Patent ID: 6057474
Filing Date: 2000-05-02
Classification: C07C

Abstract:
Preparation process for .alpha.,.beta.-dicarbonylated compounds of formula (I) ##STR9## in which R.sub.2 represents an alkyl radical containing 1 to 6 carbon atoms, or a phenyl radical or a benzyl radical being able to be substituted in various ways on the cycle, or a carboxylic ester radical containing 2 to 5 carbon atoms, and R.sub.3 represents an alkyl radical containing 1 to 4 carbon atoms, or an alkoxy radical containing 1 to 4 carbon atoms, or a carboxylic ester radical containing 2 to 5 carbon atoms characterized in that an .alpha.,.gamma. dicarbonylated compound of formula (II) ##STR10## in which R.sub.1 represents an alkyl radical containing 1 to 6 carbon atoms, or an alkyl .alpha.-ketocarboxylate radical containing 3 to 6 carbon atoms or a carboxylic ester radical containing 2 to 5 carbon atoms, and R.sub.2 and R.sub.3 have the same meanings as previously is reacted in a nitrile solvent, with molecular oxygen in the presence of copper.sup.II nitrate or ferric chloride as catalyst.