| 摘要 |
A process for the preparation of compound (III), wherein R is selected from CF3, or C1 to C6 alkyl and metal is alkali or alkaline earth metal or silver, which comprises the reaction between a compound of general formula (V) and dicyanoacetylene (IV), said reaction carried out in the presence of water. <??>A process for the preparation of compound (VII) which comprises a first step of reaction of the arylhydrazine of formula (I) with a compound of general formula (III) to produce an intermediate compound of general formula (VI), and a second step which comprises the oxidation of the compound (VI), according to the reaction scheme below. <CHEM> <CHEM> |
