Patent ID: 6150521
Filing Date: 2000-11-21
Classification: C07D

Abstract:
A process for preparing a compound of the formula (I): in whichA represents alkyl;R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent hydrogen, halogen, cyano, nitro, alkyl, alkoxy, alkylthio, alkylsulphinyl, alkylsulphonyl, halogenoalkyl, halogenoalkoxy, halogenoalkylthio, halogenoalkylsulphinyl or halogenoalkylsulphonyl;Z.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 independently represent hydrogen, alkyl, halogenoalkyl or hydroxyalkyl; orZ.sup.1 and Z.sup.2 or Z.sup.1 and Z.sup.3 or Z.sup.3 and Z.sup.4 together with the carbon atoms to which they are attached form a cycloaliphatic ring having 5 to 7 carbon atoms;said process comprising rearranging an O-hydroxyethyl-O'-methyl-benzofurandione dioxime of the formula (II): ##STR50## in which A, R.sup.1, R.sup.2, R.sup.3, R.sup.4, Z.sup.1, Z.sup.2, Z.sup.3 and Z.sup.4 have the meaning indicated above;said rearranging optionally being carried out in the presence of a diluent and optionally in the presence of an acid or a base.