Chemoselective Ru-Catalyzed Oxidative Lactamization <i>vs</i> Hydroamination of Alkynylamines: Insights from Experimental and Density Functional Theory Studies
作者:Andrés M. Álvarez-Constantino、Andrea Álvarez-Pérez、Jesús A. Varela、Giuseppe Sciortino、Gregori Ujaque、Carlos Saá
DOI:10.1021/acs.joc.2c02770
日期:2023.1.20
(lactamization) of aromatic alkynylamines with 4-picoline N-oxide as an external oxidant has been developed. This chemoselective process is very efficient to achieve medium-sized ε- and ζ-lactams (seven- and eight-membered rings) but not for the formation of common δ-lactams (six-membered rings). DFT studies unveiled the capital role of the chain length between the amine and the alkyne functionalities: