Palladium(II)-Catalyzed Transformation of 3-Alkylbenzofurans to [2,3'-Bibenzofuran]-2'(3'H)-ones: Oxidative Dimerization of 3-Alkylbenzofurans.
An unprecedented oxidative dimerization by palladium catalysis has been developed using PhI(OPiv)2as a by-standing oxidant. This provides a facile method for the synthesis of quaternary 2,3'-bibenzofuran-2'(3')-ones from readily accessible substrates. A plausible mechanism involving a Pd(II)-Pd(IV) catalytic cycle is proposed; a trace amount of water is required for subsequent oxidation.
Department of Chemistry, College of Natural Sciences, Seoul National University , Seoul 08826, Korea.
Beom Shin
BS
Cho
Department of Chemistry, College of Natural Sciences, Seoul National University , Seoul 08826, Korea.
Young Keun
0000-0002-2837-5176
YK
Chung