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A new depsidone from Usnea diffracta

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Chinese Chemical Letters 2009年第2期20卷 187-189页

作者： Huan yang Qi Yuan Peng Jin yan ping shi Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

A new depsidone, diffractione A （1）, as well as six known phenolic compounds （2-7） were isolated from Usnea diffracta. Their structures were elucidated by 1D and 2D NMR spectroscopy together with HRESIMS analysis.... 详细信息

关键词： Depsidone Usneaceae Usnea diffracta Lichen Diffractione A

Two New Components from Serratula strangulata Iljin

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Chinese Chemical Letters 2002年第2期13卷 143-146页

作者： Jing Qiu DAI yan ping shi Li yanG Yu LI National Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000

From the alcoholic extract of the whole plants of Serratula strangulata, two new compounds, named strangusin-A (1) and strangusin-B (2) have been isolated and their structures were established by spectroscopic method.

关键词： Serratula strangulata lignan phenolic compound Compositae strangusin-A strangusin-B.

Synthesis and Crystal Structure of a 1-D Coordination Polymer {[Cu(NIT4py)_2(ip)]·6H_2O}_n

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Chinese Journal of Structural Chemistry 2006年第2期25卷 214-218页

作者： WANG Shu-ping GAO Dong-Zhao LIAO Dai-Zheng JIANG Zong-Hui yan shi-ping LI Li-Cun Department of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Structural Chemistry Fujian Instituteof Research on the Structure of MatterThe Chinese Academy of Sciences Fuzhou 350002 China

A new complex { [Cu（NIT4py）2（ip）]·6H2O }, （NIT4py=2-（4＂-pyridinyl）-4,4,5,5-tetra methylimidazoline-1-oxyl-3-oxide and ip = isophthalate dianion） has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in orthorhombic, space group Cmcm with a = 25.161（3）, b =10.045（1）, c = 15.450（2） A°, C32H48N6O14CU, Mr = 804.30, V= 3904.8（8） ,A°^3, Z = 4, De = 1.368 g/cm^3, μ（MoKa） = 0.630 mm^-1, F（000） = 1692, the final R = 0.0326 and wR = 0.0787 for 1843 independent reflections with Rint = 0.0372. Each Cu（Ⅱ） ion is four-coordinated by two carboxylate oxygen atoms and two pyridyl-N atoms from NIT4py radicals to furnish a rhombus geometry. The central Cu（Ⅱ） ion is located at an inversion center and a crystallographic two-fold axis. Each isophthalate dianion binds two Cu（Ⅱ） ions in bis-monodentate mode, leading to a 1-D chain, a＇ these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.

关键词： crystal structure nitronyl nitroxide radical copper(Ⅱ) coordination polymer isophthalate

Two New Eremophilane Sesquiterpene Lactones from Ligularia myriocephala Ling

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Chinese Chemical Letters 2005年第12期16卷 1618-1620页

作者： Jun Xi LIU Xiao Ning WEI yan ping shi Run Hua LU Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041

Two new eremophilane sesquiterpene lactones, 1β-angeloyloxy-6β, 10β-dihydroxy-8β- methoxyeremophila-7（ll）en-8α,12-olide and 1β-angeloyloxy-6β,10α-dihydroxy-8α-methoxyeremo- phila-7（ 11）en-8β, 12-olide were isolated from the extract of the whole plant of Ligularia myriocephala Ling. Their structures and stereochemistry were elucidated by various spectroscopic methods including intensive 2D-NMR techniques （COSY, gHMQC, gHMBC and ^1H-^1H NOESY） and HR-ESIMS.

关键词： Ligularia myriocephala Ling Compositae sesquiterpene lactones eremophilanolide

A Novel Hydroperoxyl Substituted Cembranolide Diterpene from Marine Soft Coral Lobophytum crassum

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Chinese Chemical Letters 2005年第11期16卷 1489-1491页

作者： Shuai Wen YIN yan ping shi Xiao Ming LI Bin Gui WANG Key Laboratory of Experimental Marine Biology Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 Graduate School of the Chinese Academy of Sciences Beijing 100039

A new cembranolide diterpene with a hydroperoxyl substitution was isolated from the marine soft coral Lobophytum crassum. The structure was elucidated on the basis of chemical and spectral methods.

关键词： Lobophytum crassum 2-hydroperoxysarcophine cembranolide diterpene.

