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Asymmetric Pinacol Coupling of Aromatic Aldehydes Catalyzed by TiCl_4(THF)_2-Zn/chiral diamines

Chinese Journal of Chemistry 2003年第10期21卷 1369-1372页

作者：李有桂蒋昌盛田青杉柯玉萍尤田耙 Department of Chemistry

Asymmetric pinacol coupling of aromatic aldehydes catalyzed by chiral diamines/low valent titanium complexes gave corresponding pinacols in good yields with high diastereoselectivity and moderate enantioselectivities.

关键词： chiral diamine pinacol,asymmetric coupling enantioselectivity

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Multiple Hydrogen Bonds Promoted ESIPT and AlE-active chiral Salic-ylaldehyde Hydrazide

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Chinese Journal of Chemistry 2018年第8期36卷 698-707页

作者： Man Wang Caiqi Cheng Jintong Song Jun Wang Xiangge Zhou Haifeng Xiang Jin Liu College of Chemistry Sichuan University Chengdu Sichuan 610041 China State Key Laboratory of Oral Diseases Department of Orthodontics West China Hospital of Stomatology Sichuan University Chendu Sichuan 610064 China Laboratory of Stem Cell Biology West China Hospital Sichuan University Chengdu Sichuan 610064 China

The simpler, the better! A series of simple and highly fluorescent salicylaldehyde hydrazide molecules （41 samples） have been designed and prepared. Even though these soft materials contain a very small π-conjugated system, they can go through multiple intramolecular and intermolecular hydrogen bonds promoted excited-state intramolecular proton-transfer （ESIPT） to display strong blue, green, yellow, and orange aggregation-induced emission （ALE） with large Stokes shifts （up to 184 nm） and high fluorescence quantum yields （φ up to 0.20）. Unusual mechanochromic fluorescence en- hancements are also found in some solid samples. Through coordination, hydrogen and halogen bonds, these flexible molecules can be used as Mg2＋（φ up to 0.46） probes, universal anion （φ up to 0.14） and unprotected amino acids （φ up to 0.16） probes, and chiral diamine （enantiomeric selectivity and φ up to 0.36 and 0.062, respectively） receptors. Combining their advantages of AlE and biocompatibility, these low cytotoxic dyes have potential application in living cell imaging. Furthermore, the effects of different functional groups on the molecule arrangement, ESIPT, AlE, probe, and chiral recognition properties are also examined, which provide a simple and bright paradigm for the design of multiple-stimuli-responsive smart materials.

关键词： promoted excited-state intramolecular proton-transfer (ESIPT) aggregation-induced emission anion hosts/probes amino acids probes chiral diamine

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Synthesis and application of chiral N,N'-dialkylated cyclohexanediamine for asymmetric hydrogenation of aryl ketones

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Chinese Chemical Letters 2011年第2期22卷 155-158页

作者： Meng Lin Ma Chuan Hong Ren Ya Jing Lv Hua Chen Xian Jun Li Department of Chemistry Xihua UniversityChengdu 610039China Key Lab of Green Chemistry and Technology Ministry of EducationThe Institute of Homogeneous Catalysis Faculty of ChemistrySichuan UniversityChengdu 610064China

chiral N,N＇-dialkylated cyclohexanediamine derived ligands have been synthesized and used in the asymmetric hydrogenation of aryl *** active alcohols with up to 90%enantiomeric excess were obtained in high yields.

关键词： chiral diamine Aryl ketone Asymmetric hydrogenation Ruthenium complex

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Using the chiral Organophosphorus Derivatizing Agents for Determination of the Enantiomeric Composition of chiral Carboxylic Acids by ^(31)PNMR Spectroscopy

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Chinese Chemical Letters 2004年第6期15卷 675-678页

作者： ChaoCHE ZhongNingZHANG GuiLanHUANG XinXingWANG ZhaoHaiQIN StateKeyLaboratoryofIntegtatedManagementofInsectsandRodents InstituteofzoologyChineseAcadamyofSciencesBeijing100080 TheSixthResearchCenter InstituteofChemicalDefeneeBeijing102205 DepartmentofAppliedChemistry ChinaAgriculturalUniversityBeijing100094

The use of chiral organophosphoras derivatizing agents prepared in situ from chiral tartrate or chiral diamine for the 31PNMR determination of the enantiomeric composition of chiral carboxylic acids is described. The ... 详细信息

关键词： chiral tartrate chiral diamine enantiomeric composition determination 31PNMR carboxylic acids.

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C1-Symmetry diamine catalyzed enantioselective Henry Reactions

C1-Symmetry diamine catalyzed enantioselective Henry Reactio...

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中国化学会第六届全国分子手性学术研讨会

作者： Yirong Zhou Dengfu Lu Yuefa Gong College of Chemistry and Chemical Engineering Huazhong University of Science and Technology

This work focused on the design and synthesis of C-symmetry diamine catalysts with strong asymmetric induction from commercially available cheap chiral starting materials such as natural amino acids and camphor via several steps of general and practical organic synthetic operations and their applications in catalytic asymmetric Henry reactions to access some useful chemical compounds ultimately.

关键词： chiral diamine Henry reaction enantioselective

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抗衡阴离子促进的手性二胺钌配合物催化亚胺的不对称氢化反应研究（英文）

抗衡阴离子促进的手性二胺钌配合物催化亚胺的不对称氢化反应研究...

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中国化学会第30届学术年会

作者： Qing-Hua Fan Institute of Chemistry Chinese Academy of Sciences

Transition metal-catalyzed asymmetric hydrogenation has been established as one of the most powerful tools for the preparation of a wide range of enantiomerically pure compounds in organic synthesis. Despite great efforts made in this field, asymmetric hydrogenation of imines, particularly N-containing heteroaromatic compounds, remains a major challenge.1 In this presentation, we will report our recent results on the asymmetric hydrogenation of the often-problematic acyclic and cyclic imines as well as some N-containing heteroarenes with chiral cationic Ru-diamine catalysts.2 It was found that the phosphine-free chiral ruthenium diamine complexes are very efficient catalysts for the asymmetric hydrogenation of a broad range of imine-type substrates. Most interestingly, the achiral counteranions are critically important for the high enantioselectivity and diastereoselectivity. The related catalytic mechanism will also be discussed in this presentation.

关键词： asymmetric hydrogenation chiral diamine imines heteroarenes ruthenium

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