Efficient synthesis of 5-nitro-benzo[b]furans via 2-bromo-4-nitro-phenyl acetates
摘要:
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.
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.
GRINEV A. N.; ZOTOVA S. A.; STOLYARCHUK A. A.; GOLENKO-YAROSHEVSKIJ P. A.+, XIM-FARMATSEVT. ZH., 1977, 11, HO 3, 33-37
作者:GRINEV A. N.、 ZOTOVA S. A.、 STOLYARCHUK A. A.、 GOLENKO-YAROSHEVSKIJ P. A.+