1.
Org Lett
; 15(7): 1560-3, 2013 Apr 05.
Artigo
em Inglês
| MEDLINE
| ID: mdl-23496249
RESUMO
Metal-catalyzed reactions of ynimides with alcohols to afford ß-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 bond and the nucleophiles attack the carbonyl C-atom.