Preparation of .alpha.-acyloxycarbonyl compounds
AssigneeEastman Kodak Company
InventorJoseph R. Zoeller
Life of this patent
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Abstract
Disclosed is a process for the preparation of .alpha.-acyloxycarbonyl compounds by contacting the corresponding .alpha.-dicarbonyl compound with an acyl iodide, which can be employed in an essentially pure form or generated in solution from hydrogen iodide and a carboxylic acid anhydride.
Claims6
Process for the preparation of an .alpha.-acyloxycarbonyl compound which comprises contacting an .alpha.-dicarbonyl compound with at least 2 moles of an acyl iodide per mol of .alpha.-dicarbonyl compound, wherein acyl is carboxylic acid acyl.
Process for the preparation of an .alpha.-acyloxycarbonyl compound having the formula ##STR3## which comprises contacting an .alpha.-dicarbonyl compound having the formula ##STR4## with at least 2 moles of an acyl iodide per mole of .alpha.-dicarbonyl compound in the presence of a carboxylic acid, wherein acyl is carboxylic acid acyl and wherein R.sup.1 and R.sup.2 each represents an alkyl radical, an aryl radical, an alkoxy radical or an aryloxy radical or R.sup.1 and R.sup.2 in combination represent an alkylene radical, an oxyalkylene radical or an oxyalkyleneoxy radical and R.sup.3 represents carboxylic acid acyl of up to about 4 carbon atoms.
Process for the preparation of an .alpha.-acetoxycarbonyl compound having the formula ##STR5## which comprises contacting an .alpha.-dicarbonyl compound having the formula ##STR6## with at least 2 moles of an acetyl iodide per mole of .alpha.-dicarbonyl compound in the presence of acetic acid wherein R.sup.1 and R.sup.2 each represents an alkyl radical, an aryl radical, an alkoxy radical or an aryloxy radical or R.sup.1 and R.sup.2 in combination represent an alkylene radical, an oxyalkylene radical or an oxyalkyleneoxy radical.
Dependencies are inferred from the claim text.