Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/Schiff base/Pd complex as an efficient heterogeneous and recyclable nanocatalyst for chemoselective N-arylation of O-alkyl primary carbamates
作者:A. R. Sardarian、M. Zangiabadi、I. Dindarloo Inaloo
DOI:10.1039/c6ra17268g
日期:——
An Fe3O4@SiO2/Schiff base/Pd complex as an efficient, heterogeneous magnetically recoverable and reusable catalyst for the N-arylation of O-alkyl primary carbamates.
one‐pot synthesis of N‐(hetero)aryl carbamates through the reaction between alcohols and in‐situ produced (hetero)aryl isocyanates in the presence of a nickel catalyst. The phenolic C−O bond was activated via the reaction of phenol with cyanuric chloride (2,4,6‐trichloro‐1,3,5‐triazine (TCT)) as an inexpensive and readily available reagent. This strategy provides practical access to N‐(hetero)aryl carbamates
Interaction between trialkyltin alkoxide and phenyl isocyanate in the formation of tin carbamate: A computational and experimental study
作者:Ransi Devendra、Neil R. Edmonds、Tilo Söhnel
DOI:10.1016/j.molcata.2014.08.003
日期:2014.12
trialkyltin alkoxide and phenylisocyanate. In the present work computational and experimental methods were used to investigate the interaction between trialkyltin alkoxide and phenylisocyanate. The computational results agree with the experimental results reported by Bloodworth and Davies. The computational investigation also provided further insight into the interaction mechanism. The investigations
在氨基甲酸酯的生产中,有机锡催化剂用于催化异氰酸酯和醇的反应。因此,重要的是了解催化的机理,以更好地控制反应以获得最终产物的特定性能。到目前为止,所提出的与有机锡催化氨基甲酸酯形成有关的机理是基于Bloodworth和Davies(1965)提出的关于三烷基锡醇盐与异氰酸苯酯之间反应的机理。在目前的工作中,使用计算和实验方法来研究三烷基锡醇盐和苯基异氰酸酯之间的相互作用。计算结果与Bloodworth和Davies报告的实验结果一致。计算研究还提供了对相互作用机制的进一步了解。研究表明,异氰酸酯氧最初被吸引到有机锡醇盐的锡原子上,随后发生插入反应以形成有机锡O-氨基甲酸酯(甲基三丁基锡烷基苯基碳亚氨酸甲酯),然后重排形成有机锡N-氨基甲酸酯(甲基苯基)。 (三丁基锡烷基)氨基甲酸酯)。使用三烷基锡催化剂存在下的氨基甲酸酯形成的模型化合物研究13 C NMR和FT-IR数据表明该反应通过分子
A Fe<sub>3</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
/Schiff Base/Pd Complex as an Efficient Heterogeneous and Recyclable Nanocatalyst for One-Pot Domino Synthesis of Carbamates and Unsymmetrical Ureas
作者:Iman Dindarloo Inaloo、Sahar Majnooni
DOI:10.1002/ejoc.201901140
日期:2019.10.9
A palladium‐catalyzed domino method for the direct synthesis of carbamates and ureas has been developed by using readily available and economical starting materials (arylhalide, carbon monoxide, sodium azide, amines, and alcohols) in a one‐pot approach. This efficient and phosgene‐free process provided an inexpensive and attractive route to synthesize the products in good to excellent yields.
An Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/Schiff base/Cu(<scp>ii</scp>) complex as an efficient recyclable magnetic nanocatalyst for selective mono <i>N</i>-arylation of primary <i>O</i>-alkyl thiocarbamates and primary <i>O</i>-alkyl carbamates with aryl halides and arylboronic acids
the selective mono N-arylation of primary O-alkyl thiocarbamates and primary O-alkyl carbamates with aryl halides and arylboronic acids in the presence of a recyclable magnetic Cu(II) nanocatalyst is described. A variety of mono N-arylated O-alkyl thiocarbamates and O-alkyl carbamates were prepared in good to excellent yields with a broad range of aryl coupling partners. The magnetic nanocatalyst can