Palladium-catalyzed synthesis of benzofurans via C–H activation/oxidation tandem reaction and its application to the synthesis of decursivine and serotobenine
Palladium-Catalyzed α-Arylation of Aryloxyketones for the Synthesis of 2,3-Disubstituted Benzofurans
作者:Jin Ho Lee、Myungock Kim、Ikyon Kim
DOI:10.1021/jo500885w
日期:2014.7.3
A highly efficient palladium-catalyzed α-arylation of aryloxyketones has been developed, allowing for facile installation of various (hetero)aryl groups at C2 position in good to excellent yields. Subsequent cyclodehydration of the resulting α-arylated aryloxyketones provided rapid access to diverse 2,3-disubstitured benzofurans.
Friedel-Crafts alkylation oxidative cyclization catalyzed by co-oxidation of SeO<sub>2</sub> and FeCl<sub>3</sub>: a simple synthesis of benzo[<i>b</i>]furan from acetophenone and anisole
Abstract A simple one-pot method was developed to complete the α-diphenyl substitution and cyclization of acetophenone using acetophenone and substituted benzene as substrates, and a series of benzofuran derivatives was synthesized efficiently. It had the advantages of medium to excellent yield and easily obtained substrate. Compared with other methods, the method avoids the use of precious metals