Patent ID: 7094594
Filing Date: 2006-08-22
Classification: C07D,C12P

Abstract:
1. A production process of a following compound (I); in the formula, R 1 represents a hydrogen, an alkyl group of 1 to 12 carbon atoms, an aryl group of 6 to 12 carbon atoms, or an aralkyl group of 7 to 12 carbon atoms; R 2 and R 3 each independently represents a hydrogen, an alkyl group of 1 to 12 carbon atoms, an aryl group of 6 to 12 carbon atoms, or an aralkyl group of 7 to 12 carbon atoms, and R 2 and R 3 may jointly form a ring, which comprises (1) reacting an enolate prepared by permitting a base or a 0-valent metal to act on an acetic acid ester derivative represented by the following formula (II);  in the formula, R at a temperature not lower than −30° C. to produce a compound represented by the following formula (IV);  in the formula, R and (5) subjecting this compound to solvolysis in the presence of a base to form the compound formula (I).