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Efficient Syntheses of 2-Substituted Benzimidazoles and Benzoxazoles from β-Keto Esters

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Chemical Research in Chinese Universities 2011年第2期27卷 228-231页

作者： XIAO Li-wei ZHANG Min sun wen-hua Faculty of Chemistry and Material Science Langfang Teachers College Langfang 065000 P. R. China Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

An efficient synthetic method was developed to synthesize 2-substituted benzimidazoles and benzo- xazoles with β-keto esters as starting materials under mild reaction conditions, during which other functional groups ... 详细信息

关键词： Benzimidazole Benzoxazole β-Keto ester

Synthesis and Crystal Structure of an Ion-pair Supramolecular Associate 2,9-Diformyl-1,10-phenanthrolinebis-(2,6-dimethylanil)cobalt(Ⅱ) Perchlorate

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Chinese Journal of Structural Chemistry 2006年第7期25卷 861-865页

作者： LI Gang JIE Su-Yun TANG Ning sun wen-hua State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China Key Laboratory of Engineering Plastics Institute of Chemistry The Chinese Academy of Sciences Beijing 100080 China

2,9-Diformyl-l, 10-phenanthrolinebis（2,6-dimethylanil）cobalt（Ⅱ） perchlorate was synthesized and demonstrated to be [COL2][ClO4]2 by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group C2/c with a = 22.294（4）, b = 15.122（3）, c = 20.640（4） A, β = 119.618（4）°, V = 6048.9（19） A^3, C63H52Cl2CoN9O9, Mr= 1208.97, F（000） = 2504, De= 1.328g/cm^3, Z = 4, μ= 0.436, the final R = 0.0712 and wR = 0.1718 for 1734 observed reflections （I 〉 2σ（I））. In its solid state the helical polymeric chains are supramolecularly associated through intermolecular and interionic hydrogen bonding interactions.

关键词： 1,10-phenanthroline cobalt complex crystal structure hydrogen bond

Synthesis and Characterization of {2-Formyl-6-[1-(2,4,6-trimethylphenyl)]-4- chlorophenoxy}_2Ni and Its Ethylene Oligomerization

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Chinese Journal of Structural Chemistry 2005年第8期24卷 930-934页

作者： ZHANG Dong-Heng DU Jian-Long HAN Ling-Qin sun wen-hua Key Laboratory of Engineering Plastics Institute of Chemistry The Chinese Academy of Sciences Beijing 100080 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China College of Chemistry & Environmental Science Hebei UniversityChina Baoding 071002

The title nickel complex （C34H3oCl2N2NiO4, Mr = 660.21） has been synthesized and its crystal structure was determined by single-crystal X-ray structure analysis. It crystallizes in the monoclinic system, space group P21/n with a = 11.026（8）, b = 11.491（8）, c = 12.119（9） A°, β=91.328（13）°, Z= 2, V= 1535.0（19） ,A°^3, Dc = 1.428 g/cm^3, F（000） = 684 andμ（MoKa） = 0.848 mm^-1 The structure was refined to R = 0.0544 for 1813 observed reflections with I 〉 2σ（I） and wR =0.0867 for 3132 unique reflections. The molecule of the complex is high symmetrical. Ni（Ⅱ） atom is located in the symmetric center and coordinated to two phenolic oxygen and two imino nitrogen atoms, forming two six-membered rings. Upon activation with methylaluminoxane （MAO）, it is active for ethylene oligomerization.

关键词： nickel complex salicylaldimine ethylene oligomerization

Structural Characterization of Chiral Sulfido Cluster(η~5-C_5H_5) WFeCo(CO)_8 (μ_3-S)

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Chinese Journal of Structural Chemistry 1997年第1期16卷 59-63页

作者： Xu, Feng sun, wen-hua Yang, Shi-Yan Yin, Yuan-Qi Wu, Qiang-Jin State Key Lab. OXO Synthesis/S. O. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Fujian Inst. Res. Struct. of Matter Chinese Academy of Sciences Fuzhou 350002 China

The chiral sulfido cluster (η5-C5H5)WFeCo(CO)8(μ3--S) was synthesized by refluxing a solution of HFe2Co(CO)9 (μ3,--S) and (η5-C5H5)Fe(CO)3Cl in tetrahydrofuran. It was characterized by elemental analysis, IR and 1H/13C--NMR. Theproposal concerning mechanism was discussed herewith and the structure was reportedas well. Crystallographic data: Mr= 563. 85, monoclinicl P21/n(# 14); a= 8. 009(2), b= 17. 600(5), c=12. 003(4) A; β=95. 91(2)°; V= 1683. 0 (9) A3; Z=4;Dc=2. 22 g. cm-3; F(000) = 1048, μ=89. 27 cm-1 ; final R=0. 039 and Rw=0. 049for 2121 observable reflections with (I≥3. cσ(I) ). The crystal structure determinationshows that S atom coordinates to all three metal (W,Fe,Co) atoms in a μ3,-fashion,thetitle cluster core has the tetrahedral skeleton.

