Copper(ii)-catalyzed C–O coupling of aryl bromides with aliphatic diols: synthesis of ethers, phenols, and benzo-fused cyclic ethers
作者:Yajun Liu、Se Kyung Park、Yan Xiao、Junghyun Chae
DOI:10.1039/c4ob00649f
日期:——
copper-catalyzed C–O cross-coupling reaction between arylbromides and aliphatic diols has been developed employing a cheaper, more efficient, and easily removable copper(II) catalyst. A broad range of arylbromides were coupled with aliphatic diols of different lengths using 5 mol% CuCl2 and 3 equivalents of K2CO3 in the absence of any other ligands or solvents to afford the corresponding hydroxyalkyl aryl ethers
使用更便宜,更有效且易于去除的铜(II)催化剂,开发了一种高效的铜催化的芳基溴化物与脂肪族二醇之间的C-O交叉偶联反应。使用5 mol%的CuCl 2和3当量的K 2 CO 3将宽范围的芳基溴化物与不同长度的脂肪族二醇偶联在不存在任何其他配体或溶剂的情况下,以良好或优异的收率得到相应的羟烷基芳基醚。在这个新开发的方案中,脂族二醇具有多方面的功能,如偶联反应物,配体和溶剂。所得的羟烷基芳基醚进一步容易地转化成相应的苯酚,为从芳基溴化物得到的苯酚提供了一种有价值的替代方法。此外,已证明它们是用于更高级分子如苯并呋喃和苯并稠合的环醚的有用中间体。