3848-45-1Relevant articles and documents
N -Arylation of (hetero)arylamines using aryl sulfamates and carbamates via C-O bond activation enabled by a reusable and durable nickel(0) catalyst
Dindarloo Inaloo, Iman,Majnooni, Sahar,Eslahi, Hassan,Esmaeilpour, Mohsen
, p. 13266 - 13278 (2020/10/07)
An effective and general aryl amination protocol has been developed using a magnetically recoverable Ni(0) based nanocatalyst. This new stable catalyst was prepared on Fe3O4@SiO2 modified by EDTA and investigated by FT-IR, EDX, TEM, XRD, DLS, FE-SEM, XPS, NMR, TGA, VSM, ICP and elemental analysis techniques. The reaction proceeded via carbon-oxygen bond cleavage of (hetero)aryl carbamates and sulfamates under simple and mild conditions without the use of any external ligands. This method demonstrated functional group tolerance in the N-arylation of various nitrogen-containing compounds as well as aliphatic amines, anilines, pyrroles, pyrazoles, imidazoles, indoles, and indazoles with good to excellent yields. Furthermore, the catalyst could be easily recovered by using an external magnetic field and directly reused at least six times without notable reduction in its activity. This journal is
One-Pot Synthesis of O -Aryl Carbamates
Varjosaari, Sami E.,Suating, Paolo,Adler, Marc J.
, p. 43 - 47 (2015/12/26)
A simple, versatile, one-pot procedure for the synthesis of substituted O-aryl carbamates has been developed, and a protocol is henceforth described. N-Substituted carbamoyl chloride is formed in situ and subsequently reacted with a substituted phenol, avoiding the direct manipulation of sensitive reactants. This procedure offers an economical and efficient route to many compounds of interest.
A method of synthesizing aromatic carbamate
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Paragraph 0126-0127, (2018/02/04)
The invention relates to a synthetic method for romatic carbamic acid ester. The method comprises the following steps: adding diaryliodonium salt, amine, alkali and an organic solvent into a high-pressure reaction kettle, wherein diaryliodonium salt and a
Base-Promoted Coupling of Carbon Dioxide, Amines, and Diaryliodonium Salts: A Phosgene- and Metal-Free Route to O-Aryl Carbamates
Xiong, Wenfang,Qi, Chaorong,Peng, Youbin,Guo, Tianzuo,Zhang, Min,Jiang, Huanfeng
supporting information, p. 14314 - 14318 (2015/10/05)
A phosgene- and metal-free synthesis of O-aryl carbamates is realized through a three-component coupling of carbon dioxide, amines and diaryliodonium salts. The reaction only requires a base as the promoter, providing access to a diverse array of O-aryl c
Study of the kulinkovich synthesis of 1-methylcyclopropanol and its conversion into 1-methylcyclopropyl 4-nitrophenyl carbonate
Wright, Stephen W.,Darout, Etzer,Stevens, Benjamin D.
, p. 2481 - 2484 (2013/09/23)
A detailed investigation of the preparation of 1-methylcyclopropanol via the Kulinkovich reaction is presented. Reaction and workup parameters were optimized to provide a reproducible procedure for the synthesis of multigram quantities of 1-methylcyclopropanol. Key improvements were the use of titanium tetra(2-ethyl)hexyloxide as catalyst, reduction in the volume of reaction solvent, addition of the methyl acetate starting material in portions, and azeotropic distillation to remove by-products. The preparation of the 4-nitrophenyl carbonate ester was likewise studied and optimized. Georg Thieme Verlag Stuttgart New York.
