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Two New Compounds from Melanosciadum pimpinelloideum H. Boiss

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Chinese Chemical Letters 2001年第4期12卷 333-334页

作者： Yi ZHOU Guo Lin ZHANG Bo Gang LI yao zu chen chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041 Chemistry Department Zhejiang UniversityHangzhou 310027 National Key Laboratory of Applied Organic Chemistry Lanzhou 730000

Two new compounds, melanochromone and 2-ethoxyl-2-(4-hydroxyphenyl)ethanol. were isolated from the whole plants of Melanosoiadum pimpinelloideum II. Boiss. The known compounds isolated were 1-(4-hydroxyphenyl)-1.2ethanediol. tymine. cimifugin, umtatin. bergenin. daucosterol and stigmasterol. Their structures were determined on the basis of spectral data.

关键词： Melanosciadum pimpinelloidum melanochromone 2-ethoxyl-2-(4-hydroxyphenyl) ethanol

The Synthesis of 1-Aryl-5-Fluorouracil

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Chinese Chemical Letters 2000年第10期11卷 865-866页

作者： Jin Zong YOU Shao Yuan chen Omar ISHRUD Yan Guang WANG yao zu chen Department of Chemistry Zhejiang UniversityHangzhou 310027 National Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000

A series of new type substituted 5-fluorouracil derivatives, 1-aryl-5-fluorouracil (4a-4f), were synthesized via diaryliodonium salts and the structure of the title compound was finally confirmed by IR, UV. H-1-NMR. M... 详细信息

关键词： synthesis 1-aryl-5-fluorouracil

Two New Diterpenoids from Isodon rubescens

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Chinese Chemical Letters 2000年第1期11卷 43-44页

作者： Bao Lin LI Shao Nong chen Zhi Xian SHI Xuan TIAN yao zu chen National Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000 Shanghai Institute of Materia Medica Academia SinicaShanghai 200031 Northwest Plateau Institute of Biology Academia SinicaXining 810001

Two new diterpenoids taibairubescensin A (1) and B (2) have been isolated from Isodon rubescens. The structures of compound 1 and 2 were elucidated as 2 beta,3 beta-diacetoxy-11 beta,13 alpha-dihydroxy-ent-kaur- 16-en-15-one (1) and 3 beta,11 beta-diacetoxy-2 beta,6 alpha-dihydroxy-ent-kaur-16-en-15-one (2) on the basis of spectroscopic analysis.

关键词： Isodon rubescens taibairubescensin A taibairubescensin B ent-kaurene diterpenoids

A Novel Approach for Determining the Orientation of 3-Hydroxyl Group of Some Steroids by CIMS

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Chinese Chemical Letters 1999年第2期10卷 143-144页

作者： Yuan Jiang PAN yao zu chen(Department of Chemistry, Zhejiang University, Hangzhou 310027) Department of Chemistry Zhejiang University Hangzhou 310027 China

Trimethylchlorosilane was used as a stereoselective reagent to determine the e or a orientation of 3-hydroxyl group of some steroids by chemical ionization mass spectrometry.

关键词： orientation of 3-hydroxyl group steroids mass spectrometric determination

Study on the Structure of Supramolecular Inclusion Complex of β-Cyclodextrin with Retinoic Acid

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Chinese Chemical Letters 2001年第4期12卷 317-320页

作者： Yan Ling ZHANG Wei Sheng LIU Yang LI Xue Yi MA yao zu chen National Laboratory of Applied Organic Chemistry Department of ChemistryLanzhou UniversityLanzhou 730000 Department of Chemistry Zhejiang UniversityHangzhou 310027

Inclusion compound of retinoic acid with (-cyclodextrin was prepared by coprecipitating method, the structure of resulting product was studied by elemental analysis, differential scanning caloriemetry(DSC) analysis, FT-IR spectroscopy and X-ray diffractometry, and the formed supramolecule self-assembles in aqueous solution according to molar ratio 2:1 of host-guest.

关键词： Retinoic acid β-cyclodextrin Inclusion complex structure

Two New Xanthone Glycosides from Swertia Tetraptera

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Chinese Chemical Letters 2001年第5期12卷 433-434页

作者： Zhi Xin LIAO Yu Lin LI Ming Kui WANG Li Sheng DING yao zu chen State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000 Northwest Plateau Institute of Biology Chinese Academy of SciencesXining 810001 chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041

Two new xanthone glycosides, tetraswerosides A and B, were isolated from the whole plant of Swertia tertraptera. Their structures were determined as 3-O-beta -D-glucopyranosyl-1-hydroxy-4,7-dimethoxyxanthone and 3-O-[... 详细信息

关键词： Swertia tetrapetra xanthone glycoside tetraswerosides A and B.

SYNTHESIS　OF　4－S－（5″－ALKYL－4″－AMINO－1″，2″，4″－TRIAZOLE－3″－YL）－4－DEOXY－4′－DEMETHYL－EPIPODOPHYLLOTOXIN　ANALOGUES

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Chinese Chemical Letters 1995年第5期6卷 361-362页

作者： Kuan Ke LU Fang Min LIU yao zu chen(Department of Chemistry, Lanzhou University,Lanzhou,730000) Lanzhou Univ Dept Chem Lanzhou 730000 Peoples R China

Seven title compounds were synthesized by condensation ot 4′-demethylepipodophyllotoxin With 5-alkyl-4-amino -3-mercapto -1,2,4- trizoles in the presence of CF3COOH(TFA).

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A Facile Synthesis of (-)-5_αH,7β,10_α-Eudesmane-3,1 1-diene

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Chinese Chemical Letters 1996年第12期7卷 1081-1082页

作者： Ning ZOU Dong Liang chenG Xin Fu PAN yao zu chen(Department of Chemistry, Lanzhou University, Lanzhou, Gansu 730000) Department of Chemistry Lanzhou University Lanzhou Gansu 730000

s: The convenient synthesis of (-)-5αH.7β 10α-eudesmane-3. 11-dielle 1 has been achieved in four steps starting from R-(-)-carvone. The key step is the reductive deoxygenation of α,β-unsaturated tosylhydrazone to... 详细信息

关键词： A Facile Synthesis of Eudesmane-3,1 1-diene H,7

Two New Sesquiterpenes from Euonymus phellomana Loes.

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Chinese Chemical Letters 2000年第4期11卷 331-332页

作者： Hong WANG Xuan TIAN Li YANG yao zu chen (National laboratory of Applied Organic Chemistry, Lanzhou University. Lanzhou 730000) Natl. Lab. of Appl. Organ. Chemistry Lanzhou University Lanzhou 730000 China

Two new beta-dihydroagarofuran sesquiterpenes were isolated from Euonymus phellomana Loes. and their structures were established on the basis of spectral analysis.

关键词： Euonymus phellomana Loes. beta-dihydroagarofuran sesquiterpenes