- Synthetic method N - cyanoethyl imidazole compound
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The N - cyanoethyl imidazole compound is prepared from imidazoles and derivatives thereof as raw materials and acrylonitrile as Michael addition acceptors, and is free of catalysts. The N - cyanoethyl imidazole compound is synthesized in a solvent-free and air atmosphere at a high yield in a one-step method. The method is simple to operate, environmentally friendly, economical and practical, stable in performance and wide in product market. The reaction does not need special post-treatment, no by-product is generated, and the method is suitable for industrial production.
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Paragraph 0033-0036
(2021/10/16)
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- Solvent- and Catalyst-Free Aza-Michael Addition of Imidazoles and Related Heterocycles
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This work demonstrates the scope and limitations of the aza-Michael addition of imidazoles and related heterocycles with electron deficient olefins under solvent- and catalyst-free conditions. The reaction proceeds at 80 °C within hours towards completion as long as the azole derivative is sufficiently soluble in the Michael acceptor, which has been used in small excess. Workup only comprises evaporation of surplus Michael-acceptor, and no additional solvents are necessary for purifying the products.
- Gobec, Florian,Kodolitsch, Katharina,Slugovc, Christian
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- Efficient protocol for Aza-Michael addition of N-heterocycles to α,β-unsaturated compound using [Ch]OH and [n-butyl urotropinium]OH as basic ionic liquids in aqueous/solvent free conditions
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The present work emphasizes on a green methodology using designed and synthesized basic ionic liquid, [n-butyl Urotropinium]OH, and commercially available aqueous solution of choline hydroxide [Ch]OH as catalysts for executing Aza-Michael addition of N-heterocycles to α,β-unsaturated compounds at room temperature. The highlighting features of these catalysts include using low concentration of both catalysts along with [Ch]OH being low cost and biodegradable, [n-butyl Urotropinium]OH significantly enhancing the high substrate/catalyst ratio to obtain the desired products in high yield and purity in most cases. Further, both catalysts were recyclable and recoverable up to five cycles.
- Kumar, Sitanshu,Kaur, Amanpreet,Singh, Vasundhara
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p. 193 - 201
(2019/01/24)
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- Imidazolium-based ionic liquid and preparation method and application thereof
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The invention relates to an imidazolium-based ionic liquid and a preparation method and application thereof. The ionic liquid has a structural formula shown in the description, wherein n1 is 2 or 3 or4, n2 is 0 or 1, and Y- is BF4- or PF6- or TFSI- or N(CN)2- or (FSO2)2N-. By adopting triple substitution and introducing electron donating groups and electron withdrawing groups, the imidazolium-based ionic liquid has two different types of unsaturated bond structures of nitrile groups and alkenyl groups; in the preparation process, suitable parameters are selected to introduce nitrile groups. When serving as a lithium ion battery electrolyte, the imidazolium-based ionic liquid can improve the electrochemical window of the electrolyte; by applying the imidazolium-based ionic liquid to high-voltage lithium ion batteries with LiNi0.5Mn1.5O4 as the positive electrode material, the safety and electrochemical properties of the lithium ion batteries can be improved.
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Paragraph 0082; 0083; 0089; 0090
(2018/10/11)
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- GAS TREATING SOLUTIONS CONTAINING IMIDAZOLE-AMINE COMPOUNDS
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Systems comprising a composition where an imidazole is tethered to an amine and a solvent are described herein. Methods of their preparation and use are also described herein. The methods of using the systems include the reduction of volatile compounds from gas streams and liquid stream.
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Paragraph 0103
(2018/04/02)
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- Imidazole ionic liquid and preparation method and application thereof
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The invention relates to imidazole ionic liquid and a preparation method and application thereof. A structural formula of the ionic liquid is as follows, wherein m is 1, 2, 3 or 4; n is 2 or 3. The application of the imidazole-based ionic liquid is use in an anion exchange membrane of a synthetic battery. The anion exchange membrane comprises: a polymer matrix, inorganic particles and ionic liquid; wherein amass ratio of the inorganic particles to the polymer matrix is (0.01 to 0.1):1, and the mass percentage of the inorganic particles to the ionic liquid is 1:(2 to 4). The imidazole type ionic liquid is low-cost, has ideal alkali stability, and can be used as an ideal material for preparing the anion exchange membrane. (The structural formula is shown in the description).
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Paragraph 0046-0047; 0061-0062
(2019/01/08)
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- Method for preparing 2, 4-diamido-6-[2-(2-methyl-1-imidazole)ethyl]-1, 3, 5-triazine
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The invention discloses a method for preparing 2, 4-diamido-6-[2-(2-methyl-1-imidazole)ethyl]-1, 3, 5-triazine. The method comprises: 2-methylimidazole as a raw material is subject to addition reaction with acrylonitrile so as to obtain 1-cyanoethyl-2-methylimidazole, and the 1-cyanoethyl-2-methylimidazole is cyclized with dicyandiamide so as to undergo two-step reactions to synthesize a target product. Compared with the prior art, the method provided by the invention has the advantages: the 2-methylimidazole as the raw material is subject to the addition reaction and the cyclization reaction so as to synthesize the target product, so that the process has the advantages of high yield, simple and convenient operations and the like, and industrial mass production is facilitated.
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Paragraph 0020; 0021
(2017/04/29)
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- CARBON MATERIAL, FUEL CELL, AND METHOD FOR PRODUCING CARBON MATERIAL
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A carbon material according to an embodiment contains: 2% by mass or more and 15% by mass or less of nitrogen and 0.3% by mass or more and 2.5% by mass or less of sulfur, and 40% by mass or more of the nitrogen is a graphitic nitrogen.
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- Polystyrene-supported CuI-imidazole complex catalyst for aza-Michael reaction of imidazoles with α,β-unsaturated compounds
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The polystyrene-supported CuI-imidazole complex catalyst was prepared and characterized by IR spectroscopy, elemental analysis, SEM/TEM and TG/DSC. The complex catalyst was globular with the size of 400-500 nm and showed a good thermal stability at high temperature. The immobilized Cu metal in the complex catalyst was about 0.85 mmol/g. By using the catalyst, aza-Michael reaction of imidazoles to α,β-unsaturated compounds was performed with good yields in 4-8 h. The catalyst showed an excellent recycling efficiency over five cycles without distinct leaching of metal from the polymer support.
- Li, Lixia,Liu, Zuliang,Ling, Qilong,Xing, Xiaodong
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experimental part
p. 178 - 184
(2012/03/09)
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