One-pot sequential combination of multi-component and multi-catalyst: synthesis of 5-aminobenzofurans from aminophenol and ketene acetals
作者:Cheng-Wen Yang、Yue-Xia Bai、Ni-Tao Zhang、Cheng-Chu Zeng、Li-Ming Hu、Hong-Yu Tian
DOI:10.1016/j.tet.2012.09.090
日期:2012.12
The reaction between p-aminophenols 1 and various ketene acetals 2 in the presence of hypervalent iodine is described. The results show that 2- and 3-substituted 5-sulfonamidobenzofurans 3 are obtained in moderate to good yields from p-aminophenols and ketene acetals. (C) 2012 Elsevier Ltd. All rights reserved.