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michael addition of Amines to Activated Alkenes Promoted by Zn/NH_4Cl System

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Chemical Research in Chinese Universities 2009年第4期25卷 461-464页

作者： KOU Jing-ping LU Yu-juan LUO Xu-yang LI Ji-zhen College of Chemistry Jilin University Changchun 130021 P. R. China College of Chemistry and Chemical Engineering Shenzhen University Shenzhen 518060 P. R. China

A Zn/NH4Cl system was exploited at room temperature to promote the michael addition reaction of various primary and secondary amines with α,β-unsaturated esters,nitriles,amides,and ketones to give the corresponding ... 详细信息

关键词： michael addition Amines Activated alkenes Zn/NH4Cl system

Cross-linked Polyamides Prepared through Direct Bulk michael addition and Polycondensation from 1,6-Hexanediamine and Methyl Acrylate

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Chinese Journal of Polymer Science 2020年第2期38卷 143-150,I0006页

作者： Sheng-Qing Yang Jin-Nan Zhao Jing-Bo Zhao Zhi-Yuan Zhang Jun-Ying Zhang Key Laboratory of Carbon Fiber and Functional Polymers(Beijing University of Chemical Technology) Ministry of Education/College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Cross-linked polyamides(c PAs)were prepared through direct bulk michael addition and subsequent *** mixed hexanediamine multi-esters(HDAMEs)were generated through the michael addition of 1,6-hexanediamine(HDA)and methyl acrylate(MA)at50℃ with different HDA/MA molar *** polycondensation of HDAMEs then proceeded at 150 or 170℃ in flasks to obtain viscous fluids,and curing was continued in tetrafluoroethylene molds to obtain c PA *** michael addition was monitored on the basis of FTIR and ESI-MS *** c PA films were characterized by DSC,TGA,dynamic mechanical analysis,and tensile *** directly prepared c PAs exhibited Tg of 1–39℃,tensile strength of up to 45 MPa,and strain at break from 18%to 40%.The c PAs with high tensile strength and good toughness were successfully synthesized through the direct bulk michael addition from HDA and MA followed with polycondensation.

关键词： michael addition Polycondensation Mechanical properties

Stereoselective michael addition and michael-aldol Tandem Reaction of Diorganyl Diselenides or Disulfides with Conju-gated Alkynones Mediated by Samarium Diiodide

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Chinese Journal of Chemistry 2004年第9期22卷 958-965页

作者：郑兴良许孝良张永敏 Department of Chemistry Zhejiang University (Campus Xixi) Hangzhou Zhejiang 310028 China Department of Chemistry and Environmental Engineering Changsha University of Science and Technology Changsha Hunan 410015 China Department of Chemistry Zhejiang University (Campus Xixi) Hangzhou Zhejiang 310028 China Department of Chemistry Zhejiang University (Campus Xixi) Hangzhou Zhejiang 310028 China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Stereoselective michael addition and michael-aldol tandem reaction of diorganyl diselenides and disulfides with conjugated alkynones mediated by samarium diiodide were studied. The reaction temperature was critical for the stereoselectivity. -Organylselenoalkenones or -organylthioalkenones and ?-organylselenoallylic alcohols or ?-organylthioallylic alcohols were prepared in good yields.

关键词： michael addition michael-aldol tandem reaction diorganyl diselenide or disulfide conjugated al-kynone samarium diiodide

Wood pulp industry by-product valorization for acrylate synthesis and bio-based polymer development via michael addition reaction

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Journal of Bioresources and Bioproducts 2023年第3期8卷 265-279页

作者： Ralfs Pomilovskis Eliza Kaulina Inese Mierina Arnis Abolins Olga Kockova Anda Fridrihsone Mikelis Kirpluks Polymer Laboratory Latvian State Institute of Wood ChemistryRiga LV-1006Latvia Institute of Technology of Organic Chemistry Faculty of Materials Science and Applied ChemistryRiga Technical UniversityRiga LV-1048Latvia Institute of Macromolecular Chemistry CAS Prague 16200Czech Republic

It is crucial to adapt the processing of forest bio-resources into biochemicals and bio-based ad-vanced materials in order to transform the current economic climate into a greener *** oil,as a by-product of the Kraft process of wood pulp manufacture,is a promising resource for the extraction of various value-added *** oil fatty acids-based multifunctional michael acceptor acrylates were *** suitability of developed acrylates for polymerization with tall oil fatty acids-based michael donor acetoacetates to form a highly cross-linked polymer ma-terial via the michael addition was *** this novel strategy,valuable chemicals and innovative polymer materials can be produced from tall oil in an entirely new way,making a significant contribution to the development of a forest-based *** different tall oil-based acrylates were successfully synthesized and *** acrylates were successfully used in the synthesis of bio-based thermoset *** polymers had a wide variety of mechanical and thermal properties(glass transition temperature from-12.1 to 29.6°C by dynamic mechanical analysis,Young’s modulus from 15 to 1760 MPa,and stress at break from 0.9 to 16.1 MPa).Gel permeation chromatography,Fourier-transform infrared(FT-IR)spectroscopy,matrix-assisted laser desorption/ionization-time of flight mass spectrometry,and nuclear magnetic resonance were used to analyse the chemical structure of synthesized *** addition,various titration methods and rheology tests were applied to characterize *** chemical composition and thermal and mechanical properties of the developed polymers were studied by using FT-IR,solid-state nuclear magnetic resonance,thermal gravimetric analy-sis,differential scanning calorimetry,dynamic mechanical analysis,and universal strength testing apparatus.

