A CuCl2 center dot H2O-catalyzed tandem reaction of 2-iodophenol with isothiocyanate in water is described, which provides an environmentally benign, efficient, and practical route for the generation of 2-iminobenzo-1,3-oxathiole. It was noteworthy that most of the products were easily separated from the reaction system by simple filtration. (C) 2011 Elsevier Ltd. All rights reserved.
Copper(I)-catalyzed tandem reaction of 2-iodophenols with isothiocyanates in room temperature ionic liquids
作者:Fang Yao、Wenyan Hao、Ming-Zhong Cai
DOI:10.1016/j.jorganchem.2012.09.010
日期:2013.1
A copper(I)-catalyzed tandem reaction of 2-iodophenols with isothiocyanates in hydrophobic [ bmim] [PF6] ionic liquid was described, which proceeded smoothly and generated a variety of 2-iminobenzo-1,3-oxathioles in good to excellent yields. The tandem reaction that was carried out in [ bmim][ PF6] has some obvious advantages such as reaction rate acceleration and yield increasing as compared with the reaction run in volatile solvents such as toluene. Furthermore, the CuI/1,10-phenanthroline catalytic system can be reused up to 6 times without loss of activity and efficiency. (C) 2012 Elsevier B. V. All rights reserved.
Copper/<i>N,N,N′,N′</i>-Tetramethylethylenediamine-Catalyzed Synthesis of<i>N</i>-Substituted Benzoheterocycles<i>via</i>CS Cross- Coupling at Ambient Temperature in Water
作者:Na Zhao、Liang Liu、Fei Wang、Jia Li、Wu Zhang
DOI:10.1002/adsc.201400043
日期:2014.8.11
AbstractCopper/N,N,N′,N′‐tetramethylethylenediamine (Cu/TMEDA)‐catalyzed ambient temperature tandem reactions of isothiocyanates with 2‐iodophenols or 2‐iodoanilines in water without the protection of an inert atmosphere are described, which provide a simple, rapid, environmental method for the synthesis of a variety of 2‐iminobenzo‐1, 3‐ oxathioles and 2‐aminobenzothiazoles in good yields. More important, the present reaction process needs only low amounts of copper catalyst (<1 mol%) and can yield the products on a gram scale.magnified image