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Continuous microflow visible-light photocatalytic N-formylation of piperidine and its kinetic study

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Chinese Chemical Letters 2024年第1期35卷 285-289页

作者： Yangyang Xu Fang Zhao Xuhong Guo State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China International Joint Research Center of Green Energy Chemical Engineering Shanghai 200237China

N-formylation of amines,a class of synthetically important reactions,is typically conducted using metal catalysts that are relatively expensive or not readily available and usually needs harsh conditions to increase the reaction ***,an efficient continuous microflow strategy was developed for the gas-liquid visible-light photocatalytic N-formylation of piperidine,which achieved a reaction yield of 82.97%and a selectivity of>99%at 12 min using cheap organic dye photocatalyst under mild reaction *** influence of essential parameters,including light intensity,temperature and equivalents of the gas,additive and photocatalyst,on the reaction yield was systematically ***,kinetic investigations were conducted,exhibiting the dependence of reaction rate and equilibrium yield of N-formylpiperidine on light intensity,temperature and photocatalyst *** microflow photocatalytic approach established in this work,which realized a markedly higher space-time yield than the conventional batch method(37.9 vs.0.212 mmol h-1 L-1),paves the way for the continuous,green and efficient synthesis of N-formamides.

关键词： Microflow Visible-light photocatalysis N-Formylation piperidine Kinetics

Diastereoselective Synthesis of Chiral Pyrrolidine and piperidine Ring Systems

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Chinese Journal of Chemistry 2004年第7期22卷 727-731页

作者：邵志会彭芳芝朱保昆涂永强张洪彬 State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou Gansu 730000 China School of Pharmacy Yunnan University Kunming Yunnan 650091 China School of Pharmacy Yunnan University Kunming Yunnan 650091 China State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou Gansu 730000 China

A diastereoselective method for the synthesis of chiral pyrrolidine and piperidine ring containing compounds was described. The protocol of bromination followed by aminocyclization furnishes an easily handled while highly efficient procedure for the intramolecular amidation of an isolated double bond. High diastereomeric excess was observed in this synthetic procedure.

关键词： diastereoselective pyrrolidine piperidine aminocyclization

SYNTHESIS AND LIGHTFASTNESS PROPERTIES OF DYES CONTAINING HINDERED piperidine RESIDUES AS INTERNAL STABILIZING GROUPS

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Journal of China Textile University(English Edition) 1991年第4期9卷 24-33页

作者：戴瑾瑾 John Griffiths Department of Textile Chemical Engineering CTU Department of Colour Chemistry Univ.of LeedsU.K.

The representative azo and anthraquinone dyes containing an insulated hindered piperidinegroup were *** effect of these pendent groups on lightfastness properties of the dyeswas studied,both in ethyl acetate solution and on cellulose acetate and polyester *** differ-ent trend of fading rates of azo dyes and anthraquinone dyes in solution and on substrates suggestsdifferent fading mechanisms operating in each case.

关键词： lightfastness synthesis dyes hindered piperidine group intra-molecular stabilized dye

Design,synthesis and biological estimation of 1-(benzoxazole-2-yl)piperazine and 4-(benzoxazole-2-yl)piperidine derivatives as potentialα_1-AR antagonists

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Chinese Chemical Letters 2008年第10期19卷 1193-1195页

作者： Jia Bin Li Lin Xia Bin Wu Tao Wang Zhen Zhou Jiang Department of Inorganic Chemistry China Pharmaceutical University Nanjing 210009 China Department of Medicinal Chemistry China Pharmaceutical University Nanjing 210009 China National Drug Screening Center China Pharmaceutical University Nanjing 210009 China School of Pharmacy Nanjing Medical University Nanjing 210029 China

Two series of 1-（benzoxazole-2-yl）piperazine （Sa-i） and 4-（benzoxazole-2-yl）piperidine compounds （10a-i） were designed, synthesized and evaluated for their α1-AR antagonistic activities. Biological assay in v... 详细信息

关键词： BPH α1-AR antagonists Benzoxazole piperidine Piperazine

NMR and FT-IR Analysis of New Molecular Complex 1-piperidine-carboxylate-Piperidinium-H_2O

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Wuhan University Journal of Natural Sciences 2008年第1期13卷 93-97页

作者： JIANG Huiming ZHANG Shubiao JIN Rongchao College of Life Science Dalian Nationalities University Dalian 116600 Liaoning China Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA

piperidine absorbs CO2 and H2O contents in air to form a molecular complex： piperidium-1-piperidinecarboxylate-H2O. The structure of the complex was characterized by FT-IR and NMR. The complex is stabilized via five hydrogen bonds between the three components, N…O electrostatic interaction and O…O interaction （electron transfer） betweenl-piperidinecarboxylate and H2O. Through electron transfer from the carbamate ion, the oxygen atom in water molecule is strongly negatively charged and the O-H bond is considerably shorter than that of free water molecule. The formation of the molecular complex is a reversible process and will decompose upon heating. The mechanism of formation and stabilization is further investigated herein.

