Optionally substituted 2-nitro-3-phenylbenzofuranalkanoic and -alkenoic acids which are active as antimicrobial agents, processes for their preparation and intermediates therefor are described.
Methyl-substituted-2-nitro-3-phenylbenzofurans are prepared from methyl-substituted-3-phenylbenzofurans and are found to be useful antimicrobial agents.
Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent
作者:Zhanwei Ma、Min Zhou、Lin Ma、Min Zhang
DOI:10.1177/1747519820907244
日期:2020.7
acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare
Abstract A one-pot synthesis of functionalized benzofurans has been developed via O-alkylation, carbon–carbon coupling/cyclization, and dehydration/olefination tandem reactions from phenacyl bromide and phenols undermicrowaveirradiation and solvent-freeconditions in the presence of mineral-supported reagent and inorganic base. The best selectivity for forming benzofuran product has been achieved