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Enantioselective and a-Regioselective Allylic Amination of Morita-Baylis-Hillman Acetates with Simple aromatic amines Catalyzed by Planarly Chiral Ligand/Palladium Catalyst

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Chinese Journal of Chemistry 2012年第11期30卷 2641-2646页

作者：王炎张涛刘利王东陈拥军 Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Key Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Graduate School of Chinese Academy of Sciences Beijing 100049China

An asymmetric allylic amination of Morita-Baylis-Hillman acetates with simple aromatic amines catalyzed by planarly chiral ligand/palladium-catalyst was developed in good yield with excellent a-regioselectivity （a/γ... 详细信息

关键词： asymmetric allylic amination Morita-Baylis-Hillman adducts aromatic amines palladium catalysis,diphosphine ligands

Ionic liquid based dispersive liquid-liquid microextraction of aromatic amines in water samples

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Chinese Chemical Letters 2008年第8期19卷 985-987页

作者： Yun Chang Fan Zheng Liang Hu Mei Lan Chen Chao Shen Tu Yan Zhu Department of Chemistry Xixi Campus Zhejiang University Hangzhou 310028 China The Zhejiang University National Science Park Hangzhou 310013 China Biology and Environment Engineering College of Zhejiang Shuren University Hangzhou 310015 China

In this work, a new microextraction method termed ionic liquid based dispersive liquid-liquid microextraction （IL-DLLME） was demonstrated for the extraction of 2-methylaniline, 4-chloroaniline, 1-naphthylamine and 4-aminobiphenyl in aqueous matrices. After extraction the ionic liquid （IL） phase was injected directly into the high performance liquid chromatography （HPLC） system for determination. Some parameters that might affect the extraction efficiency were optimized. Under the optimum conditions, good linear relationship, sensitivity and reproducibility were obtained. The limits of detection （LOD, S/N = 3） for the four analytes were in the range of 0.45-2.6 μg L^-1. The relative standard deviations （R.S.D., n = 6） were in the range of 6.2-9.8%. This method was applied for the analysis of the real water samples. The recoveries ranged from 93.4 to 106.4%. The main advantages of the method are high speed, high recovery, good repeatability and volatile organic solvent-free.

关键词： Ionic liquid (IL) Dispersive liquid-liquid microextraction (DLLME) High performance liquid chromatography (HPLC) aromatic amines

Catalytic Thiourea Promoted Electrophilic Thiocyanation of Indoles and aromatic amines with NCS/NH4SCN

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Chinese Journal of Chemistry 2016年第11期34卷 1081-1085页

作者： Cancan Wang Zhonghao Wang Liang Wang Qun Chen Mingyang He School of Petrochemical Engineering Changzhou University Changzhou Jiangsu 213164 China

A simple and efficient protocol for the electrophilic thiocyanation of indoles and aromatic amines with thiourea/NCS/NH4SCN system has been developed. The major features of the present procedure are the mild conditions, good yields, short reaction times, and the use of inexpensive and readily available organocatalyst. Moreover, N-chlorosueeinimide （NCS） was found to be indispensable, and thiourea could greatly promote the reaction.

关键词： thiocyanation indoles aromatic amines catalytic thiourea N-chlorosuccinimide

A Novel Synthesis of N-Methyl-N-aryl Carbamates from aromatic amines and Dimethyl Carbonate Catalyzed by K_2CO_3/Bu_4NBr

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Chinese Chemical Letters 2004年第8期15卷 889-891页

作者： ZhenLuSHEN XuanZhenJIANG DepartmentofChemistry ZhejiangUniversityHangzhou310027

A facile synthesis of N-methyl-N-aryl carbamates from aromatic amines and dimethyl carbonate (DMC) has been achieved with high yields in the presence of potassium carbonate (K2CO3)and tetrabutylammonium bromide (Bu4NB... 详细信息

关键词： Carbamate aromatic amines dimethyl carbonate tetrabutylammonium bromide.

Construction of isolated Ni sites on nitrogen-doped hollow carbon spheres with Ni-N_(3) configuration for enhanced reduction of nitroarenes

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Nano Research 2022年第7期15卷 6001-6009页

作者： Binbin Feng Rou Guo Qiulan Cai Yaping Song Nan Li Yanghe Fu De-Li Chen Jiangwei Zhang Weidong Zhu Fumin Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China Dalian National Laboratory for Clean Energy&State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Designing and synthesizing high-efficiency non-precious metal-based catalysts having uniform active sites increases the reactivity and selectivity of materials and provides a platform for an in-depth understanding of their catalytic reaction *** this study,we provided an approach for fabricating isolated nickel single-atom sites(Ni SAs)with high loading(4.9 wt.%)stabilized on nitrogen-doped hollow carbon spheres(NHCS)using a core–shell structured Zn/Ni bimetallic zeolitic imidazolate framework(ZIF)composite as the sacrificial *** as-fabricated Ni SAs/NHCS catalyst shows superior activity,selectivity,and recycling durability for the catalytic transfer hydrogenation of nitrobenzene to aniline,thus achieving 100%yield of aniline with a turn-over frequency(TOF)value as high as 29.9 h^(−1) under mild *** TOF value is considerably superior to the supported Ni nanoparticle *** experiments designed show that the hollow structure feature of NHCS facilitates accessible active sites and mass transfer,which thus contributes to the enhancement of the catalytic performance of Ni SAs/*** functional theory calculations show the high chemo-selectivity and activity of the Ni SAs catalyst,arising from the unique role of the single Ni-N3 site on simultaneously activating the H donor(N_(2)H_(4))and substrate,as well as the hydrogenation of the–NOH group as the rate-determining step.