关键词： piperidine molecular complex NMR FT-IR hydrogen bond electron transfer

New Crystal Structure of Molecular Complex 1-piperidine Carboxylate-Piperidinium-H_2O Studied by X-Ray Single Crystal Diffraction

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Wuhan University Journal of Natural Sciences 2007年第6期12卷 1099-1104页

作者： JIANG Huiming ZHANG Shubiao JIN Rongchao MA Yunhua College of Life Science Dalian Nationalities University Dalian 116600 Liaoning China Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA

piperidine absorbs CO2 and H2O in air to form a molecular complex： piperidium-l-piperidinecarboxylate-H2O. The structure of the complex was characterized by X-ray single crystal diffraction. The crystal structure was determined to be triclinic, space group P1^-with a=0.648 6（8） nm, b=0.809 200） nm, c= 1.357 1（16） nm, a=96.96706）°, β =102.506（15）°,γ=104.202 05）°, Z=2. The complex is stabilized via five hydrogen bonds between the three components, N-O electrostatic interaction and O-O interaction （electron transfer） betweenl-piperidinecarboxylate and H2O. Due to electron transference of carbamate ion, the oxygen atom in water molecule is strongly negatively charged and the O-H bond is considerably shorter than that of the free molecule of water. The formation of the molecular complex is a reversible process and will decompose upon heating. The mechanism of formation and stabilization is further investigated herein.

关键词： piperidine molecular complex hydrogen bond electron transfer single crystal

Synthesis of FER zeolite with piperidine as structure-directing agent and its catalytic application

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Chinese Journal of Catalysis 2017年第11期38卷 1880-1887页

作者： Weifeng Chu Fucun Chen Ce Guo Xiujie Li Xiangxue Zhu Yang Gao Sujuan Xie Shenglin Liu Nan Jiang Longya Xu Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China Nanjing Rongxin Chemical Co. Ltd. Nanjing 210047 Jiangsu China

The synthesis of ferrierite(FER)zeolite using piperidine as an organic structure‐directing agent was investigated.X‐ray diffraction,X‐ray fluorescence,N2‐adsorption,and scanning electron microscopy were used to characterize the crystal phases,textural properties,and particle morphologies of the zeolite *** crystallization behavior of the FER zeolite was found to be directly related to crystallization ***150?C,pure FER phase was observed throughout ***160–170?C,MWW phase appeared first and gradually transformed into FER phase over time,indicating that the FER phase was thermodynamically *** the piperidine‐Na2O‐H2O synthetic system,alkalinity proved to be the crucial factor determining the size and textural properties of FER ***,the obtained FER samples exhibited good catalytic performance in the skeletal isomerization of1‐butene.

关键词： FER zeolite piperidine Crystallization process MWW zeolite Skeletal isomerization

Design,Synthesis and Biological Evaluation of piperidine Substituted DAPY DV-1 NNRTIs

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Design,Synthesis and Biological Evaluation of Piperidine Sub...

Amination reaction of 4-chloroacetophenone and piperidine promoted by magnesium salts

2011年全国药物化学学术会议——药物的源头创新

作者： Christophe Pannecouque Erik De Clercq Rega Institute for Medical Research K.U.LeuvenMinderbroedersstraat 10B-3000 LeuvenBelgium

＜正＞Diarylpyrimidine（DAPY） derivatives,one family of HIV-1 non-nucleoside reverse transcriptase inhibitors（NNRTIs） with excellent potency against wild-type and mutant strains of HIV-1,have attracted considerable attention over the past few ***,a series of piperidine linked aminopyrimidine derivatives was reported with good potency in both enzyme and antiviral assays,

关键词： HIV-1 NNRTIs DAPY piperidine Antiviral activity

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Amination reaction of 4-chloroacetophenone and piperidine pr...