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Chinese Chemical Letters 1991年第10期2卷 761-762页

作者： Hun Ping HU Xin WANG and Xin Fu PAN State Key Laboratory. of Applied Organic Chemistry, lanzhou university, lanzhou 730000

1,7β- Dimethyl-7α- hydroxy-8aα-carboxymethyl-9β-carbomethoxy-4bα, 5, 6, 7, 8, 8α-hexahydrofluorene lactone(2) is converted to 8, 12-epoxyallogibberic acid methyl ester(4) by the action of diisobutyl aluminum hyd... 详细信息

关键词： CARBOMETHOXY-4b CARBOXYMETHYL-9 HYDROXY-8a DIMETHYL-7 THE REARRANGEMENT OF 1,7

SYNTHESIS,CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF TRANSITION METAL COMPLEXES WITH 5-HYDROXY-7, 4'-DIMETHOXYFLAVONE

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Chinese Chemical Letters 1992年第2期3卷 93-94页

作者： Fang Jie ZHANG Shuang Xi WANG Yu Lin LI~* State Key Laboratory of Applied Organic Chemistry lanzhou university, lanzhou 730000

Complexes of Cu~Ⅱ, Ni~Ⅱ, Co~Ⅱ, Zn~Ⅱ, Fe~Ⅲ, Cr~Ⅲ, Cd~Ⅱ and Mn~Ⅱ with the natural product 5-hydroxy-7,4′-dimethoxyflavone(1) have been prepared and their probable structures were proposed on the basis of elemental analyses, thermal analyses and IR and UV spectral data. The ligand and all the complexes were tested in vitro for their antibacterial activity.

关键词： SYNTHESIS,CHARACTERIZATION AND BIOLOGICAL ACTIVITY OF TRANSITION METAL COMPLEXES WITH 5-HYDROXY-7 DIMETHOXYFLAVONE

Atmospheric particulate pollution of lanzhou using magnetic measurements

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Journal of Environmental Sciences 1999年第3期11卷 373-377页

To differentiate between natural and anthropogenic particulate sources in the atmosphere in lanzhou City, samples were collected in different sites. The dust flux was calculated and magnetic measurements were conducted. Results show a distinct pattern of variation of dust flux within a year and it agrees with the shifts of atmospheric circulation regime. The magnetic parameters indicate that natural sources are the major components of atmospheric particulate during late spring and early summer, while anthropogenic sources contribute much more during winter months. The data also support the earlier findings that magnetic parameters are effective for differentiating between particulate arising from natural sources such as soil erosion and from anthropogenic sources such as coal combustion.

关键词： atmospheric particulate dust flux magnetic measurement lanzhou of China.

SYNTHESIS OF 2,2''-BIFLAVANONES

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Chinese Chemical Letters 1991年第4期2卷 273-274页

作者： Yu Lin LI Fang Jie ZHANG Laboratory of Applied Organic Chemistry,Institute o f Organic Chemistry,lanzhou university,lanzhou,730060

A new approach to the synthesis of 2,2″-biflavanones by the reductive dimerization of flavones is *** racemate and meso compounds of each bitlavanone have been separated and their structures have been determined on t... 详细信息

关键词： ppm OCH Ca IR cm SYNTHESIS OF 2,2 BIFLAVANONES

PREVOST-WOODWARD HYDROXYLATION OF 3,5-CYCLO-24S-ETHYL-CHOLEST-22-EN-6-ONE

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Chinese Chemical Letters 1990年第1期1卷 25-26页

作者： Institute of Organic Chemistry,lanzhou university,lanzhou 730000Xiao Tian LIANG Institute of Materia Medica,Nan-wei Road,Beijing 100050

Preost-Woodward hydroxylation of 2 gave the 22S,23S-glycol(3), contrary to *** is suggested that the formation of the two possible iodonium ions(4a and 4b)are reversible,thus allowing the discriminatory acetoxy group ... 详细信息

关键词： PREVOST-WOODWARD HYDROXYLATION OF 3,5-CYCLO-24S-ETHYL-CHOLEST-22-EN-6-ONE KOH EN

HYDRAZONES CONTAINING NORBORNENYL AND THEIR COPPER(Ⅱ) COMPLEXES

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Chinese Chemical Letters 1994年第5期5卷 413-414页

作者： Qing Bao SONG Xiao Li WU Ming Tian LI and Yong Xiang MA (Department of Chemistry, lanzhou university, lanzhou, 730000.)

