38365-93-4Relevant academic research and scientific papers
METHOD FOR PRODUCING CARBAMATE
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Paragraph 0049, (2018/10/16)
PROBLEM TO BE SOLVED: To provide a method for producing carbamate in which a high yield can be obtained and the amount of by-products produced can be reduced. SOLUTION: In the method, carbamate is synthesized using at least one member selected from the group consisting of amine and derivative thereof, alcohol having 3 or more carbon atoms and carbon dioxide as a raw material, cerium oxide as a catalyst, and 2-cyanopyridine as a dehydrating agent. By using an alcohol having 3 or more carbon atoms, a high yield can be obtained and the amount of by-products produced can be reduced. In addition, the pressure of carbon dioxide can be lowered and the production can be of ease. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPO&INPIT
Palladium-Catalyzed Decarboxylative Synthesis of Arylamines
Dai, Qipu,Li, Peihe,Ma, Nuannuan,Hu, Changwen
supporting information, p. 5560 - 5563 (2016/11/17)
A novel approach has been developed for the synthesis of arylamines via the palladium-catalyzed intramolecular decarboxylative coupling (IDC) of aroyloxycarbamates, obtained in situ by reacting aryl carboxylic acids with hydroxycarbamates. The reaction offers facile access to structurally diverse arylamines with the site-specific formation of the C(sp2)-N bond under mild conditions.
Copper-catalyzed carbonylation of anilines by diisopropyl azodicarboxylate for the synthesis of carbamates
Usman, Muhammad,Ren, Zhi-Hui,Wang, Yao-Yu,Guan, Zheng-Hui
, p. 107542 - 107546 (2016/11/29)
A Cu-catalyzed efficient methodology for the direct carbonylation of anilines has been developed. The N-H bond cleavage and N-C bond formation were notably achieved under solvent-free conditions and a variety of carbamates were synthesized from readily available anilines using diisopropyl azodicarboxylate (DIAD) as the carbonylating source.
Reversible double insertion of aryl isocyanates into the Ti-O bond of titanium(IV) isopropoxide
Ghosh, Rajshekhar,Nethaji, Munirathinam,Samuelson, Ashoka G.
, p. 1282 - 1293 (2007/10/03)
The insertion of phenyl isocyanate into titanium isopropoxide leads to the formation of a dimeric complex [Ti(OiPr)2(μ-O iPr){C6H5N(OiPr)CO}]2 (1) which has been structurally characterized. Reaction of titanium isopropoxide with two and more than 2 equiv. of phenyl isocyanate is complicated by competitive, reversible insertion between the titanium carbamate and titanium isopropoxide. The ligand formed by insertion of phenyl isocyanate into the titanium carbamate has been structurally characterized in its protonated form C6H5N{C(OiPr)O}C(O)N(H)C6H 5 (3aH). Insertion into the carbamate is kinetically favored whereas insertion into isopropoxide gives the thermodynamically favored product.
Reactions of Primary and Secondary Amines with Fluoronitrene Generated from Isopropyl N,N-Difluorocarbamate
Klopotek, David L.,Hobrock, Brice G.,Kovacic, Peter,Jones, Martin B.
, p. 1665 - 1667 (2007/10/02)
Isopropyl N,N-difluorocarbamate deaminates primary amines, RNH2, affording RH, N2, RNHCO2-i-C3H7, and RNH2*HF.With secondary amines, dibenzylamine gives bibenzyl, whereas pyrrolidine yields a ring-expansion product, 2,3,4,5-tetrahydropyridazine.The reactions are consistent with the generation of fluoronitrene and subsequent production of the intermediates RN=NH from RNH2 and R2N=N from R2NH.The advantages of using isopropyl N,N-difluorocarbamate as a source of fluoronitrene are discussed.
