中国化学快报

Select

STUDY ON THE INTRAMOLECULAR CYCLIZATION THROUGH OPENING OF EPOXIDE I CYCLIZATION OF N-METHYL-N-BENZOYLMETHYLENE-β-PHENYL-α,β-EPOXYPROPIONAMIDE IN APROTIC SOLVENT

Guang Zhong YANG, Li Hong WANG, Liang HUANG

中国化学快报. 1993, 4(12): 1035-1036.

摘要 ( )

可视化

Intramolecular cyclization of A catalyzed by IDA in benzene or THF yields two γ-lactams through C-alkylation and one δ- and one 7-membered lactam by O-alkylation.

Select

STUDY ON THE INTRAMOLECULAR CVCLIZATION THROUGH OPENING OF EPOXIDE II RING CLOSURE OF N-METHYL-N-BENZOYLMETHYLENE-β-PHENYL-α,β-EPOXYPROPIONAMIDE IN PROTIC SOLVENT

Hao HONG, Dao Fei HUANG, Liang HUANG

中国化学快报. 1993, 4(12): 1037-1038.

摘要 ( )

可视化

When the title compound was treated in protic solvent with alkali catalyses, γ-lacatam was almost the sole product. The ratio of ketone 1 to ketone 2 depended upon the reaction condition.

Select

FORMATION OF 16.24-DEHYDROBILADIENE-ab FROH PYRROMETHENONE

Jin She MA, Chang Qi WANG, Qing Qi CHEN, Yong Yong LIU, Jing Zun WANG, Sheng JIN

中国化学快报. 1993, 4(12): 1039-1040.

摘要 ( )

可视化

In the reaction of Pyrromethenone with bromine in methanol a new compound with two azafulvenes, 16.24-dehydrobiladiene-ab, was first investigated.

Select

SYNTHESIS AND CHARACTERIZATION OF A NOVEL MACROCYCLE DERIVED FROM SUCCINIC DIHYDRAZIDE AND 2,6-DIFORMYL-4-METHYLPHENOL

Yun Qi TIAN, Ke YU, Qi Tao LIU

中国化学快报. 1993, 4(12): 1041-1042.

摘要 ( )

可视化

The synthesis and properties of a novel of macrocycle H₆L derived from succinic dihydrazide and 2, 6-diformyl-4-methylphenol was described. From the NMR resuli the macrocycle was supposed to exist in solution as a equilibrium of ketone and enol.

Select

STUDIES ON CROWN ETHER CYANINE DYES(Ⅺ)THE SYNTHESIS OF BENZOTELLURAZOLE CROWN ETHER CYANINE DYES

Xiu Fang LIU, Xue Hong LUO, Han Sheng XU

中国化学快报. 1993, 4(12): 1043-1046.

摘要 ( )

可视化

Three methods for synthesis of benzotellurazole crown ether (6) are described. The cyanine dye (8) can be easily obtained by treating (6) with CH₃I and CH (OEt)_a.

Select

STUDIES ON ORGANOPHOSPHORUS COMPOUNDS 86 SOME NEW ASPECTS ON THE SYNTHESIS OF DIALKYL 1-ISOCYANO-BENZYL- AND/OR ALKYL-PHOSPHONATES

Cheng Ye YUAN, Wei Sheng HUANG, Zhi Bin YUAN

中国化学快报. 1993, 4(12): 1047-1050.

摘要 ( )

可视化

1-Isocyano substituted benzylphosphonates were prepared by dehydration of 1-N-formylamino substituted benzylphosphonates, which were obtained by a tricomponental condensation described by us. Mean-while addition of diethyl phosphite to N-trityl aldimine followed by deprotection, formylation and dehydration gave corresponding 1-isocyano alkylphosphonates in one-pot procedure.

Select

A NEW SYNTHESIS OF SULFONES VIA THE ZINC-ASSISTED COUPLING OF ARENESULFONYL CHLORIDE WITH ALKYL HALIDES

Cai Ding XU, Ji Qing JIANG, Xian HUANG

中国化学快报. 1993, 4(12): 1051-1052.

摘要 ( )

可视化

Arenesulfonyl chloride undergoes a facile one-pot coupling reaction with active halides assisted by zinc to give the corresponding sulfones in acceptable yields.

