Nickel-catalyzed direct alkynylation of azoles with alkynyl bromides.
The direct C-H alkynylation of azoles with alkynyl bromides proceeds efficiently in the presence of a nickel-based catalyst system. The reaction enables the introduction of various alkynyl groups bearing aryl, alkenyl, alkyl, and silyl substituents to the azole cores. In some cases, addition of a catalytic amount of CuI is observed to accelerate the direct coupling dramatically.
Matsuyama
Naoto
N
Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
Hirano
Koji
K
Satoh
Tetsuya
T
Miura
Masahiro
M