A general and efficient Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones
摘要:
An efficient unprecedented Pd-catalyzed rapid 2-fluoroethoxylation of bromo-chalcones has been unveiled. The oxygen nucleophiles (fluoroalcohols) experience the rapid C-O bond forming reaction for the first time, albeit the alcohols are known to be a weak nucleophile and have greater competing beta-hydride elimination in the transition-metal-catalyzed (especially Pd and Cu) C-O cross-coupling reaction. The higher fluoroalcohols have also been effectively coupled with bromo-chalcones with relatively lower rate. (C) 2016 Elsevier B.V. All rights reserved.