Patent ID: 6218565
Filing Date: 2001-04-17
Classification: C07C

Abstract:
A process for preparing a N-(3-amino-4-fluoro-phenyl)-sulphonamide, a N-(3-amino4-fluoro-phenyl)-carboxamide or a N-(3-amino-4-fluoro-phenyl)-carbamate of the general formula (I) ##STR14##whereinA represents SO.sub.2, CO or CO.sub.2 andR represents in each case unsubstituted or substituted alkyl or aryl,comprising the step of reacting a 1-fluoro-2,4-diamino-benzene of the formula (II) ##STR15##or an acid adduct thereof,with a sulphonyl chloride, a carbonyl chloride or a chloroformic ester of the general formula (III) ##STR16##whereinA and R are as defined abovein the presence of an acid acceptor and in the presence of a diluent at a temperature between -20.degree. C. and +100.degree. C.