关键词： Tall oil fatty acid Fatty acids-based michael acceptor Bio-based acrylate michael addition Bio-based polymer

Aldol Condensation and michael addition of 4,4-Dimethyl- cyclohexane-l,3-dione and Aromatic Aldehydes, Unconventional Substituent Effects

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Chinese Journal of Chemistry 2011年第11期29卷 2355-2360页

作者： Kaya, Muharrem Chemistry Department Faculty of Arts and Science Dumlupmar University 43100 Kutahya Turkey

By the cyclization of 4,4-dimethylcyclohexane-1,3-dione with different aromatic aldehydes, the xanthene regio- isomers were obtained. The diversity of xanthene isomers could be determined. The electronic and steric ef... 详细信息

关键词： aldol reaction michael addition xanthene regioselectivity substituent effects X-ray diffraction

Iron catalyzed michael addition: Chloroferrate ionic liquids as efficient catalysts under microwave conditions

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Science China Chemistry 2012年第8期55卷 1614-1619页

作者： VASILOIU Maria GAERTNER Peter BICA Katharina Institute of Applied Synthetic Chemistry Vienna University of Technology Vienna A-1060 Austria

The iron containing ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate （[C4mim]C1/FeCl3; Z = 0.5） proved to be an efficient catalyst for the solvent-free metal catalyzed michael addition of β-keto esters and enones. Due to the ionic structure of the catalyst, a significant acceleration of the reaction rate was observed under microwave conditions. Furthermore, recycling of the ionic liquid catalyst could be performed after simply distilling off the products.

关键词： ionic liquids iron catalysis michael addition lewis acid microwave chemistry

[Bmim]OAc Catalyzed michael addition of Active Methylene to α,β-Unsaturated Carboxylic Esters and Nitriles

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Chemical Research in Chinese Universities 2010年第4期26卷 554-557页

作者： YANG Yu WANG Li-bing ZHANG Zhan LI Cai-meng FU Xian-lei GAO Guo-hua Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062 P R. China

michael addition of active methylene compounds to α,β-unsaturated carboxylic esters and nitriles was effectively catalyzed by a basic ionic liquid, 1-butyl-3-methylimidazolium acetate（[Bmim]OAc）. The his-addition ... 详细信息

关键词： michael addition [Bmim]OAc Bis-addition Mild reaction condition

Nitrosonium(NO^+) catalyzed michael addition of indoles to unsaturated enones

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Chinese Chemical Letters 2008年第1期19卷 55-58页

作者： Guai Li Wu Long Min Wu State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

An efficient michael addition of indoles to unsaturated enones, such as chalcones and β-nitrostyrenes, was achieved in the presence of a catalytic amount of nitrosonium tetrafluoroborate in ethyl ether. 2007 Long M... 详细信息

关键词： Indole Chalcone michael addition Nitrosonium

Flexible Self-healing Cross-linked Polyamides Synthesized Through Bulk michael addition,Polycondensation,and Diels-Alder Reaction

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Chemical Research in Chinese Universities 2022年第4期38卷 968-973页

作者： YANG Shengqing ZHAO Jinnan CHEN Shuo ZHAO Jingbo Key Laboratory of Carbon Fiber and Functional Polymers Ministry of EducationCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

Three new thermally responsive self-healing cross-linked polyamides(cPA-FU-DAs)with good tensile strength and toughness were synthesized through bulk michael addition,polycondensation,and Diels-Alder *** common stable polymers,cPA-FU-DAs can seal cracks by mere ***,the michael addition of methyl acrylate and furfurylamine was conducted,and a furfurylamine-diester(FU-DE)was ***-DE was transformed into polyamide prepolymers that contained furfuryl pendant groups(PA-FUs)through bulk polycondensation with a poly(propylene glycol)(PPG)diamine and a PPG ***-FUs were crosslinked by bismaleimide,and cPA-FU-DAs were *** michael addition was monitored by Fourier transform infrared spectroscopy and electrospray ionization mass *** reverse DA reaction of the cPA-FU-DAs was demonstrated by differential scanning calorimetry and dissolution *** thermally self-healing properties were verified by polarizing optical microscopy and tensile *** cPA-FU-DAs exhibited good mechanical properties and high self-healing *** self-healed at 130°*** tensile strength after repairing was up to 19 MPa with self-healing efficiency reaching 92%.

关键词： Self-healing Cross-linked polyamide michael addition Diels-Alder reaction Polycondensation