关键词： heterometallic cluster carbonyl sulfido tetrahedral framework

Treatment of Bell's Palsy by Acupuncture plus Microwave Therapy: A Report of 98 Cases

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Journal of Acupuncture and Tuina Science 2003年第4期1卷 49-50页

作者： QIAO Guang-wen sun Pei-hua KUAI Le Eighth Municipal People's Hospital Shanghai 200233 China Eighth Municipal People's Hospital Shanghai 200233 China

Ninety-eight patients of facial paralysis were treated by acupuncture plus microwave irradiating the postauricle area and Ashi point. After 3 courses of treatment, 71 cases were cured, 26 cases got improvement and 1 c... 详细信息

关键词： Microwaves Acupuncture Therapy Facial Paralysis

Expression of estrogen receptor （ER） -α and -βtranscripts in the neonatal and adult rat cerebral cortex, cerebellum, and olfactory bulb

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Cell Research 2001年第4期11卷 321-324页

作者： GUO XING ZHONG, JUN DA SU, QING wen sun, BING hua JIAO Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai 200433 School of Life Sciences and Medical Engineering, Tongji University, Shanghai 200092, China Shangha 1Department of Biochemistry and Molecular Biology Second Military Medical University Shanghai 200433 3Shanghai Institute of Physiology Chinese Academy of Sciences Shanghai 200031 China 1Department of Biochemistry and Molecular Biology Second Military Medical University Shanghai 200433 1Department of Biochemistry and Molecular Biology Second Military Medical University Shanghai 200433

In the present study expression of estrogen receptor subtype -α(ERα) and -β (ERβ) in the cerebral cortex, cerebellum, and olfactory bulb was investigated and compared between neonatal (1～3-days-old) and adult (250～350g) rats, using reverse transcription-polymerase chain reaction (RT- PCR). No ERα transcripts were detectable in the adult cerebellum and olfactory bulb, whereas very weak expression of ERα was present in the adult cerebral cortex. No significant difference in ERβ transcripts was detectable between the neonatal and adult rats. While transcripts for both ER subtypes were co-expressed in these brain areas of neonatal rats, although ERα expression was significantly weaker than ERβ. Even in the cerebral cortex known to contain both ER subtypes in adult rats, ERα transcripts in neonatal rats were much higher than in adult. These observations provide evidence for the existence of different expression patterns of ERcα/ERβ transcripts in these three brain areas between the neonatal and adult rats, suggesting that each ER subtype may play a distinct role in the regulation of differentiation, development, and functions of the brain by estrogen.

关键词： Cerebellum cerebral cortex estrogen receptor (ER) olfactory bulb RT-PCR.

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地方政府道德风险与农民失地问题

中国土地科学 2008年第6期22卷 70-75页

作者：孙文华南京农业大学经济与管理学院

研究目的:通过分析地方政府道德风险的成因、表现,揭示其与农民失地问题间的内在关联性。研究方法:制度分析法与因果分析法。研究结果:地方政府道德风险在经济转型过程中具有内生性,并导致农地征用过程中地方政府的强势地位引发城市规... 详细信息

研究目的:通过分析地方政府道德风险的成因、表现,揭示其与农民失地问题间的内在关联性。研究方法:制度分析法与因果分析法。研究结果:地方政府道德风险在经济转型过程中具有内生性,并导致农地征用过程中地方政府的强势地位引发城市规模急剧扩大;城市化进程中的地方政府经济利益要求引发失地农民利益被严重侵占;城市化进程中地方政府间围绕招商引资的恶性竞争直接导致失地后容易失业。研究结论:地方经济发展理念与征地制度、补偿方式等必须进行调整。

关键词：土地经济道德风险制度分析农民失地

Synthesis and Crystal Structure of a New Salen Complex

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有机化学 2003年第Z1期23卷 470-470页

作者： LI Li-Jun LI Ying sun wen-hua National Laboratory of Applied Organic Chemistry Institute of Organic Chemistry Lanzhou University Lanzhou 730000 National Laboratory of Applied Organic Chemistry Institute of Organic Chemistry Lanzhou University Lanzhou 730000 State Key Laboratory of Engineering Plastics The Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100080

　　Salen Schiff base complexes are some of the most important stereochemical models in transition metal coordina tion chemistry, with their ease of preparation and structural variation. [1] Salen complexes are extensively used as organic reaction catalysts, it was reported to be used in asymmetric cyclopropanation, epoxidation, aziridination, hydrolysis, alkylation, Diels-Alder reaction, reduction, oxidation etc. Here we report the synthesis and structure of a new salen nickel complex 4.……

关键词： asymmetric cyclopropanation synthesis and structure transition metal organic reaction nickel complex Schiff base used in

Self-assembly of Host-guest Material through Hydrogen Bonds

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有机化学 2003年第Z1期23卷 469-469页

作者： LI Li-Juna Susumu Kitagawa sun wen-hua LI Ying Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Yoshida Sakyo-ku Kyoto 606-8501 Japan National Laboratory of Applied Organic Chemistry Institute of Organic Chemistry Lanzhou University Lanzhou 730000 Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Yoshida Sakyo-ku Kyoto 606-8501 Japan State Key Laboratory of Engineering Plastics The Center for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100080 National Laboratory of Applied Organic Chemistry Institute of Organic Chemistry Lanzhou University Lanzhou 730000

　　Owing to their intriguing structures and unique properties, host-guest materials have received much attentionfrom the perspective of design and synthesis. One strategy is organic networks assembled through directional inter-molecular forces to form porous network. [1] Here we report a new organometallic framework self-assembled throughhydrogen bond and strong π-π stack by using a saloph ligand.……

关键词： design and synthesis