Efficient synthesis of 5-nitro-benzo[b]furans via 2-bromo-4-nitro-phenyl acetates
作者:Antonella Bochicchio、Lucia Chiummiento、Maria Funicello、Maria Teresa Lopardo、Paolo Lupattelli
DOI:10.1016/j.tetlet.2010.03.072
日期:2010.5
Acetylation/Sonogashira cross-coupling reaction/cyclization has been carried out in one-pot using a Na2PdCl4/2-(di-tert-butylphosphino)-N-phenylindole/Cul system in TMEDA to give 5-nitro-2-substituted benzo[b]furans in excellent yields. We also describe the extension of this method to 4-EWG-2-bromophenols obtaining 2,5-disubstituted-benzo[b]furans in good yields. (C) 2010 Elsevier Ltd. All rights reserved.