Phosphine-Free Hydrazone−Pd Complex as the Catalyst Precursor for a Suzuki−Miyaura Reaction under Mild Aerobic Conditions
作者:Takashi Mino、Yoshiaki Shirae、Masami Sakamoto、Tsutomu Fujita
DOI:10.1021/jo048107i
日期:2005.3.1
Glyoxal bis(N-methyl-N-phenylhydrazone) (1) and its related compounds such as 2-pyridine-carboxaldehyde N-methyl-N-phenylhydrazone (3) were prepared and examined as ligands for the Suzuki-Miyaura cross-coupling reaction of aryl halides and arylboronic acids. We found phosphine-free catalysts, such as Pd(OAc)(2)/hydrazone ligand 1 or 3, to be efficient catalysts for a variety of substrates to produce the coupling products in good yields.