中国化学快报

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NEW SYNTHESIS OF UNSYMMETRICAL PHOSPHOROCHLORIDODITHIOATES

Lun Zu LIU, Ru Zhen, CAO Xiao, Dong SHI, Lan Bing FU, Guo Wei LI

中国化学快报. 1994, 5(10): 815-816.

摘要 ( )

可视化

Reaction of trialkylphosphorodithioates with dialkylamine yielded trialkylammonium phoshporodithioates,which then were chlorinated by phosphorus pentachloride to give the phosphorochloridodithioates.

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PEPTIDE SELF-FORMATION FROM N-DIISOPROPYLOXY PHOSPHORYL AMINO ACIDS AND PREBIOTIC SYNTHESIS OF PROTEIN

Yong JU, Yi CHEN, Yu Fen ZHAO

中国化学快报. 1994, 5(10): 817-820.

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In the presence of phosphoryl group,N-diisopropyloxy phosphoryl amino acids become more reactive and undergo self-catalysis to form the peptides by coupling with amino acids or their esters in aqueous solution at low temperature.The different side chain amino acid would appear with different reactivity.It might be important for the prebiotic synthesis of protein.

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SYNTHESIS OF A KETAL BY USING HPA AS CATALYST

Wan Sheng YOU, Yuan Peng GU, Xiao Hui LIU, Xing TIAN

中国化学快报. 1994, 5(10): 821-822.

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The work herein reported is about a rapid and convenient synthetic method of a ketal formed from ethylene glycol and cyclohexanone by using H₃PW₁₂O₄₀(HPA)as catalyst.It has been shown that the reaction,by using HPA as catalyst,can proceed at room temperature and have the high yield of 92% and the catalyst can be used again and again.

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REACTION OF ORGANODILITHIUM REGENT WITH αα-DIHALO-o-X YLENE

Hai Hong HUANG, Wei Guo LIU, Zhen Wei HUAN

中国化学快报. 1994, 5(10): 823-824.

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The reaction of organodilithium 1,4-dilithium-1,2,3,4-tetraphenyl-1,3-butadiene 1 with α,α'-dihalo-o-xylene (2a-c) was studied.The products and mechanisms of these reactions depend on the kind of halogen of α,α'-dihalo-oxylene.

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APPLICATIONS OF ULTRASONICALLY DISPERSED POTASSIUM(UDP)PART 4:REDUCTIVE COUPLING OF CHALCONES IN THE PRESENCE OF UDP,COMMENTS ON THE MECHANISM OF ALKALIMETAL REDUCTION OF α,β-UNSATURATED ENONES

Li Xin WANG, Yao Zeng Shi, Yi Ming YAO, Hong Wea HU

中国化学快报. 1994, 5(10): 825-828.

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The reductive coupling of chalcones using ultrasonically dispersed potassium is reported.1,6-diones and 1-benzoyl-2,3-diaryl-5-phenylcyolopent-1-ene mag be obtained in one-pot within a few miontes.No reduced products were obtaimed.The mechanism of the reaction is discussed

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SYNTHESIS AND CHARACTERIZATION OF EPOXYAND ALLYL-TERMINATED POLY(ARYLENEETHERSULPHONE)

Lian Lai ZHANG, Yi GU, Lu Xia JIANG, Xing Xian CAI

中国化学快报. 1994, 5(10): 829-830.

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Epoxy-terminated poly(arylene ether sulphone) and allyl-terminated poly(arylene ether sulphone) were prepared via hydroxy1-terminated oligomers under phase transfer catalyzed reaction conditions.The products were characterized by FT-IR,¹H-NMR and elemental analysis.

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9-ANTHROIC ACID SENSITIZED PHOTOLYSIS OF DIPHENYLIODONIUM SALTS THROUGH INTRA-ION PAIR ELECTRON TRANSFER

Xiu Zhi WANG, Er Jian WANG

中国化学快报. 1994, 5(10): 831-834.

