Disclosed is a new, catalytic, and general methodology for the chemical synthesis of biaryl, heterobiaryl, and polyaryl molecules by the cross-coupling of o-methoxybenzamides with aryl boroneopentylates. The reaction is based on the activation of the unreactive C-OMe bond by the proximate amide directing group using catalytic RuH2(CO)(PPh3)3 conditions. A one-step, base-free coupling process is thereby
Beyond Directed <i>ortho</i> Metalation: Ruthenium-Catalyzed Amide-Directed C<sub>Ar</sub>–OMe Activation/Cross-Coupling Reaction of Naphthamides with Aryl Boronates
作者:Yigang Zhao、Victor Snieckus
DOI:10.1021/acs.orglett.5b01913
日期:2015.10.2
A new and general synthetic methodology for the construction of biaryl, heterobiaryl, and polyaryl molecules by the ruthenium-catalyzed cross-coupling of ortho-methoxy naphthamides with aryl boroneopentylates is described. The isomeric 1-MeO-2-naphthamides and 2-MeO-1-naphthamides furnish an expansive series of arylated naphthamides in excellent yields. Competition experiments showed the higher reactivity