Patent ID: 6570035
Filing Date: 2003-05-27
Classification: C07C

Abstract:
A process for producing a pivaloylacetic acid ester which comprises reacting pivaloyl chloride represented by the following chemical formula (I): with an acetoacetic acid ester represented by the following general formula (II): wherein R1 represents an alkyl group having 1 to 4 carbon atoms; in the presence of at least one nitrogen-containing basic compound (a) selected from the group consisting of pyridine compounds, N,N-dialkylanilines and imidazole compounds and from 0.01 to 0.5 mole equivalent, based on the pivaloyl chloride, of a magnesium compound (b) to thereby prepare a pivaloylacetoacetic acid ester represented by the following general formula (III): wherein R1 represents an alkyl group having 1 to 4 carbon atoms; and then alcoholyzing or alkali-hydrolyzing the pivaloylacetoacetic acid ester to thereby give a pivaloylacetic acid ester represented by the following general formula (IV): wherein R1 represents an alkyl group having 1 to 4 carbon atoms.