Palladium-Catalyzed Carbonylation Reaction of Aryl Bromides with 2-Hydroxyacetophenones to Form Flavones
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/chem.201202141
日期:2012.10.1
Flavone of the month: A general and efficient method for the palladium‐catalyzed carbonylativesynthesis of flavones has been developed (see scheme). Starting fromarylbromides and 2‐hydroxyacetophenones, the corresponding flavones have been isolated in good yields.
Synthetic approach to flavanones and flavones via ligand-free palladium(ii)-catalyzed conjugate addition of arylboronic acids to chromones
作者:Donghee Kim、Kyungrok Ham、Sungwoo Hong
DOI:10.1039/c2ob26061a
日期:——
The remarkable catalytic effects of Fe(OTf)3 in the context of the Pd(II)-catalyzed conjugate addition of arylboronic acids to chromones were observed to yield a variety of flavanones under mild conditions. The addition of catalytic amounts of DDQ and KNO2 to the reactions exclusively yielded flavone analogs. The reaction scope for the transformation was fairly broad, affording good yields of a wide range of flavanones and flavones, which are privileged structures in many biologically active compounds.