- Interaction of biotin with Mg-O bonds: Bifunctional binding and recognition of biotin and related ligands by the Mg(15-crown-5)2+ unit
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The interaction between biotin and the macrocyclic magnesium complex Mg(15-crown-5)(Otf)2 (15-crown-5 is 1,4,7,10,13-pentaoxacyclopentadecane, Otf- is trifluoromethanesulfonate anion) in solution was studied as a model for metal-biot
- Sanchez, Elizabeth R.,Gessel, Mary C.,Groy, Thomas L.,Caudle, M. Tyler
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Read Online
- 1-ACRYLOYLIMIDAZOLIDINE-2-ONE COMPOUND
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To provide a compound that is expected to be applied to cell culture materials, temperature-responsive polymer materials and the like.SOLUTION: The present invention relates to a 1-acryloylimidazolidine-2-one compound represented by formula (1) (where R1a is a hydrogen atom, a C1 to 4 alkyl group, a benzyl group or an oxyalkyl group represented by formula (2). R2a is a hydrogen atom or a C1 to 4 alkyl group. R3a is a hydrogen atom or a methyl group).SELECTED DRAWING: None
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Paragraph 0062-0064
(2021/03/03)
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- SBA-15 Supported Dendritic ILs as a Green Catalysts for Synthesis of 2-Imidazolidinone from Ethylenediamine and Carbon Dioxide
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In this work, a simple and facile approach is conducted for preparing many new SBA-15 supported dendritic imidazolium ILs heterogeneous catalysts SBA-15/IL(1–3) having high ionic density from SBA-15. SBA-15/IL(3) as a green heterogeneous catalyst can be used for synthesis of 2-imidazolidinone from ethylenediamine and carbon dioxide and considering solvent-free condition. SBA-15/IL(3) showed to have the highest catalytic activity besides a positive dendritic influence on the yields of the synthesis of 2-imidazolidinone in the presence of CO2 is seen because of existing the high-density peripheral zwitterionic ionic liquid functional groups on the biobased SBA-15/IL(3) catalyst surfaces. Graphical Abstract: [Figure not available: see fulltext.]
- Liu, Jinghan,Ma, Jianjun,Miao, Penghua,Min, Qingwang,Qi, Meijuan,Shamsa, Farzaneh
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- Photocatalytic Intramolecular C-H Amination Using N-Oxyureas as Nitrene Precursors
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Nitrenes are remarkable high-energy chemical species that enable direct C-N bond formation, typically via controlled reactions of metal-stabilized nitrenes. Here, in contrast, the combined use of photocatalysis with careful engineering of the precursor enabled C-H amination forming imidazolidinones and related nitrogen heterocycles from readily accessible hydroxylamine precursors. Preliminary mechanistic results are consistent with the formation of free carbamoyl triplet nitrenes as reactive intermediates.
- Ivanovich, Ryan A.,Polat, Dilan E.,Beauchemin, André M.
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supporting information
p. 6360 - 6364
(2020/09/02)
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- N-VINYLIMIDAZOLIDONE COMPOUND, AND POLYMER THEREOF
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PROBLEM TO BE SOLVED: To provide an N-vinylimidazolidone compound polymer that is expected to be applied for a cell culture material, a temperature-responsive material and others. SOLUTION: The present invention provides a polymer polymerized with an N-vinylimidazolidone compound (1) as a monomer, or a copolymer comprising the monomer and a monomer of a different structure (R1 is H, C1-12 alkyl or acyl; R2 and R3 is H or methyl). SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
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Paragraph 0073; 0074
(2017/01/02)
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- Highly efficient synthesis of cyclic ureas from CO2 and diamines by a pure CeO2 catalyst using a 2-propanol solvent
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Pure cerium oxide (CeO2) acts as an effective and reusable heterogeneous catalyst for direct synthesis of cyclic ureas from CO2 and diamines even at a low CO2 pressure of 0.3 MPa. 2-Propanol is the most preferable solvent to provide good selectivity. The system composed of a CeO2 catalyst and a 2-propanol solvent is applied to various diamines to provide the corresponding cyclic ureas in high yields (78-98%), including six-membered-ring ureas that are difficult to be synthesized from CO 2. Based on the kinetic studies on the effect of CO2 pressure and amine concentration and FTIR studies on adsorption of ethylenediamine and CO2 onto CeO2, the following mechanism for the synthesis of cyclic urea is proposed: (1) formation of carbamic acid and carbamate species on CeO2, (2) decomposition of carbamic acid to a free amino group and CO2, (3) nucleophilic attack of the amino group on the carbamate on CeO2 to produce the cyclic urea and (4) desorption of the product and regeneration of CeO2.
- Tamura, Masazumi,Noro, Kensuke,Honda, Masayoshi,Nakagawa, Yoshinao,Tomishige, Keiichi
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supporting information
p. 1567 - 1577
(2013/09/24)
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- QUINOLINE AND QUINAZOLINE DERIVATIVES HAVING AFFINITY FOR 5HT1-TYPE RECEPTORS
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Compounds of formula (I) and pharmaceutically acceptable salts thereof are provided: wherein R1, m, X, R2, n, W, p, Y, Z, R3, R4, R5 and q have the meanings as defined in the description. Methods of preparation and uses thereof in therapy, particularly for CNS disorders such as depression or anxiety, are also disclosed.
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Page/Page column 105
(2008/06/13)
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- Catalytic oxidative carbonylation of primary and secondary diamines to cyclic ureas. Optimization and substituent studies
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W(CO)6-catalyzed oxidative carbonylation of 1,3-propanediamine to the corresponding urea has been examined under a variety of conditions. Following optimization, the Thorpe-Ingold effect on ring closure was studied using 2,2-dialkyl-1,3-propanediamines. For the 2,2-dimethyl- and 2,2-dibutyl-1,3-propanediamines, the yields were increased significantly as compared to that of the unsubstituted case. The eight-membered cyclic urea 5-butyl-5-ethyl-1,3-diazepan-2-one (5f) was formed in 38% yield, while only trace amounts of the cyclic urea were produced from the parent 1,5-pentanediamine. In a study of secondary diamines, yields from the carbonylation of N,N′-dialkyl-2,2-dimethyl-1,3-propanediamines were lower than those obtained from the primary diamines. The main byproducts from secondary diamines were tetrahydropyrimidine derivatives formed from a competitive reaction of the substrate with the oxidant and base.
- Qian, Fang,McCusker, Jennifer E.,Zhang, Yue,Main, A. Denise,Chlebowski, Mary,Kokka, Michiyo,McElwee-White, Lisa
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p. 4086 - 4092
(2007/10/03)
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