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.
已开发出一种有效的无金属方法来制备 2-芳氧基苯并呋喃酮呋喃-3(2 H )-ones。使用叔丁基氢过氧化物作为氧化剂和四丁基碘化铵作为催化剂,2-酰基苯酚与苯酚反应以中等至良好的产率提供2-氨基苯并呋喃-3(2 H )-酮衍生物。
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.