhen Feng XI , Dou Man JIN
1993, 4(1): 51-54
[Abstract](163) [FullText HTML] [PDF 162KB](0)
Abstract:
Binuclear Cu(Ⅰ) complex [Cu(dppm)(NO3)]2 (dppm=Ph2PCH2PPh2) and mononuclear Cu(Ⅰ) complex [Cu(dppe)(NO3)] (dppe=Ph2PCH2CH2PPh2) have been synthesized by the ligand-reduction reaction of cupric nitrate with dppm and dppe in methanol and characterized by means of ICP, elemental analyses, molecular weight determination, TG,31P-NMR, IR and Raman spectra; their electronic conductivities and CV waves have also been measured. Results show that dppm coordinates to the Cu(Ⅰ) atoms as a bridging bidentate ligand and dppe as a chelating bidentate ligand, (NO3)-1 behaves as a chelating bidentate ligand in both of the newly prepared complexes.
PREPARATION, CHARACTERIZATION AND ELECTROCHEMISTRY OF BINUCLEAR COPPER(Ⅰ) COMPLEXES Cu2(dppm)Cl2 AND Cu2(dppe)Cl2
Zhen Feng XI , Dou Man JIN , Jin Chun WU
1993, 4(1): 55-58
[Abstract](175) [FullText HTML] [PDF 149KB](1)
Abstract:
Two binuclear copper(I) complexes with novel structures and novel bonding,Cu2(Ph2PCH2PPh2)Cl2 (Ph2PCH2PPh2=dppm) and Cu2(Ph2P-CH2CH2PPh2)Cl2 (Ph2PCH2CH2PPh2=dppe), were prepared and characterized through elemental analyses, ICP, IR(4000-200 cm-1, CsI disc.), 31P-NMR spectra. Their electronic conductivities, oxidation and reduction potentials were measured. Preliminary studies show that both of the two complexes have chlorobridging and phosphorus-bridging structures.
SYNTHESIS, MAGNETIC PROPERTY AND X-RAY CRYSTAL STUCTURE OF MIXED VALENT COBALT COMPLEX SALT [Co Cl2(py)4][Co Cl3(py)]
Hao XU , Jin Yu LI , Zhong Zhi WU , Jian Zhong ZOU , Zheng XU , Xiao Zeng YOU , Zheng Chao DONG
1993, 4(1): 59-60
[Abstract](154) [FullText HTML] [PDF 81KB](0)
Abstract:
Complex salt Co2Cl5(py)5 (py=pyridine) was obtained by the reaction of CoCl2·6H2O with Bu4NMnO4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P21/n, fw=690.64, a=28.652(5), b=14.108(4), c=7.424(3)Å;β=90.09(1); V=3001(2)Å3; Z=4, Dc=1.53g/cm3. Final R factor is 0.041. The structure consists of a discrete cation [CoCl2(py)4]+ and an anion [Co Cl3(py)]-. The Co ion is coordinated by two Cl- and four pyridine nitrogen atoms to form an octahedral geometry, and Co is coordinated by three Cl- and one pyridine nitrogen atom to form the apices of a tetrahedron. The variable-temperature magnetic susceptility measurement shows no magnet-exchange interaction between Co and Co ions.
A NOVEL THIOPHENE-DERIVED N2O2 MACROCYCLEAND ITS Ag(Ⅰ) COMPLEX: SYNTHESIS AND CHARACTERIZATION
Fu Xin XIE , Guang YANG , Shi Sheng NI
1993, 4(1): 61-62
[Abstract](158) [FullText HTML] [PDF 111KB](0)
Abstract:
A novel macrocycle containing thiophene (L) was prepared first by the interaction of 2,5-bis-(chloromethyl)-thiophene (A) and salicylaldehyde to give 2, 5-bis-(2-formylphenoxymethyl)-thiophene (B), and then by the nontemplate cyclocondensation of 1,3-diaminopropane with (B) followed by a "onepot" reduction without isolation of the diimine intermediate. The corresponding silver complex, AgLClO4, was also prepared. The macrocycle was characterized by IR, elemental analysis, MS and 1HNMR
STUDIES ON THE LB FILM OF 2-HEPTADECYL IMIDAZOLECOORDINATING METAL IONS
Min MA , Feng Ling LIU , Ming Li SHI , Qing Ping DAI
1993, 4(1): 63-66
[Abstract](162) [FullText HTML] [PDF 131KB](0)
Abstract:
The surface pressure—area isotherms(π—A curves) of 2—heptadecyl imidazole (HIM) Langmuir films at the subphases of deionized water and solutions containing metal ions such as Cu2+, Cd2+, Ca2+, Co2+, Ag+ etc. have been studied. It was formed Langmuir film at the subphase containing Cu2+ or Ag+ ions and its LB film was successfully deposited. The molecular and ionic total energies (E) and stabil. ity energies (△E) forming complexes were computed by CNDO/2 method. The computational results agreed with the experiments.
THE DIFFUSION OF m-XYLENE ON MODIFIED ZnZSM-5 AROMATIZATION CATALYST BEFORE AND AFTER COKING
Wen Gui GUO , Jian Hui WU , Su Qin ZHAO , Rong Hui WANG , Juan LIANG
1993, 4(1): 67-68
[Abstract](177) [FullText HTML] [PDF 90KB](0)
Abstract:
The effect of coking amount for diffusion rate of m—xylene in a pore of the modified ZnZSM—5 aromatization catalyst has been studied.
