Categories: C-N Bond Formation > Enamines

Synthesis of enaminones

Recent Literature

Ceric ammonium nitrate catalyzes the reaction between aromatic or aliphatic primary amines and a variety of β-dicarbonyl compounds, including β-ketoesters, β-ketothioesters and β-diketones to give β-enaminones in good to excellent yields at room temperature in short reaction times.
V. Sridharan, C. Avendaño, J. Carlos Menéndez, Synlett, 2007, 2133-2142.

Mechanochemical grinding in the presence of KHSO₄ and SiO₂ enables a facile amination of solid 1,3-dicarbonyl compounds with ammonium salts or amines in solid state to yield the corresponding β-imino derivatives in high yields. The method has the advantage of simple manipulation and mild conditions.
S.-L. Xu, C.-P. Li, J.-H. Li, Synlett, 2009, 818-822.

The coupling of acid chlorides with terminal alkynes using one equivalent of triethylamine under Sonogashira conditions followed by subsequent addition of amines or amidinium salts to the intermediate alkynones allows a straightforward access to enaminones and pyrimidines under mild conditions and in excellent yields.
A. S. Karpov, T. J. J. Müller, Synthesis, 2003, 2815-2826.