Cyclic and acyclic enamines of pyrrolidine react with imidate 2 and α,β-insaturated orthoesters 3 to give 3-(2-oxoalkyl or oxocycloalkyl) propioimidates 4 and orthopropioimidates 5 respectively. The yields range from 50 to 70 %. The structure of these fonctionalized ketones is confirmed by IR and NMR spectroscopy.
A. Hafidh, M.L. El Efrit, H. Zantour, B. Baccar