Select

SYNTHESIS OF ADENOSINE DERIVATIVES WITH CARBOXYALKYL SIDE CHAIN AT 2',3'OR 5'POSITION

Zeng Li SONG, Jun Dong ZHANG, Li He ZHANG

中国化学快报. 1993, 4(12): 1053-1056.

摘要 ( )

可视化

Some nucleoside carhoxylic acid derivatives, such as (±) ethyl ester of griseolic acid D (4) and 9-(2'-deoxy-2'-(benzyloxycarbonyl)-methylene-β-D-rihohept-2'-enofuranosyluranate) adenine (11), were synthesized. The formation of lactone of 5'-deoxy-adenosineacetic acid (AAA, 3) was investigated by using different reagents for lactonization from AAA, but all of the efforts failed, and some unexpected compounds were obtained.

Select

NOVEL BIS-(N-ALKYL-N,N-DIMETHYL AMMONIUM)POLYETHYLENEGLYCOL ETHER SALIS AS PHASE TRANSFER CATALYSTS IN THE CONDENSATION OF 1,4-DIACETYL-2,5-PIPERAZINEDIONE AND ALDEHYDES

Yao Zeng SHI, Li Kin WANG, Zheng Ming DU, Hong Wen HU

中国化学快报. 1993, 4(12): 1057-1060.

摘要 ( )

可视化

Five novel bis-(N-alkyl-N, N-dimethyl ammonium) polyethyleneglyool ether salts prepared by our previously reported procedare show high catalytic efficiency in the condensation of 1, 4-diacetyl-2, 5-piperazinedione and aldehydes at both higher and lower temperature even in lower concentration. They also show catalytic selectivity at lower temperature.

Select

OXIDATIVE DEHYDROGENATION OF PROPANE OVER MCl_n/V-Mg-O CATALYSTS

Wei De ZHANG, Zhi Min FANG, Jia Ning JIANG, Hui Lin WAN, Qi Rui CAI

中国化学快报. 1993, 4(12): 1061-1064.

摘要 ( )

可视化

Oxidative dehydrogenation of propane over V-Mg-O and MCl_n (M=Cu⁺, Li⁺, Ag⁺, Cd²⁺) promoted V-Mg-O catalysts was studied. XRD result showed that the V-Mg-Ocatalysts were composed of MgO and Mg₃(VO₄)₂. The yield of propene was much higher over CuCl and LiCl promoted VMgO catalysts than that over VMgO catalysts at the same reaction temperature. The highest yield of propene reached 23.1% at 500℃ and 6000h^-1 space velocity.

Select

NEW ANTITUMOR GLYCOCYCLOHEXAPEPTIDE FROM RUBIA YUNNANENSIS

Min HE, Cheng ZOU, Xiao Jiang HAO, Jun ZHOU

中国化学快报. 1993, 4(12): 1065-1066.

摘要 ( )

可视化

A new antitumor glycocyclohexapcptide, RY-Ⅲ, was isolated from Rubia yunnanensis. The structure of RY-Ⅲ was elucidated by means of spectral methods.

Select

TWO MINOR ALKALOIDS FROM THE ROOTS OF STEMONA TUBEROSA L.

Wen Han LIN, Lei WANG, Liang QIAO, Meng Shen CAI

中国化学快报. 1993, 4(12): 1067-1070.

摘要 ( )

可视化

Two new alkaloids namely tuberostemoninal and tuberostemoamide as minor components were isolated from the roots of Stemona tuberosa. Their structures were determined by various 2D NMR and other spectra and finally confirmed by X-ray analysis.

Select

HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC ANALYSIS OF KR-008 IN BIOLOGICAL FLUIDS

Chun Sheng LIU, Tong Hui ZHOU, Yun Seon SONG, Jae Chun RYU, Myungsoo KIM

中国化学快报. 1993, 4(12): 1071-1074.