关键词： single-atom catalyst chemo-selective reduction nitro compounds aromatic amines

Crystallization-induced phosphorescence, remarkable mechanochromism, and grinding enhanced emission of benzophenone-aromatic amine conjugates

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Chinese Chemical Letters 2018年第10期29卷 1533-1536页

作者： Weijian Luo Yiren Zhang Yongyang Gong Qing Zhou Yongming Zhang Wangzhang Yuan Shanghai Key Lab of Electrical Insulation and Thermal Aging Shanghai Electrochemical Energy Devices Research CenterSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University

Pure organic luminogens with efficient room temperature phosphorescence（RTP） and remarkable mechanochromism are highly desired in view of their fundamental significance and technical applications. Herein, four twisted pure organic luminogens based on benzophenone and aromatic amines were synthesized and their photophysical properties were thoroughly investigated. They exhibit crystallization-induced phosphorescence（CIP）, giving bright fluorescence and phosphorescence dual emission in crystals. Upon grinding, they become amorphous and emit predominantly red-shifted fluorescence, demonstrating remarkable mechanochromism. Furthermore, three of them even demonstrate greatly enhanced emission upon grinding, which is rarely observed in twisted D-A structured luminogens.

关键词： Crystallization-induced phosphorescence Room temperature phosphorescence Mechanochromism Benzophenone aromatic amines

Samarium-promoted Chemoselective Reduction of aromatic Nitro Compounds in Ionic Liquid

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Chinese Journal of Chemistry 2002年第9期20卷 925-928页

作者：郑兴良张永敏等 DepartmentofChemistry ZhejiangUniversity（CampusXixi）HangzhouZhejiang310028China StateKeyLaboratoryofOrganometallicChemistry ShanghaiInstituteofOrganicChemistryChinsesAcademyofSc

bState Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China The differently substituted aromatic nitro compounds were chemoselectively reduced by Sm/HOAc system in an ionic liquid medium to afford aromatic amines. Under these conditions the other substituents, such as -X, -CHO, -COOH, -CN, -NHTos and -alkyl, remained intact. The notable advantages of this reaction are its mild conditions, simple operation, short reaction time, high yields and easy recycling of ionic liquid.

关键词： ionic liquid samarium/HOAc system chemoselective reduction aromatic nitro compounds aromatic amines

Copper-Catalyzed Enantioconvergent Radical C(sp^(3))−N Cross- Coupling to Access Chiral α-Amino-β-lactams

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Precision Chemistry 2023年第10期1卷 576-582页

作者： Jing-Jing Zheng Wei-Long Liu Qiang-Shuai Gu Zhong-Liang Li Ji-Jun Chen Xin-Yuan Liu Shenzhen Key Laboratory of Cross-Coupling Reactions Southern University of Science and TechnologyShenzhen 518055China Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Academy for Advanced Interdisciplinary Studies and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

A copper-catalyzed enantioconvergent radical C-(sp^(3))-N cross-coupling of racemic tertiaryα-bromo-β-lactams with aromatic amines is developed under mild thermal reaction *** use of a sterically demanded oxazoline-derived sulfonamide N,N,N-ligand is crucial for the reaction initiation and effective enantio-discrimination of the azetidinone-derived cyclic alkyl *** strategy provides an attractive approach to access chiralα-amino-β-lactams,an important structural motif in many biologically active *** mechanistic studies support the formation of azetidinone-derived alkyl radicals from the L*Cu(I)-amido complex andα-bromo-β-lactams.

关键词： copper asymmetric radical reactions cross-coupling aromatic amines chiralα-amino-β-lactams

PHOTOCHROMISM AND LUMINESCENCE OF DOPANT CHROMOPHORES THROUGH TWO-PHOTON IONIZATION IN POLYMER FILMS

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Chinese Journal of Polymer Science 2001年第2期19卷 129-134页

作者： Masahide Yamamoto Hideo Ohkita Shinzaburo Ito Faculty of Science and Engineering Ritsumeikan University Kusatsu Shiga 525-8577 JapanDepartment of Polymer Chemistry Graduate School of Engineering Kyoto University Sakyo Kyoto 606-8501 JapanDepartment of Polymer Chemistry Graduate School of Engineering Kyoto University Sakyo Kyoto 606-8501 Japan

Two-photon ionization and recombination processes of an aromatic chromophore doped in polymer films werestudied and the features of these processes were discussed in relation to photofunctional polymers, An aromatic moleculehaving low ionization potential, e.g., N,N,N',N'-tetramethyl-p-phenylene diamine doped in poly(methyl methacrylate)(PMMA) film was easily photoionized by intense laser ligh excitation, giving a colored radical cation (photochromism) anda trapped electron in PMMA matrix. As a reversed process, the radical cation recombined with the trapped electron, showingdiscoloration and emitting luminescence, either isothermal luminescence (ITL), or thermoluminescence (TL). In this report,ITL and TL through the charge recombination process were studied and the luminescence was suggested as a mean of the read-out of photorecording.

关键词： Two-photon ionization Photochromism Charge recombination Trapped electron Isothermal luminescence Thermoluminescence aromatic amines Poly(methyl methacrylate)