A stereoselective synthesis of αβ-unsaturated ketones by direct addition of Grignard reagents to β-enamino ketones, mediated by dry cerium(III) chloride, is described and a trans relationship between the introduced framework and the carbonyl group is predominantly observed.
G. Bartoli, C. Cimarelli, E. Marcantoni, G. Palmieri and M. Petrini, J. Chem. Soc., Chem. Commun., 1994, 715 DOI: 10.1039/C39940000715
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