摘要 ( )

可视化

A high-performance liquid chromatographic method for the simultaneous determination of KR-008 and its metabolite in biological fluids was developed The samples were injected directly without further treatment, the compounds were separated and analysed on a reversedphase column under isocratic conditions, including ion pairing. Concentrations in urine and bile were determined by an external standard method. The detection limit was 0.8μg/ml in urine. Preliminary data showed that, following i. p. administration (120mg/kg) of KR-008 to rats, approximately 2.8% of the dose was excreted in urine as unchanged compound and more than 8.9% was as a metabolite;in bbile it was 0.73% excreted as unchanged form and above 0.29% as the metabolite. The peak biliary concentration of KR-008 was 0.39mg/ml at 20min after dosing.

Select

THE STUDY OF PHARMACEUTICALS BY THIN-LAYER SPECTROELECTROCHEMISTRY(I)——THE REDOX MECHANISM OF NITROFURAZONE

Jing Hong LI, Guang Jin CHENG, Shao Jun DONG

中国化学快报. 1993, 4(12): 1075-1078.

摘要 ( )

可视化

The electrochemical behavior of nitrofurazone in dimethylformamide has been studied by cyclic voltammetry and in-situ thin-layer spectroelectrochemistry. The redox reactions are complicated at platinium electrode, and a possible electrochemical mechanism of nitrofurazone is proposed.

Select

A NEW STAINING METHOD FOR THE MEASUREMENT OF PROTEIN USING TETRAPHENYLPORPHYRIN TETRASULFONATE(TPPS₄)

Shen Yang TONG, Na LI

中国化学快报. 1993, 4(12): 1079-1080.

摘要 ( )

可视化

A new dye-staining method for protein assay is described. The reaction between TPPS₄ and protein molecule causes a shift in the absorption of TPPS₄ from 435 nm to 488 nm. The absorbance at 488 nm is proportional to the concentration of protein. The range of Beer's law was 1-5 ug/ml and the Sandell's sensitivity was 0.0087 ug/cm².

Select

ANALYSIS OF HUMAN PLACENTA BY ³¹P NUCLEAR MAGNETIC RESONANCE AND THIN-LAYER CHROMATOGRAPHY SCANNING COMBINED WITH THE CORRECTIVE METHOD OF ABSORBANCE PROPORTIONAL COEFFICIENT

Rong GUO, Jian Wei CHEN, Yi Min XU, Ai Hua ZHANG

中国化学快报. 1993, 4(12): 1081-1084.

摘要 ( )

可视化

Five phospholipids in human placenta were determined by phosphorus 31 nuclear magnetic resonance (³¹P NMR) spectroscopy and thin-layer chromatography (TLC) scanning combined with the corrective method of absorbance proportional coefficient. The NMR spectrometer used this investigation was a Bruker AM-500 spectrometeroperating at 202.4 MHz for ³¹P chemical shifts are relative to 85% phosphoric acid. TIC was carried out by silica gel H plate developed in chloroform-methanol-glacialacetic acid-ethanol-water (25:4:6:2:0.5), with Vaskovsky reagent as colour-developing agent of phospholipids.

Select

STUDY OF COMPLEXATION OF BARBITURATES WITH β-CYCLODEXTRIN

Xue Mei WANG, Hong Yuan CHEN

中国化学快报. 1993, 4(12): 1085-1088.

摘要 ( )

可视化

The nature of the quenching of barbiturate fluorescence by forming inclusion complexcs with β-cyclodextrin is investigated principally using fluorescence/absorption and Fourier transform infrared (FTIR) spectroscopy. The relatively weak complexes formed in aqueous solutions indicated through the IR spectroscopies are confirmed by the apparent formation constants acquired by using fluorescence method. Further specific information concerning the mechanisms of interaction has been explored in detail by means of the analysis of the electrochemical and spectroscopic behaviour.

Select

CONCENTRATION DEPENDENCE OF DILUTE HCL ON DIMERIZATION OF ZnTSPC IN AQUEOUS SOLUTION

Yong QIU, Xian Fu ZHANG, Fu Shi ZHANG, XIN Qi SONG

中国化学快报. 1993, 4(12): 1089-1092.

摘要 ( )

可视化

The pH dependence of Zinc (Ⅱ) tetrasulfonated phthalocyanine in aqueous solution has been investigated. The tendency of dimerization was enhanced by the addition of HCl, with blue-shifted peaks appearing in the Q band as well as the Soret band region. And the demetallation of metallophthalocyanines caused by the acid was confirmed by spectroscopic evidence for the first time. The effect caused by NaOH was also discussed.

