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Novel Access to Organostannane Compounds under Ultrasound Irradiation

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Chinese Journal of Chemistry 2004年第11期22卷 1382-1383页

作者：赵志全孙彬彭立增李瀛李裕林 Lunan Pharmaceutical Co. Ltd. Linyi Shandong 276003 China National Laboratory of Applied Organic Chemistry Lanzhou University Gansu Lanzhou 730000 China

A simple and efficient procedure has been developed for the synthesis of organostannane compounds by one-pot reaction of stannane halides, magnesium turnings and organic halides in the presence of 1,2-dibromoethane un... 详细信息

关键词： organostannane one-pot reaction ultrasound irradiation

A Short and Stereoselective Synthesis of the (-)-(5R,6S)-6-Acetoxy-hexadecane-5-olide

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Chinese Chemical Letters 2004年第10期15卷 1177-1178页

作者： BinSUN LiZengPENG XueSongCHEN YuLinLI YingLI StateKeyLaboratoryofAppliedOrganicChemistry InstituteofOrganicChemistryLanzhouUniversityLanzhou730000 LunanPharmaceuticalCo.Ltd. Linyi276003

R, 6S)-6-Acetoxyhexadecan-5-olide 1, a natural mosquito attractant pheromone, was synthesized from readily available aldehyde 2 and cyclopentanone 3 using L-proline-catalyzed asymmetric aldol reaction as the key step.

关键词： Acetoxyhexadecan-5-olide Baeyer-Villiger oxidation aldol reaction L-proline.

A Concise and Stereoselective Synthesis of Cathasterone′s Side Chain

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Chemical Research in Chinese Universities 2005年第3期21卷 372-375页

作者： MEITian-sheng LULi LIUHua-wei PENGLi-zeng ZANGTao LIYu-lin StateKeyLaboratoryofAppliedOrganicChemistry InstituteofOrganicUhemistryLanzhouUniversityLanzhou730000P.R.China LunanPharmaceuticalCo. LtdLinyi276003P.R.China

Brassinolide(compound 1) and cathasterone(compound 2)(Scheme 1),whichis the biosyn-thetic precursor of compound 1,are a new type of promoting materials for plant growh[1.2].……

关键词： Brassinolide Cathasterone Aldol

Novel Phenomenon of Oxygen-to-oxygen Silyl Migration in Directed Aldol Reaction

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Chinese Chemical Letters 2005年第3期16卷 290-292页

作者： ZhiQuanZHAO LiZengPENG YuLinLI LunanPharmaceuticalCo. Ltd.LinyiShandong276003 NationalLaboratoryofAppliedOrganicChemistry InstituteofOrganicChemistryLanzhouUniversityLanzhou730000

The phenomenon of migration of the silyl groups from α-oxygen to β-oxygen in sodium aldol reaction was observed for the first time in this paper.

关键词： Silyl migration α-silyloxy ketone aldol reaction.

First-principle study on the physical properties of ultra-incompressible ReB_2

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 284-290页

作者： Chunlei WANG Qiuju SUN Xuanyu SONG Benhai YU College of Physics and Electronic Engineering Xinyang Normal University Xinyang 464000 China

The elastic and physical characteristics of ReB2 crystal have been predicted through a method of density functional theory within the generalized gradient approximation （GGA）. Five independent elastic constants are C11=662 GPa, C12=150 GPa, C13=146 GPa, C33=1090 GPa and Caa=263 GPa. The bulk modulus （B）, shear modulus （G）, Young＇s modulus （E）, Poisson＇s ratio （γ） and the ratio of linear com- pressibility coefficient along the a- and c-axis crystal direction （Ka/Kc） are 356 GPa, 305 GPa, 711 GPa, 0.167 and 1.758, respectively. In addition, the dependence of bulk modulus （B） on temperature （T） and pressure （p） as well as the coefficient of thermal expansion （αL） at various temperatures are evaluated and discussed. The coefficient of thermal expansion is consistent with the famous Grüneisen＇s law when the temperature is less than 1500 K. Our results agree well with the other experimental results.

关键词： Rhenium diboride Density functional calculations Bulk modulus Coefficient of thermal expansion

Synthesis of 6(E)-Geranylgeraniol-19-oic Acid

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Chinese Chemical Letters 2002年第4期13卷 290-291页

作者： ShuHuaLI YuLinLI 等 NationalLaboratoryofAppliedOrganicChemistryandInstituteofOrganicChemistryLanzhouUniversity Lanzhou730000 NationalLaboratoryofAppliedOrganicChemistryandInstituteofOrganicChemistryLanzhouUniversity Lanz

Facile synthesis of 6(E)-geranylgeraniol-19-oic acid 1, a naturally occurring alicyclic diterpene acid, by a Horner-Wadsworth-Emmons olefination of two readily available fragments 2 and 3, is described.

关键词： Horner-Wadsworth-Emmons reaction 6(E)-geranylgeraniol-19-oic acid synthesis.

First principle study on the elastic and thermodynamic properties of TiB_2 crystal under high temperature

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Chinese Physics B 2009年第3期18卷 1248-1252页

作者：王春雷余本海霍海亮陈东孙海滨 College of Physics and Electronic Engineering Xinyang Normal University Discipline Inspection Commission Xinyang Normal University

This paper predicts the elastic and thermodynamic characteristics of TiB2 crystal through the method of density functional theory within the generalized gradient approximation （GGA）. The five independent elastic constants （Cij）, the bulk modulus （B0）, the dependence of bulk modulus （B0） on temperature T and pressure P and the coefficient of thermal expansion （αL） at various temperatures have been evaluated and discussed. According to calculation, the bulk modulus will increase with increasing pressure while decrease with the increasing temperature. The coefficient of thermal expansion is consistent with the famous Griineisen＇s law when the temperature is not too high. The obtained results agree well with the experimental and other theoretical results.

关键词： titanium diboride density functional calculations bulk modulus coefficient of heat expansion

First Total Synthesis of (±)-3-(5-Hydroxy-4,7,8-trimethyl-3E,8-nonadiene)-△^(2)-butenolide

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Chinese Chemical Letters 2004年第2期15卷 141-142页

作者： Tao ZHANG1] Yi LI1] Li Zeng PENG1] Hua Wei LIU1] Tian Sheng MEI1] Yu Lin LI1] National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry Lanzhou University Lanzhou 730000

An efficient total synthesis of ()-3-(5-hydroxy-4,7,8trimethyl3E,8nonadiene)2 butenolide 1, an unusual homosesquiterpene, starting from geraniol 2 through ten steps are described.

关键词： Δ2-butenolide Homosesquiterpene Total synthesis

Dienone-phenol Rearrangement of C-9 Oxygenated Decalinic Dienone and Analogs through B-Ring Cleavage

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Chinese Chemical Letters 2003年第7期14卷 689-692页

作者： Jing Chun CHEN Gang ZHOU Wei Dong LI Yu Lin LI National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry Lanzhou UniversityLanzhou 730000

Dehydrogenation of 9-hydroxy decalinic enones and analogs with DDQ resulted in a formal dienone-phenol type rearrangement via B-ring cleavage, while the corresponding dienone acetates underwent base-catalyzed formal d... 详细信息

关键词： Dienone-phenol rearrangement decalinic dienone dehydrogenation DDQ.