| 摘要 |
<p>Process for the preparation of compounds having the formula:$(10,)$wherein R is a straight or branched alkyl group, having from 1 to 6 atoms of carbon or a phenyl group, characterized in that a hydrazone is reacted within an aprotic polar solvant and at a temperature comprised between 0oC and the solvant boiling temperature, in presence of a base, said hydrazone having the formula:$(10,)$wherein R has the same meaning as in the formula (I), with an acetyl halide or an acetic acid ester having the formula:$(3,)$wherein X represents a halogen atom or a lower alkoxy group. The compounds of formula (I) are particularly useful for the preparation of drugs.</p> |