A new phenolic lactone from the bark of Phellodendron chinense

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Chinese Chemical Letters 2009年第8期20卷 958-960页

作者： Xue Hu Li Wen Juan Zhang Huan yang Qi yan ping shi Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 China The Graduate University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100039 China

A new phenolic lactone, named phellolactone （1） was isolated from the bark of Phellodendron chinense Schneid and its structure was elucidated by means of extensively spectroscopic methods, including IR, UV, HRESI-MS and NMR techniques. ？2009 Yah ping shi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： PheUodendron chinense Rutaceac Phellolactone

Synthesis and Crystal Structure of a New One-dimensional Zn(II) Nitronyl Nitroxide Complex Bridged by Pyridine-2,4-dicarboxylate Anion

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Chinese Journal of Structural Chemistry 2006年第6期25卷 735-739页

作者： GAO Dong-Zhao LI Li-Cun LIAO Dai-Zheng JIANG Zong-Hui yan shi-ping Department of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China

A new one-dimensional （1-D） Zn（Ⅱ） nitronyl nitroxide complex bridged by pyridine-2,4-dicarboxylate anion, [Zn（NIT4Py）（2,4-PDA）（H2O）2], （NIT4Py = 2-（4′-pyridyl）-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide and 2,4-PDA = pyridine-2,4-dicarboxylate anion）, has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P21/c with a = 16.834（2）, b = 7.4376（10）, c = 18.295（3） A, β = 102.848（2）°, V = 2233.2（5） A^3, C19H23N4O3Zn, Mr = 500.78, Dc = 1.489 g/cm^3,μ（MoKa） = 1.152 mm^-1, F（000） = 1036, Z = 4, the final R = 0.0390 and wR = 0.0915 for 3234 observed reflections. In the complex, each zinc（Ⅱ） ion is six-coordinated by one nitrogen atom of the radical ligand （NIT4Py）, one nitrogen atom and two oxygen atoms of two 2,4-PDA anions and two oxygen atoms of two water molecules. Each 2,4-PDA anion bridges two Zn（Ⅱ） ions via a tridentate mode into a 1-D chain, and these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.

关键词： zinc(Ⅱ) complex nitronyl nitroxide radical crystal structure pyridine-2,4-dicarboxylic acid

Synthesis and Crystal Structure of a New Zn(II) Nitronyl Nitroxide Complex [Zn(NIT4Py)(PDA)(H_2O)_3]

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Chinese Journal of Structural Chemistry 2006年第2期25卷 224-228页

作者： GAO Dong-Zhao WANG Shu-ping CHEN Jin LI Li-Cun LIAO Dai-Zheng JIANG Zong-Hui yan shi-ping Department of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Structural Chemistry Fujian Institute of Researchon the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China

A new Zn（Ⅱ） nitronyl nitroxide complex [Zn（NIT4Py）（PDA）（HzO）3] （NIT4Py = 2-（4＇-pyridyl）-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, H2PDA = pyridine-2,5-dicarboxylic acid） has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group P2 1/c with a = 16.881（8）, b = 7.356（4）, c = 18.857（9） A°,β = 108.616（6）°, V = 2219.1 （19）A°^3 ,C 19H25N4O9Zn, Mr = 518.80, Dc = 1.553 g/cm^3, μ（MoKa） = 1.165 mm^-1, F（000） = 1076, Z = 4, the final R = 0.0269 and wR = 0.0715 for 3193 observed reflections with I 〉 2σ（I）. The complex exists as discrete mononuclear molecules and the zinc（Ⅱ） ion is six-coordinated with one radical ligand （NIT4Py）, one bidentate pyridine-2,5-dicarboxylate anion and three water molecules. A three-dimensional network structure is formed through the intermolecular interactions.

关键词： zinc(Ⅱ) complex nitronyl nitroxide radical crystal structure intermolecularinteraction

Synthesis and Magnetism of the Complexes of Hexaisothiocyanatochromate Anions with Radical Cations

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Chemical Research in Chinese Universities 1999年第1期15卷 78-80页

作者： LIU Xin LIAO Dai zheng JIANG Zong hui yan shi ping WANG Geng lin Department of Chemistry Nankai UniversityTianjin300071

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ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｏ－ｃａｌｅｄｍｅｔａｌ－ｒａｄｉｃａｌａｐｐｒｏａｃｈｈａｓｂｅｅｎｓｕｃｃｅｓｆｕｌｙｅｍｐｌｏｙｅｄｉｎｔｈｅｓｙｎｔｈｅｓｉｓｏｆｍｏｌｅｃｕｌａｒｂａｓｅｄｆｅｒｒｏｍａｇｎｅｔｓ［１］．Ｉｔｃｏｎｓｉｓｔｏ...

关键词： Synthesis Magnetism Hexaisothiocyanatochromate anion