THE DIRECT SYNTHESIS OF α,β-UNSATURATED CARBONYL COMPOUNDS BY Pd(II) PROMOTED DEHYDROGENATION OF ALDEHYDES AND KETONES

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Abstract
α,β-Unsaturated aldehydes are prepared by the direct dehydrogenation of the corresponding saturated aldehydes by the coupled use of PdCl2(PhCN)2–AgOSO2CF3 in the presence of N-methylmorpholine in good yields. α,β-Unsaturated ketones are also prepared via the Sn(II) enolate by a one-pot procedure from the corresponding saturated ketones.