One-pot sequential combination of multi-component and multi-catalyst: synthesis of 5-aminobenzofurans from aminophenol and ketene acetals
摘要:
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.
One-pot sequential combination of multi-component and multi-catalyst: synthesis of 5-aminobenzofurans from aminophenol and ketene acetals
摘要:
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.
Regioselective allylation of enaminones using CuCl2 as the catalyst to give C-allylated products is reported for the first time. The C-allylated products undergo hydrolysis followed by a rearrangement yielding beta-keto allyl enamides in excellent yields. (C) 2008 Elsevier Ltd. All rights reserved.