Copper-Mediated N-Cyclopropylation of Azoles, Amides, and Sulfonamides by Cyclopropylboronic Acid
摘要:
Reaction of azoles, amides, and sulfonamides in dichloroethane with readily available cyclopropylboronic acid in the presence of copper acetate and sodium carbonate afforded the N-cyclopropyl derivatives in good to excellent yields.
<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.