Patent ID: 6087508
Filing Date: 2000-07-11
Classification: C07C,C07D

Abstract:
A process for the preparation of a compound of formula (I) ##STR13## comprising the steps of: (a) acetylating a compound of formula (IX) ##STR14## to obtain a (VIII) ##STR15## (b) nitrating the compound formula (VIII) to obtain a compound of formula (VII) ##STR16## (c) subjecting the compound of formula (VII) to a hydrogenation reaction followed by treatment with hydrogen chloride to obtain a compound formula (VI) ##STR17## (d) reacting the compound of formula (VI) with benzoyl isothiocyanate to obtain a compound of formula (V) ##STR18## (e) hydrolysing the compound of formula (V) to obtain a compound of formula (IV) ##STR19## (f) reacting the compound of formula (IV) with a halogenating/oxidizing agent to obtain a compound of formula (III) ##STR20## (g) chlorinating the compound of formula (III) to obtain a compound of formula (II) ##STR21## and (h) converting, in the presence of an acid, the compound of formula (II) into the compound of formula (I).