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We have studied 9-anthroic acid sensitized photolysis of diphenyliodonium salts through fluorescence quenching,products analysis and photo-CIDNP.The photoinduced electron transfer rate constant was calculated to be 8.6×10¹⁰L/mol·s.From photo-CIDNP study,both diphenyliodo and phenyl radicals were confirmed as intermediates.Benzene is a cage escaped product from a singlet radical pair and diphenyliodonium salt is a recombination product from a triplet radical pair.

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TWO NEW TRITERPENOID SAPONINS,ASTERBATANOSIDE B AND C FROM ASTER BATANGENSIS

Yu SHAO, Bing Nan ZHOU

中国化学快报. 1994, 5(10): 835-838.

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Two new oleanane-type triterpenoid saponins,asterbatanoside B and C have been isolated from the roots of Aster batangensis and their structures elucidated as 2α,3β,23-trihydroxyolean-12-en-28-oic acid-28-O-β-D-glucopyranosyl-(1→6)β-D-glucopyranoside and 3-O-β-D-glucopyranosyl-2β,3β,23-trihydroxyolean-12-en-28-oic acid-28-O-β-D-glucopyranoside by means of spectral data and chemical evidence.

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A NEW TRITERPENOID SAPONIN, ASTERYUNNANOSIDE H, FROM ASTER YUNNANENSIS

Yu SHAO, Bing Nan ZHOU, Kan MA, Hou Ming WU

中国化学快报. 1994, 5(10): 839-842.

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A new echinocystic acid saponin,asteryunnanoside H (1),has been isolated from the roots of Aster yunnanensis (Compositae).The structure and the unambiguous assignments of the ¹H- and ¹³C NMR data of 1 were obtained based on extensive use of 1D and 2D NMR techniques (COSY,TOCSY,ROESY,HMQC and HMBC), and chemical transformations.

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TWO NEW OLEANOLIC ACID SAPONINS FROM ASTER YUNNANENSIS

Yu SHAO, Bing Nan ZHOU, Long Ze LIN, Geoffrey A. Cofdell

中国化学快报. 1994, 5(10): 843-846.

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Two new oleanolic acid saponins named asteryunnanoside F and G were isolated from the roots of Aster yunnanensis.The chemical structures were determined as oleanolic acid-28-O-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside and 3-O-β-D-glucopyranosyl-oleanolic acid-28-O-β-D-glucopyranosyl-(1→6)[α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyranoside by spectral data,especially 2D NMR analysis (COSY,HETCOR,HOHAHA and ROESY), and chemical transformations.

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TWO NEW LIGNANS FROM MAGNOLIA BIONDII PAMP

Yu Liana MA, Cui Qiu HAN

中国化学快报. 1994, 5(10): 847-848.

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可视化

Two new lignans,named biondinin B and E,were isolated from the flower buds of Magnolia biondii Pamp.Their structures were elucidated on the basis of spectral analyses.

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A NEW FLAVONE C-GLYCOSIDE FROM SCUTELLARIA BAICALENSIS

Yong Yu ZHANG, Xian LI, Yun Zhen GOU, Yoshihiro HARIGAYA, Masayuki ONDA, Kadsunori HASHIMOTO, yukinobu IKEYA, Minoru OKADA, Macao MARUNO

中国化学快报. 1994, 5(10): 849-850.

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A new flavone C-glycoside,chrysin 8-C-β-D-glucoside and one known phenylpropanoid glycoside,acteoside¹ were isolated from the roots of Scutellaria baicalensis Georgi (Labiatae) for the first time.

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STUDIES ON THE CONSTITUENTS OF THE ROOTS OF SCUTELLARIA PLANIPES

Yous Yu ZHaNG, Xian LI, Yun Zhen GOU, Yoshthiro HARIGAYA, Maraguki ONDA, KadBunori HASHIMOTO, Yuklnobu IK EYA, Minoru OKADA, Masao MARU

中国化学快报. 1994, 5(10): 851-854.

