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Knoevenagel Condensation of Acetylacetone with AldehydesCatalyzed by a New Catalyst Indium Trichloride

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Chinese Chemical Letters 1998年第2期9卷 123-124页

作者： Wang, L zhang, ym Hangzhou Univ Dept Chem Hangzhou 310028 Peoples R China

The Knoevenagel condensation of acetylacetone with aldehydes catalyzed by indium trichloride was carried out at room temperature in acetonitrile to give aryl- or alkylideneacetylacetones in moderate to good yields.

关键词： Knoevenagel condensation indium trichloride acetylacetone aldehyde

STRUCTURE　OF　GANODERIC　ACID　DM，A　NEW　TRITERPENOID　FROM　THE　FRUITING　BODY　OF　GANODERMA　LUCIDUM

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Chinese Chemical Letters 1995年第12期6卷 1051-1052页

作者： Cai, H Wang, FS Yang, JS zhang, ym Univ Agr & Anim Sci PLA Changchun 130062 Peoples R China Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

A new lanostane-type triterpenoid, ganoderic acid DM was isolated from the cultured fruiting body of G. lucidum. The structure of ganoderic acid DM (1) was determined by spectral data. It was ldentifled as 3. 7-dioxo-... 详细信息

关键词： ACID BODY DM

SYNTHESIS　OF　N－ARYL－4－METHYLPHENOXYACETAMIDES　BY　MEANS　OF　LIQUID－LIQUID　PHASE　TRANSFER　CATALYSIS

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Chinese Chemical Letters 1995年第3期6卷 205-208页

作者： Wei, TB Chen, JC zhang, ym Wang, LL NW Normal Univ Dept Chem Lanzhou 730070 Peoples R China Chinese Acad Sci Lanzhou Inst Chem Phys Lanzhou 730000 Peoples R China

The title compounds 3a - 3n were prepared with high yields via the reaction of 4-methylphenoxyacetyl chloride with various substituted aromatic ammes under the condition of liquidliquid phase transfer catalysis using...

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Ultrahigh-pressure (4.5-5.5 GPa) experimental research on pyroxene-garnet transition and its significance

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Chinese Science Bulletin 1997年第17期42卷 1456-1459页

作者： Fan, QC Liu, RX Xie, HS zhang, ym Lin, ZR Institute of Geology State Seismological Bureau Beijing China Institute of Geochemistry Chinese Academy of Sciences Guiyang China

Al-PYROXENE in nature may be regarded as garnet solid solution in Al-free pyroxene. The transition from Al-pyroxene to garnet + Al-poor pyroxen can be carried out under high-pressure conditions. Ultrahigh-pressure experiment on pyroxene-garnet transition was carried out in this work using natural soecimens to exolain the genesis of garnet peridotite.

关键词： pyroxene-garnet transition ultrahigh-pressure experiment garnet peridotite genesis.

A NEW TRITERPENOID FROM THE FUNGUS GANODERMA LUCIDUM

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Chinese Chemical Letters 1995年第12期6卷 1049-1050页

作者： Wang, FS Cai, H Jing, ZX Yang, JS zhang, ym Univ Agr & Anim Sci PLA Changchun 130062 Peoples R China Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

The structure of a new triterpenoid, named gonolactone A, isolated from the fruiting body of Ganoderma lucidum,was determined by spectroscopic methods. This compound was identified as 7 beta -hydroxy-3. 11,15-trioxo-l...

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Measurement of electrical conductivity of 0.001 mol NaCl solution under high pressures

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Chinese Science Bulletin 1997年第18期42卷 1563-1566页

作者： Zheng, HF Xie, HS Xu, YS Song, MS Guo, J zhang, ym Department of Geology Peking University Beijing China Institute of Geochemistry Chinese Academy of Sciences Guiyang China

The experiments were carried out in a YJ-3000 ton press fitted with a wedge-type cubic anvil. The samples were pressed using pyropgyllite as the pressure medium. The conductance cell for the experiments was made of Te... 详细信息

关键词： electrical conductivity high pressure NaCI solution.

P-wave velocities of alkaline olivine basalt at high pressure and temperature and its controlling factors

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Chinese Science Bulletin 1997年第9期42卷 761-764页

作者： Song, MS Xie, HS zhang, ym Hou, W Xu, J Xu, YS Earth’s Interior Material Laboratory Institute of Geochemistry Chinese Academy of Sciences Guiyang China Institute of Earth Science Academia Sinica Taibei China

SEISMIC wave inversion is one of the most important means for us to recognize the compositionand structure of the Earth’s *** the experimental techniques of elastic wave ve-locity measurement at in situ high pressure... 详细信息

关键词： high pressure and temperature alkaline olvine basalt P-wave velocity softening effect phase transformation.

EURYCARPIN A,A NEW ISOFLAVONE FROM GLYCYRRHIZA EURYCARPA

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Chinese Chemical Letters 1995年第6期6卷 477-478页

作者： zhang, ym Xu, XD Hu, BH Liu, Q Hou, CY Liu, YL Yang, JS Chinese Acad Med Sci Inst Med Plant Dev Beijing 100094 Peoples R China

A new isoflavone designated as eurycarpin A(I) has been isolated from the root of Glycyrrhiza eurycarpa P. C. Li. Based on spectroscopic data, its structure was established as 7, 2',4'-trihydroxy-3'(3,3-dimethylallyl)...

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INTERLAYER COUPLING AND FERROMAGNETIC RESONANCE IN Fe-Si/Cr MULTILAYERS

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Acta Metallurgica Sinica(English Letters) 1996年第4期9卷 283-286页

作者： S.S.Yan: YH Liu: X.D Ma,ym. zhang and L.M Mei(Department of physics, shandong University, Jinan 250100, China )

Fe-Si/Cr multilayers with amorphous Fe-Si magnetic layers and Cr nonmagnetic layers were prepared by an rf-sputtering *** the thickness of the Cr layers varies from 0.5 to 6 nm, the interlayer coupling oscillates periodically from ferromagnetic to antiferromagnetism. For each sample only one wide uniform resonance peak is detected by the ferromagnetic resonance. The uniform resonance field Hb and the resonance line width △H_b oscillate periodically as the thickness of the Cr layers increases, which is related to the oscillation of the interlayer coupling from ferromagnetic to *** oscillation period is about 1.5nm.

关键词： multilayer interlayer coupling ferromagnetic resonance