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Studies on the Total Synthesis of Pseudolaric Acid A Stereocontrolled Synthesis of the Seven-membered Lactone

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chinese Chemical Letters 1999年第4期10卷 281-284页

作者： You Hong HU li Gong OU Xi Lu WANG Dong Lu BAI(Shanghai institute of materia medica,chinese Academy of Sciences. 294 Taiyuan Road, Shanghai 200031) chinese Acad Sci Shanghai Inst Mat Med Shanghai 200031 Peoples R China

The lactone 16 was obtained stereo- and regioselectively by a reaction sequence of 9 steps in 21% overall yield.

关键词： Pseudolaric acid A stereocontrol synthesis seven-membered lactone

N-Arylindne 1,4-Cycloaddition *** of Substituted Hexahydrofurol[3,2-c]quinolines

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chinese Chemical Letters 1998年第11期9卷 983-985页

作者： Jun ZHAO Shu Feng CHEN Xiao Tian liANG (institute of materia medica,chinese Academy of medical Sciences & Peking Union medical College,Beijing 100050) institute of materia medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

Lewis acid catalyzed cycloaddition reactions of N-arylideneaniline Ⅰ with 2,3-dihydrofuran Ⅱ gave a pair of epimers d1-2, 3, 3a, 4, 5, 9b-hexahydro-4-arylfuro [3,2-c]quinolines Ⅲ and Ⅲ) and a few of their correspo... 详细信息

关键词： Cycloaddition reaction preparation ouinoline

Synthesis of 2S-Hydroxymethyl-3R, 4R-dihydroxypyrrolidine

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chinese Chemical Letters 1999年第8期10卷 651-652页

作者： Zhen CHEN Ren Yun WANG li lian ZHU Xiao Tian liANG (institute of materia medica. Peking Union medical College) (The chinese Academy of medical Sciences, Bejing 100050) chinese Acad Med Sci Inst Mat Med Peking Union Med Coll Beijing 100050 Peoples R China

The sythesis of 2S-hydroxymethyl-3R, 4R-dihydroxypyrrolidine from D-arabinose was described in this paper.

关键词： polydroxylated pyrrolidine 2S-hydroxymethyl-3R 4R-dihydroxypyrrolidine D-arabinose

TEUPERNIN A,B AND C,THREE ENT-CLERODANE DITERPENOIDS FROM TEUCRIUM PERNYI FRANCH

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chinese Chemical Letters 1991年第7期2卷 539-542页

作者： Di An SUN Guang Yi li institute of materia medica,chinese Academy of medical Sciences,Beijing 100050

Three furanoid ent-clerodane diterpenoids,teupernin A,B and C have been isolated from the acetone extract of Teucrium pernyi *** structures were established by spectroscopic means(UV,IR,MS,~1H NMR,^(13)C NMR,H-H COSY,... 详细信息

关键词： Pro NOE TEUPERNIN A,B AND C,THREE ENT-CLERODANE DITERPENOIDS FROM TEUCRIUM PERNYI FRANCH La

The Oxirane Ring Opening of 2,3-endo-epoxybicyclo[3. 2 .0] hept-6-one by Amines at Alumina Surface

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chinese Chemical Letters 1998年第6期9卷 513-514页

作者： Yan Mei HE Guo Hao XIE Ai lian ZHENG Yuan liu WU(institute of materia medica, chinese Academy of medical Sciences, Bejing 100050) chinese Acad Med Sci Inst Mat Med Beijing 100050 Peoples R China

Stereospecific (trans) and regioselective nucleophilic opening of the title epoxide (I) by different amines at the alumina surface are described.

关键词： Oxirane Ring Opening aliphatic amines aromatic amines

Studies on Agarofurans Ⅰ. New Synthesis of Nor-Ketoagarofuran and 4-Hydroxydihydroagarofuran

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chinese Chemical Letters 1997年第1期8卷 25-26页

作者： Wu-Yan ZHANG Ji Yu GUO Xiao Tian liANG(institute of materia medica, chinese Academy of medical Sciences &Peking Union medical College, Beijing 100050) institute of materia medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

Nor-ketoagarofuran (1), one of the furanoids isolated from grnd Oil, has been Synthesed in a preprative scale in high yield from olefin 3 in 3 steps. Reaction of norketoagarofuran (1) with CH3MgI afforded 4 (2), an an... 详细信息

关键词： KBr Studies on Agarofurans New Synthesis of Nor-Ketoagarofuran and 4-Hydroxydihydroagarofuran

Total Synthesis of (±)Hinesol

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chinese Chemical Letters 1998年第4期9卷 353-356页

作者： Ping XIE Shu Feng CHEN Xiao Tian liANG(institute of materia medica, chinese Academy of medical Sciences& Peking Union medical College, Beijing 100050) institute of materia medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

Stereoselective total synthesis of (±)hinesol 1 was achieved from readily available stafting materials and thorough mild reaction conditions. The structure of synthetic hinesol was confirmed by chemical transformation.

关键词： hinesol stereoselective agarospirol baimuxinic acid Dauben's synthesis

Synthesis of 11-demethyl and 6, 6,11-demethyl Calanolide A

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chinese Chemical Letters 1997年第10期8卷 859-860页

作者： Chun Mei ZHOU lin WANG Zhi Zhong ZHAO (institute of materia medica, Peking Union medical College & chinese Academy of medical Sciences, Bejing, 100050) chinese ACAD MED SCI BEIJING 100050PEOPLES R CHINA BEIJING UNION MED COLL INST MAT MEDBEIJING 100050PEOPLES R CHINA

Synthesis of 11-demethyl and 6, 6, 11-demethyl calanolides A (6-9) have been carried out by a four-step reaction sequence using a simple approach in order to investigate the structural requirements necessary for antiv... 详细信息

关键词： ppm HNMR MHz Synthesis of 11-demethyl and 6 demethyl Calanolide A

Total Synthesis of (+)Villosol

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chinese Chemical Letters 1997年第2期8卷 103-106页

作者： Ping XIE Shu Feng CHEN Xiao Tian liANG(institute of materia medica, chinese Academy of medical Sciencesand Peking Union medical College, Beijing 100050) chinese ACAD MED SCI INST MAT MEDBEIJING 100050PEOPLES R CHINA BEIJING UNION MED COLL BEIJING 100050PEOPLES R CHINA

The total synthesis of (+)villosol was accomplished by using the readily available (-)2 as starting material.

关键词： HNMR IR cm KBr Total Synthesis of Villosol MHz