Select

EPITAXIAL CRYSTALLIZATION OF POLY(ε-CAPROLACTONE)ON HIGHLY ORIENTED ISOTACTIC POLYPROPYLENE

Xiao Hui TAO, Shou Ke YAN, De Cai YANG

中国化学快报. 1993, 4(12): 1093-1096.

摘要 ( )

可视化

Electron microscope and electron diffraction have been used to study epitaxial crystallization of poly (ε-caprolactone) (PCL). on highly oriented film of isotactic polypropylene (iPP). The results obtained from bright field (BF) electron micrograph and electron diffraction indicate that the PCL can epitaxially grow on iPP substrate and form cross-hatched lamellar texture. The c axes of PCL are ±50° apart from the c axes of iPP. The contact planes of the two kinds of crystals are (010) of iPP and (100) of PCL, respectively.

Select

STUDY ON THE STABILITY AND STACKING INTERACTION EFFECT OF THE TERNARY M(Ⅱ)(ATP) AND PYRIDINE-LIKE LIGANDS

Bin SONG, Jie ZHANG, Fu Hai WU, Liang Nian JI

中国化学快报. 1993, 4(12): 1097-1100.

摘要 ( )

可视化

The stabilities of the complexes of three pyridine-like ligands with M(Ⅱ)(ATP)^2- and M(Ⅱ)(M=Ni, Co) were studied by spectrophotometry and by comparing the stability constants of the ternary complexes with those of the binary complexes. A stacking interaction between the pyridine ring and the purine ring of ATP is indicated. The general existence of the stacking interaction encourages us to interpret the antitumor mechanism of a new class of antitumor drugs.

Select

RELATIVISTIC EFFECTS IN THE CdF SYSTEM

Xue Yan TU, Shu Shan DAI

中国化学快报. 1993, 4(12): 1101-1104.

摘要 ( )

可视化

In this paper, the nanrelativistic and relativistic pseudo-potentials (i.e. HF-MEFIT-PP and WB-MEFIT-PP) for Cd were used to calculate the potential curves of the six Low-Lying states of CdF system. Furthermore, we carried out their spectroscopic constants (R., Do, T., and ω.). Based on the above results, the relativistic effects on the spectroscopic constants were discussed.

Select

ELECTROCHEMICAL STUDIES OF TITANIUM(Ⅳ)IN 1-METHYL-3-ETHYLIMIDAZOLIUM CHLORIDE

Bei Long FANG

中国化学快报. 1993, 4(12): 1105-1108.

摘要 ( )

可视化

A Titanium tetrachloride-1-methyl-3-ethytimidazolium chloride melt has been prepared. The reduction process of Ti (Ⅳ) appears to be diffusion controlled in the composition of 0.4:1 mole ralio of TiCl₄-1-methyl-3-ethylimidazolium chloride and the electrochemical behavior of Ti (Ⅳ) shows remarkable compositon dependence.

Select

SPECIATION OF Cu、Pb、Zn、Cr IN DUST OF DIFFERENT ORIGINS AND DIAMETERS

Lian Cun GAO, Gui Hua HE, Shu Ren WANG, Su Ping FENG

中国化学快报. 1993, 4(12): 1109-1112.

摘要 ( )

可视化

Various species of Cu. Pb, Zn and Cr in dust of different origins and diameters were studied using Tessler scheme, and the partition law was revealed, The results indicated that superior form of Cu、Pb、Zn and Cr was bound to organic master, bound to Fe-Mn oxides, bound to Fe-Mn oxides and residual. So their activity order was Zn >Pb >Cu >Cr. The exchangeable metals bound to carbonates and Fe-Mn oxides of four heavy metals in small particles were superior to those in large particles, which illustrated that heavy metals in small paticles were more active and harmful.

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

1993年, 第4卷, 第12期　刊出日期：1993-12-20

选择文件类型/文献管理软件名称

选择包含的内容

本期目录

1993年, 第4卷, 第12期 刊出日期：1993-12-20

1993年, 第4卷, 第12期　刊出日期：1993-12-20