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Two new flavonoids,5,7,3',6'-tetrahydroxy-6,8,2'-trimethoxyfiavone [1],(2R,3R)-3,5,7,2',5'-pentahydroxyflavanone [2] and a naturally occurring new flavone,7,2'-dihydroxy-5-methoxyflavone [3] were isolated,together with ten known flavonids and three glycosides of phenylethanoid for the first time from the roots of Scutellaria planipes.

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CRINISINE,A NEW ALKALOID FROM CRINUM ASIATICUM L.VAR.SINICUM (ROXB.EX HERB)BAKER

Ren Jiu TANG, Ningji BI, Guang En MA

中国化学快报. 1994, 5(10): 855-858.

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From the bulbs of Crinum asiaticum L.var.sinicum Bak.,a new alkaloid,crinisine,has been isolated and characterized on the basis of comprehensive spectral analyses.Additionally,three known alkaloids,lycorine,powelline and crinine were also obtained.

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ADDITIVE EFFECT ON THE MI CELLE-CATAL TIC HYDROLYSIS OF CARBOXYLIC ACID ESTERS

Guo Xi ZhAO, Ya Ping ZHOU, Bu Yao ZHU

中国化学快报. 1994, 5(10): 859-860.

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The alkaline hydrolysis of p-nitrophenyl propionate and acetate in the micellar solution of cetyltrimethylammonium bromide with buffer has been investigated.Different catalytic effects,even inhibition,upon the ester hydrolysis reaction have been observed.The accompanying ammonolysis,which was overlooked in the past,plays an inhibition role in the micelle-catalytic hydrolysis.

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AN EFFECTIVE ORGANO-BIMETALLIC Rh-Co CLUSTER CATALYST FOR HYDROFORMYLATION

Lin HUANG, Yi De XU, An Mind LIU

中国化学快报. 1994, 5(10): 861-862.

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RhCo₃(CO)₁₂/SiO₂ after decarbonylated is regenerable under CO,and catalyzes ethylene hydroformylation with high activity and stability.

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ENHANCED C₂ YIELD OF METHANE OXIDATIVE COUPLING BY MEANS OF A DOUBLE LAYERED CATALYST BED

Yu Da LIU, Hong Binb ZHANG, Qiao Juan SU, Guo Dong LIN, Khi Rui TSAI

中国化学快报. 1994, 5(10): 863-864.

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A double layered catalyst bed with K⁺-ThO₂-BaCO₃ close to the reactor inlet and La₂O₃-BaCO₃ downflow of the upper layer of the bed has been used to catalyze methane oxidative coupling reaction.The C₂ yield and C₂ selectivity obtained on the double layered catalyst bed were found to be higher than that obtained with either of the catalyst operating separately.

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HOMOLOGY PROTEIN STRUCTURE PREDICTION FOR PHOSPHOLIPASE A₂

Qiao Lin DENG, Lu Hua LAI, Yu LUO, Yan Li WANG, Xiao Jie XU, You Qi TANG

中国化学快报. 1994, 5(10): 865-868.

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The homology protein modeling method was used to construct the structure of phospholipase A₂ from human rheumatoid arthritic synovial fluid.The sequence and structure compatibility was evaluated by STRCTR program.By comparison of the predicted and the X-ray crystal structure,we found that the active site was looser in the former.It has been proved in the inhibitor design process that the structure from homology prediction is also a good starting point for rational drug design.

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CELLULOSE MEMBRANE USED AS STATIONARY PHASE OF MEMBRANE AFFINITY CHROMATOGRAPHY

Wei GUO, Zhen Hua SHANG, Yi Nian YU, Liang Mo ZHOU

中国化学快报. 1994, 5(10): 869-872.

