Metal-Free Oxidative Cyclization of<i>o</i>-Acylphenols for the Construction of 2-Aminobenzofuran-3(2<i>H</i>)-ones
作者:Hui Yu、Weihua Huang、Fengling Zhang
DOI:10.1002/ejoc.201301756
日期:2014.5
An efficient metal-free approach to the synthesis of 2-aminobenzofuran-3(2H)-ones has been developed. Using TBHP as an oxidant and I2 (or TBAI) as catalyst, 2-acylphenols were treated with secondary amines to provide 2-aminobenzofuran-3(2H)-one derivatives in moderate to good yields. A possible reaction pathway for the formation of 2-dimorpholinobenzofuran-3(2H)-one is also discussed herein.
TBHP/TBAI-Promoted Oxidative Cyclization of o-Acylphenols for the Construction of 2-Aryloxybenzofuran-3(2H)-ones
作者:Hui Yu、Fengling Zhang、Weihua Huang
DOI:10.1055/s-0033-1340672
日期:——
An efficient metal-free approach to 2-aryloxybenzofuranonefuran-3(2 H )-ones has been developed. Using tert -butyl hydroperoxide as oxidant and tetrabutylammonium iodide as catalyst, 2-acylphenols reacted with phenols to provide 2-aminobenzofuran-3(2 H )-one derivatives in moderate to good yields.
The insertion of arynes into the O-H bond of aliphatic carboxylic acids promoted by sodium carboxylates is described. The reactions led to the formation of aryl carboxylates in good yields with good chemoselectivities under mild conditions. (C) 2015 Elsevier Ltd. All rights reserved.