Ni- and Cu-Catalyzed Coupling Reactions Using 2-(4,5-Dihydro-1H-imidazo-2-yl)phenol as a Versatile Phosphine-Free Ligand
摘要:
We have disclosed 2-(4,5-dihydro-1H-imidazo-2-yl)phenol (1) worked efficiently as a ligand in Ni-catalyzed Suzuki-Miyaura coupling reactions and Cu-catalyzed N-cyclopropylation of indoles using cyclopropylboronic acid.
<i>N</i>-Cyclopropylation of Indoles and Cyclic Amides with Copper(II) Reagent
作者:Takayuki Tsuritani、Neil A. Strotman、Yuhei Yamamoto、Masashi Kawasaki、Nobuyoshi Yasuda、Toshiaki Mase
DOI:10.1021/ol800376f
日期:2008.4.1
Copper-mediated coupling reactions of cyclopropylboronic acid with indoles and cyclic amides are described. The process utilizes catalytic or stoichiometric amounts of copper(II) acetate, DMAP, and NaHMDS at 95 degrees C under an atmosphere containing oxygen. A variety of functional groups remain intact throughout the reaction.