A facile transformation of alkynes into α-amino ketones by an N-bromosuccinimide-mediated one-pot strategy
作者:Ting Wei、Yongming Zeng、Wei He、Lili Geng、Liang Hong
DOI:10.1016/j.cclet.2018.03.031
日期:2019.2
Abstract A faciletransformation of alkynes into α-amino ketones by an N-bromosuccinimide-mediated one-pot cascade strategy is described. A variety of α-amino ketones are obtained in moderate to good yields under mild conditions. To overcome the multi-step synthesis, N-bromosuccinimide is involved in multiple tasks, playing a key role in the reaction course.
Metal-catalyzed reactions of ynimides with alcohols to afford β-ketoimides and oxazoles are demonstrated. The triple bond of ynamides is generally activated by mineral acids or metal salts to lead to the regioselective addition of nucleophiles at the α-C-atom, because of the inherent electronic bias. In contrast, the two neighboring carbonyl groups of ynimides decrease the electron density of the triple