ANALYSIS OF SYMMETRY OF C60) ADSORBED ON THE SILVER MIRROR BY SERS SPECTRUM
Jun HU , Zhi San XU , Shen Grong SHENG , Yun'e ZENG , Xiao Hua WANG , Shu Nian CHENG , Ling ZHU , Gui Hua LI
1993, 4(1): 69-70
[Abstract](160) [FullText HTML] [PDF 64KB](0)
Abstract:
The SERS spectrum of C60 was obtained by using silver mirror. From the SERS spectrum of C60 and the IR spectrum of C60, we proposed that C60 adsorbed on the silver mirror adopts a more ellipsoidal shape.
1-(4-ANTIPYRINYL)-3-(2, 4-DINITROPHENYL)-TRIAZENE AND ITS COLOUR REACTION WITH CADMIUM
Bin XU , Hong Yin ZHOU , Shu Yin TONG
1993, 4(1): 71-72
[Abstract](144) [FullText HTML] [PDF 76KB](0)
Abstract:
A new reagent,1(4 antipyriny1) 3 (2,4-dinitropheny1)triazene(APDNBT), was synthesized in this lab and its analytical properties and its colour reaction with cadmium were studied.
AB INITIO CALCULATION ON CAPTODATIVE EFFECT OF THE FREE RADICAL OF 2,2,2-TRIFLUOROETHYLAMINE
Wei Xing LI , Xun Jun ZHOU Nian Ci WU , Guo Qiang CAI
1993, 4(1): 73-74
[Abstract](139) [FullText HTML] [PDF 73KB](1)
Abstract:
This letter presents ab initio calculation of Captodative effect on 2,2,2-trifluoroethylamine free radical on STO-3G level. The △Ecd is -50. 15 kJ/mol, which means that this radical is of extra stabilization energy.
THEORETICAL STUDY ON THE EXCITED STATES AND STABILITIES OF B3, B3- AND B3+
Ze Xing CAO , An Min TIAN , Guo Ming LIANG , Guo Sen YAN
1993, 4(1): 75-78
[Abstract](129) [FullText HTML] [PDF 160KB](0)
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The geometries and vibrational frequencies of the ground and low-lying excited states for B3, B3- and B3+ are determined with the energy gradient method using the polarized double-zeta(6-31G*) basis set. The stabilities for the states of B3,B3- and B3+ have been investigated based on the vibrational analysis. The correlation energy obtained for each state is considered with the configuration interaction (CISD+Q) technique. B3 and B3+ have stable equilateral triangle geometry, while B3- has stable equilateral triangle, isosceles triangle and linear geometries. The Jahn-Teller distortion for a 3E' state of B3- in D3h symmetry is also discussed.
THE PREPARATION OF TITANIUM OXIDE OVERLAYER ON Fe(110) FOR SURFACE SCIENCE STUDIES
Jun Zhuo DENG , Hong Li WANG
1993, 4(1): 79-82
[Abstract](141) [FullText HTML] [PDF 188KB](0)
Abstract:
The preparation, characterization and properties of titania overlayer on Fe(110) substrate is hereby reported. The TiOX overlayer was found to form in a layer-by-layer mode with a suboxide of titanium in the form of TiO migrating into the Fe substrate and Fe migrating into the deposited layer of TiOX simultaneously during the deposition.
PHOTORESPONSE ON 1Cr18Ni9Ti STAINLESS STEEL IN PASSIVE AND TRANSPASSIVE REGIONS
Yong Jun JI , Mai Zhi YANG Sheng , Min CAI
1993, 4(1): 83-86
[Abstract](143) [FullText HTML] [PDF 120KB](0)
Abstract:
Photocurrent transients on stainless steel in the passive and transpassive regions in 0.5M H2SO4 were obtained using weak signal detecting technique. In passive region, the photoresponse an stainless steel exhibits n-type semiconductor characteristics. While changing from the passive to transpassive region, a n-p type transformation happens. This phenomenon is possibly caused by the change of the composition of passive film of stainless steel.
CORROSION INHIBITION OF STEARIC ACID LANGMUIR-BLODGETT MONOLAYERS ON IRON
Wei XING , Yi Bin SHAN , Du GUO , Tian Hong LU , Shi Ouan XI
1993, 4(1): 87-88
[Abstract](131) [FullText HTML] [PDF 89KB](0)
Abstract:
The Langmuir-Blodgett (LB) technique was used for the first time to study inhibition mechanism. Stearic acid Langmuir-Blodgett (SALB) monolayers showed a good inhibition effect on iron corrosion in neutral environment and the inhibition is mainly based on the blocking effect.
STUDY ON THE FORMATION OF BLACK PATINA ON BRONZE MIRRORS INDUCED BY HUMIC ACID
Zhao Zeng MA , Lian Ji JIN
1993, 4(1): 89-92
[Abstract](142) [FullText HTML] [PDF 163KB](0)
Abstract:
The black patina on some ancient Chinese bronze mirrors is known as " Black Lacquer Antique "(BLA) or "Hei-qi-qu", which looks jet-black and shiny. BLA's were corroded slowly, one of them was about 10-4mm per year in the soil. Many scholars have studied the composition and structure of BLA(1)(2)(3)(4), but the formation remains obscure. In this paper the formation of BLA on the surface of bronze mirror samples induced by humic acids under different conditions has been studied.
A SCF-SOCI STUDY ON THE LOW-LYING STATES OF H3+
Jie YANG , Guo Sen YAN , An Min TIAN , Au Chin TANG , Qian Shu LI
1993, 4(1): 93-94
[Abstract](132) [FullText HTML] [PDF 96KB](0)
Abstract:
The ground state and three low-lying states of the H3+ are determined by SOCI(Second Order Configuration Interaction) calculations. The results indicate that the 3Σu+ state of H3+ is a bound state, but 1A1 and 3A1 states are not stable, each of them will dissociate into H2+ and H atom. The SOCI energy -1.1144065au at an equidistant nuclear separation of 1.296A is in good agreement with the lowest value reported so far[1].
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