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Cellulose membrane was used as stationary phase of affinity chromatography.A method for the preparation of micropore cellulose membrane from cellulose film is described.Triazine dyes,Cibacron Blue F3GA and Active Red K2BP were immobilized as affinity ligands.Up to 100 mg Cibacron Blue F3GA can be coupled onto 1 g membrane matrix.A membrane cartridge containing blue affinity membranes was also prepared.The flux of the cartridge was much superior to that of column packed with agarose as separation medium.On this cartridge,the chromatography of human serum albumin was performed.

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A STUDY ON DNA ADDUCTION WITH NICOTINE-DERIVED NITROSAMINE BY ACCELERATOR MASS SPECTROMETRY

Xin Song LI, Yuan Fang LIU, Jin Yuan SHI, xiang Yun WANG, Ke Xin LIU, Zhi Yu GUO, Kun LI, Chia Erh CHEN, Si Xun YUAN

中国化学快报. 1994, 5(10): 873-876.

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DNA adduction with nicotine-derived nitrosamine,4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone(NNK) in mice at doses equivalent to human exposure has been studied using ¹⁴C-label by accelerator mass spectrometry(AMS).A detection limit of DNA adducts of 1 adduct per 10¹⁰ nucleotides has been achieved.This sensitivity of AMS measurement is 3 or more orders of magnitude improved than that of radioimmunoassay.Formation of DNA adducts is linearly dependent on dose down to an exposure of 100 ng per kg of body weight.The ultimate chemical form of carcinogen NNK binding to DNA is speculated.

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STUDIES ON PREPARATION OF HETEROGENEOUS HYDROGELS AND THEIR USES FOR CONTROLLED RELEASE OF DRUGS

Feng LIU, Ren Xi ZHUO

中国化学快报. 1994, 5(10): 877-878.

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Two series of heterogeneous hydrogels composed of cross-linked poly(N-isopropylacrylamide) and polydimethyl silicone were prepared,and then levonorgestrel (LNG) was loaded into them.The results of in vitro release show that they can release LNG in a zero order rate with prolonged period.

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DETERMINATION OF SERUM ALBUMIN USING A SILVER ION SELECTIVE ELECTRODE

Feng Lian LU

中国化学快报. 1994, 5(10): 879-880.

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In this paper is reported a new method of determining serum albumin with potentiometry.The silver ion selective electrode was used as working electrode and S.C.E as reference electrode.By controlling the ionic strength,pH and temperature constant,a good linear relationship was obtained between the cell potential and albumin concentration.This method possessed characters of operating simplicity,rapidity and directness.The samples could be detected directly and the results were in accordance with the values detected by classic K method.

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A STUDY ON THE ADSORPTION VOLTAMEMTRY OF THE INDIUMSEMIXYLENOL ORANGE

Xiao Li ZHAng, Li Zeng WANG, Cheng Song MA, Yi Hong HU

中国化学快报. 1994, 5(10): 881-884.

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The electrochemical behaviour of the indium complex with semixylenol orange at a hanging mercury electrode has been investigated in HAc-NaAc solution(pH=3.66).The mechanism of the electrode reaction was found to be reduction of (Ⅲ)L₂ adsorbed on the electrode by irreversible charges transfer to metal amalgam,In(Ⅲ)Hg.The detection limit and the linear range are 6.5×10^-11mol/L and 3.0×10^-10)-1.5×10^-9mol/L respectively.This method has been applied to determine indium in samples of nickel and nickel sulfate.

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AN EMPIRICAL POTENTIAL ENERGY FUNCTION FOR MOLECULE-CLUSTER INTERACTIONS

Hua Gen YU, Ji Yuan CHENG

中国化学快报. 1994, 5(10): 885-888.

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A new empirical potential energy function for molecule-cluster interaction is presented.It is approximately separated into two contributions:V_LEPS which is based upon a modified LEPS potential accounting for the interactions between gas atoms and the cluster and among the gas atoms,and V_CL which comprises two-and three-body terms representing the atom-atom interactions within the cluster.This function is transferable from small cluster to bulk system such as solid surfaces.The preliminary dynamical calculations of dissociation of H₂ and D₂ on rigid and non-rigid Cu₇ clusters are also given.