Three new aroylhydrazones containing norbornene group and their copper(Ⅱ) complexes have been synthesized and characterized by elemental analyses, electrolytic conductance, IR spectra, magnetic susceptibility and IGA...

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Anticancer Drugs ( Ⅳ )——New Derivatives of Podophyllotoxin

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Chemical Research in Chinese Universities 1993年第2期9卷 116-120页

作者： TIAN Xuan, LI Jin-xin, ZHANG Ya-li CHEN Yao-zu (National Laboratory of Applied Organic Chemistry, lanzhou university, lanzhou, 730000)LI Wen-guang (Department of Pharmacology, lanzhou Medicine College, lanzhou, 730000)

Four new derivatives of podophyllotoxin, N'-podophyllic acid-N-[3-(2, 2, 5, 5-te-tramethyl-pyrrolinenyloxy)] semicarbazide(GP-11, 6), podophyllic acid [3-(2,2,5,5-te-tramethyl-pyrrolinenyloxy)]hydrazone (GP-12, 7), podophyllic acid-[4-(2, 2, 6, 6-tetramethyl-1-hydroxy piperidine)]hydrazone(GP-1-OH, 8) and podophyllic acid[4-(2,2, 6, 6-tetramethyl piperidine)]hydrazone(GP-1-H, 9) were synthesized. The inhibition effect of the four new compounds on L-1210 cells were determined. The antitumor activity and toxicity of GP-1(2), GP-1-OH(8), GP-1-H(9) and VP-16-213(1) were discussed.

关键词： Podophyllotoxin Anticancer drugs Nitroxyl radical

A STUDY ON CRYSTAL STRUCTURE AND ANTITUMOR ACTIVITY OF 3, 6-DICHLOROFLUORAN

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Chinese Science Bulletin 1989年第21期34卷 1789-1794页

作者：王流芳任艳平王奇光何凤英王淇金大年张培琰 Department of Chemistry Lanzhou University Lanzhou 730000 PRC Analysis and Testing Center of Gansu Province Lanzhou 730000 PRC lanzhou Institute of Chemical Physics Academia Sinica Lanzhou 730000 PRC Department of Pharmacology Lanzhou Medical College Lanzhou 730000 PRC

In stead of fluorescein dibenzene-sulfonate, the title compound (I)was accidentally obtained through the reaction of fluorescein with benzene sulfonyl chloride. The crystal

关键词： 3, 6-dichlorofluoran crystal structure cytocidal effect colony formation

NEW SESQUITERPENES FROM LIGULARIA VEITCHIANA

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Chinese Chemical Letters 1993年第4期4卷 323-326页

作者： Yu ZHAO Zhong Jian JIA Institute of Organic Chemistry,State Key Laboratory of Applied Organic Chemistry at lanzhou university,lanzhou 730000.

Two new eremophilane derivatives and one new nor-sesquiterpene were isolated from Ligularia *** structures were elucidated by spectroscopic methods and 2D-NMR tech- niques and shown to be 1β,10β-epoxy-6β-(2′—semialdehyde acetal hydroxymethylacryloyloxy)- 8β-ethoxy-eremophil-7(11)-en-12,8α-olide(1),1β-hydroxy-Δ~6,Δ~9-8-oxo- eremophil-(12)-oic-acid(2)and 1β-hydroxy-Δ~6,Δ~9-8-oxo-11-nor-11-hydroxy- eremophiladiene(3).

关键词： ppm NEW SESQUITERPENES FROM LIGULARIA VEITCHIANA

Studies on macrocyclic diterpenoids Ⅴ.Synthesis of(±)-sarcophytol-A benzyl ether

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Chinese Journal of Chemistry 1993年第2期11卷 159-163页

作者： LI,Wei-Dong LI,Ying MAO,Jian-Min LI,Yu-Lin State Key Laboratory of Applied Organic Chemistry,lanzhou university,lanzhou 730000

The title compound,sarcophytol-A benzyl ether has been synthesized through 13 steps by employing acetone and geraniol as starting *** key steps in the synthesis were double bond migration reaction of allylic alcohols 5 and 6,phase transfer catalytic coupling (PTC)reaction of Ⅱ with 7 and the cyclization reaction of dicarbonyl acyclic precursor induced by TiCl_3-AlCl_3(3:1)/Zn-Cu system.

关键词： Synthesis of Studies on macrocyclic diterpenoids sarcophytol-A benzyl ether