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First Synthesis of (±)-3-(5-Hyd roxy-4-Methyl-7-Isopropyl-3E,7-Octadienyl)- △~2-Butenolide

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Chinese chem.cal Letters 1997年第5期8卷 411-412页

作者： Jin QU Wei Dong LI Jing Ll Yu Lin LI(National Key lab.ralory of appl.ed organ.c chem.stry and Institute of organ.c chem.stryLanzhcn Umversity Lanzhou 730000) natl. Key lab. of appl. organ. chem. Institute of Organic Chemistry Lanzhcu University Lanzhou 730000 China

An efficIent total synthesis of (±)-3-(5-hydroxy-4-methyl-7 △-butenolide, a new fi1n1esane-b;.Fed homosesquiterPeIle lactone. starting from geraniol through eightsteps are described.

关键词： First Synthesis of Li Butenolide Hydroxy-4-Methyl-7-Isopropyl-3E,7-Octadienyl

Two New Sesquiterpenes from Euonymus phellomana Loes.

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Chinese chem.cal Letters 2000年第4期11卷 331-332页

作者： Hong WANG Xuan TIAN Li YANG Yao Zu CHEN (National lab.ratory of appl.ed organ.c chem.stry, Lanzhou University. Lanzhou 730000) natl. lab. of appl. organ. chem.stry 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

Detection of Claisen Rearrangement Occurring in Allyl Phenyl Ether by in situ GC/MS

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Chinese chem.cal Letters 1998年第4期9卷 381-384页

作者： Jian Jun ZHAI Wei YING Fan Zhi ZHA0 Yao Zu CHEN(National lab.ratory of appl.ed organ.c chem.stry at Lanzhou University, Lanzhou 730000) natl. lab. of appl. organ. chem.stry Lanzhou University Lanzhou 730000 China

We report here a new strategy for revealing the Claisen rearrangement of allyl phenyl ether occurring in the gas phase by in situ GC/MS technique. The Claisen rearrangement has been observed when allyl phenyl ether passed through the capillary column at certain temperatures. The relative proportion of rearrangement products is dependent on the temperature of the capillary column and the substituents on the phenyl ring.

关键词： in situ GC/MS allyl phenyl ether Claisen rearrangement

Synthesis of 3-(3-Hydroxypropyl)-phthalide and Pedicellosine

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Chinese chem.cal Letters 1999年第2期10卷 109-110页

作者： Qiang GAO Shao Bai LI(National lab.ratory of appl.ed organ.c chem.stry, Lanzhou University, LanZhou 730000) natl. lab. of appl. organ. chem.stry Lanzhou University LanZhou 730000 China

3-(3-hydroxypropyl)-phthalide 1, a phthalide isolated from the flowers of G. pedicellata Wall. has been synthesized in high yield from 2-carboxybenzaldehyde 3 in 2 steps. Reaction of 1 with 2,3-dihydroxybenzoic acid a... 详细信息

关键词： 3-(3-hydroxypropyl)-phthalide pedicellosine synthesis

Novel Reaction of Nitrosonium(NO^+) with Hantzsch Dihydropyridines

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Chinese chem.cal Letters 1999年第12期10卷 991-994页

作者： Wang CHEN Mei Zhong JIN Zhong li LIU Long Min WU(National lab.ratory of appl.ed organ.c chem.stry, Lanzhou University, Lanzhou 730000) natl. lab. of appl. organ. chem.stry Lanzhou University Lanzhou 730000 China

The oxidation on 1,4-substituted Hantzsch 1,4-dihydropyridines with nitrosonium tetrafluoroborate (NO+BF4-) in acetonitrile gave Hantzsch pyridines in good yields. In some cases the dealkylation occurred. The evidence... 详细信息

关键词： nitrosonium Hantzsch dihydropyridines.

A New Isopimarane Diterpene from Nepeta prattii

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Chinese chem.cal Letters 1999年第7期10卷 573-574页

作者： Zhen Fu HOU Li YANG Yong Qiong TU Yu LI(National lab.ratory of appl.ed organ.c chem.stry Lanzhou University, Lanzhou 730000) natl. lab. of appl. organ. chem.stry Lanzhou University Lanzhou 730000 China

A new isopimarane diterpene, isopimar-15-en-3 beta,8 beta,20-triol, was isolated from Nepeta prattii. Its structure was elucidated by spectral methods (EIMS, 1D and 2D NMR).

关键词： Nepeta prattii isopimarane diterpene prattol

Synthesis and Biological Activities of ω-Heterocyclyl-ω-(1H-1,2,4-triazol-1-yl) Acetophenones

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Chinese chem.cal Letters 1999年第5期10卷 361-364页

作者： Chang Hu CHU Xiao Wen SUN Zi Yi ZHANG Zhi Chun LI Ren An LIAO(Department of chem.stry, National lab.ratory of appl.ed organ.c chem.slry,Lanzhou University. Lanzhou 730000State Key lab.ratory of Elemento-organ.c chem.stry. Nankai University. Tianjin 300 Department of chem.stry Natl. Lab. of Appl. Organ. Chemistry Lanzhou University Lanzhou 730000 China State Key lab. Elemento-organ. chem. Nankai University Tianjin 300071 China

A series of ω-heterocyclyl-ω-(1H-1,2,4-triazol-1-yl) acetophenones have beensynthesized. All the compounds were characterized by elemental analysis and spectral data Thepreliminary biological test showed that some o... 详细信息

关键词： 1H-1,2,4-triazole heterocyclic group biological activity

A Facile Synthesis of the C-11 isomer of 5-epi-Kudtriol

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Chinese chem.cal Letters 2000年第2期11卷 111-112页

作者： Gang ZHOU1 Xiao Lei GAO1 Zhe ZHANG1 Yu Lin LI1 Zhi Zhen SHANG2 Ren An LIAO2 (1National lab.ratory of appl.ed organ.c chem.stry and Institute of organ.c chem.stry, Lanzhou University, Lanzhou 730000 2State Key lab.ratory of of Elemento-organ.c chem.s natl. lab. of appl. organ. chem.stry Institute of Organic Chemistry Lanzhou University Lanzhou 730000 China State Key lab. Elemento-organ. chem. Nankai University Tianjin 300071 China

The C-ll isomer of natural trihydroxyl sesquiterpene 5-epi-kudtriol has been synthesized starting from (+)-dihydrocarvone via asymmetric dihydroxylation as a key step.

关键词： asymmetric synthesis asymmetric dihydroxylation 5-epi-kudtriol

Photooxidation of α-Tocopherol in Micelles. A New Singlet Oxygen Oxidation Product

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Chinese chem.cal Letters 1998年第9期9卷 823-826页

作者： Wei YU Li YANG Zhong Li LIU (National lab.ratory of appl.ed organ.c chem.stry, Lanzhou UniversityLanzhou, Gansu 730000) natl. lab. of appl. organ. chem.stry Lanzhou University Lanzhou Gansu 730000 China

Methylene blue sensitized singlet oxygen oxidation of dl-α-tocopherol in dodecylsulfate (SDS) or cetyl trimethyl ammonium brondde (CTAB) ndcelles led to the formation, besidesα-tocopherol quinone and its epoxide, of a hitherto unknown spiro compound 6-hydroxy-2,6,8,9-tetramethyl-2-phytyl- 1-oxaspiro [4, 5] dec -8 - en - 7, 10-dione.

关键词： α-tocopherol singlet oxygen 6-hydroxy-2,6,8,9-tetramethyl-2-phytyl-1-oxaspiro-dec-8-en-7,10-dione