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THE REACTION OF(μ3-CPh)Co₃(CO)₉ WITH TRANSITION METAL CARBONYL ANION M(CO)₃(RCOCp) AND CHARACTERIZATION OF CLUSTERS(μ₃-CPh)CO₂M(CO)₈(RCOCPp)(M=Mo,W；R=H,CH₃.C₂H₅O)

He Ping WU, Yuan Qi YIN, Dao Sen JIN

中国化学快报. 1994, 5(10): 889-892.

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Clusters(μ₃-CPh)Co₂M(CO)₈(RCOCp)(M=Mo,W;R=H,CH₃,C₂H₅O) were synthesized by refluxing a solution of(μ₃-CPh)Co₃(CO)₉ and transition metal carbonyl anion M(CO)₃(RCOCp) in THF.The clusters were characterized by C/H analysis,IR and ¹H NMR.

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THE SYNTHESIS AND CRYSTAL STRUCTURE COMPLEX OF SCHIFF BASE CONTAINING S·N-Cd₃|CH₃O(O)C₆H₃CH=NNHC(S)NH₂|₄·(CH₃COO₂·1/2[CH₃S(O)CH₃]·2H₂O

Xue Cui CUI, Qing Ping HU

中国化学快报. 1994, 5(10): 893-896.

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The title complex is a new trinuclecadmium(Ⅱ) chelate of Schiff base containing S and N atoms.The complex crystallizes in the monocline,space group C2/c,with cell dimensions:a=34.214(4),b=11.581(2),c=17.932(5)?,β=119.76(1)°,V=6168 ?³,Mr=1427.45,Z=4,Dc=1.54g/cm³,μ=12.48cm^-1,F(000)=2860.The structure was solved by direct method and the final R=0.066.

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HYDROGEN DIFFUSION IN MICROCRYSTALLINE LaNi_3.94Si_0.54 FILMS

Jin Song HUANG, Zuo Xiang ZHOU, Wei Kang HU, Feng Yi YAO, De Ying SONG

中国化学快报. 1994, 5(10): 897-900.

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Hydrogen diffusion studies of microcrystalline LaNi_3.94Si_0.54 films were conducted using the electrochemical permeation technique.Hydrogen diffusion transient curves were found to be composed of two steps of transients,which might be ascribed to the transition from α phase to hydride phase and the following migration of the phase boundary.The hydrogen diffusion coefficients in the a phase of the alloy film were also calculated from the hydrogen diffusion transient curves.

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PORE SIZE AND STRUCTURE OF NON-SUPPORTED SILICA MEMBRANES

Yao ZHOU, Zhi Guo SU, Xiu Ren ZHAO, Yong Ying CHEN

中国化学快报. 1994, 5(10): 901-904.

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Structure evolution of both TEOS and colloidal silica in the sol-gel process was studied.Different growth models of polymer sols due to different precursors result in great difference on microstructure and pore size distribution of unsupported silica membranes.

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RECOVERY OF EUROPIUM FROM CROWN ETHER COMPLEX SOLUTIONS BY THE ELECTROCHEMICAL METHOD

Fan Qi KONG, Zhang Yu YU, Ke Qiang GU, Xing Hu XU, Mei QIN, Shen Hua MIAO, Rong Sheng FANG

中国化学快报. 1994, 5(10): 905-908.

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By using an electrolytic cell with a cation-exchange membrane,europium is recovered from nitrobenzene solution obtained from the solvent extraction with 4-tert-butylbenzo-15-crown-5 in the presence of picric acid.This method permits the separation of metal ions from crown ethers and counter anions.There is no loss of expensive extractant during the electrolysis.

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1994年, 第5卷, 第10期　刊出日期：1994-10-20

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1994年, 第5卷, 第10期 刊出日期：1994-10-20

1994年, 第5卷, 第10期　刊出日期：1994-10-20