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.
Selective Synthesis of Secondary Arylcarbamates via Efficient and Cost Effective Copper-Catalyzed Mono Arylation of Primary Carbamates with Aryl Halides and Arylboronic Acids
An efficient, selective and cost-effective procedure has been developed for mono N-arylation of primary alkyl and benzyl carbamates with aryliodides and bromides by incorporating CuI as an inexpensive and commercially available catalyst. Despite previous reports on C–N coupling reactions, this process does not need expensive ligands and takes advantage of readily available and inexpensive ethylenediamine
通过引入 CuI 作为廉价且市售的催化剂,已开发出一种高效、选择性和成本效益高的程序,用于伯烷基和苄基氨基甲酸酯与芳基碘化物和溴化物的单 N-芳基化。尽管之前有关于 C-N 偶联反应的报道,但该过程不需要昂贵的配体,并且利用容易获得且价格低廉的乙二胺 (EDA) 作为配体。反应时间相对较短,并且以极好的收率获得了相关的 N-芳基化氨基甲酸酯。有趣的是,用 Cu(OAc)2 代替 CuI 使我们能够使用芳基硼酸作为该反应的偶联伙伴。所有产品均通过 1H- 和 13C-NMR、MS、熔点、IR 和 CHNS 技术进行了充分表征。图形摘要
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
Carbon dioxide utilization in the efficient synthesis of carbamates by deep eutectic solvents (DES) as green and attractive solvent/catalyst systems
作者:Iman Dindarloo Inaloo、Sahar Majnooni
DOI:10.1039/c9nj02810b
日期:——
green and eco-friendly solvent/catalyst system based on a deep eutectic solvent (DES) was devised and developed for the simple synthesis of carbamates through three-component coupling of amines, alkyl halides and carbon dioxide (CO2). It was found that choline chloride:zinc(II) chloride ([ChCl][ZnCl2]2) was very proficient and effective for the activation and utilization of CO2 in carbamate formation
Ureas as safe carbonyl sources for the synthesis of carbamates with deep eutectic solvents (DESs) as efficient and recyclable solvent/catalyst systems
作者:Iman Dindarloo Inaloo、Sahar Majnooni
DOI:10.1039/c8nj02624f
日期:——
synthesis of primary, N-mono- and N-disubstituted carbamates is developed from ureas. The corresponding carbamates were produced at 120 °C, within 18 h, and in the presence of a deep eutectic solvent as a recyclable catalytic system. The catalyst can be reused for several runs without any reduction in its activity. To demonstrate the utility of this approach, a wide variety of alcohols and phenols were