'process for the preparation of n- (3-starch-4-fluor-phenyl) -sulfonic acid amides, n- (3-starch-4-fluor-phenyl) -carbonic acid and n- (3-starch) -4-fluorine-phenyl) -carbamates '

摘要

Invention Patent: B "PROCESS FOR THE PREPARATION OF N - (3 - AMINO - 4 - FLUOR - PHENYL) ACID STARCHES - SULPHENIC, N - (3 - AMINO - 4 - FLUOR - FENIL) - CARBOXYLIC EN - (3 - AMINO - 4 - FLUOR - PHENYL) - CARBAMATES "D. The invention relates to a process for the preparation of N - (3 - amino - 4 - fluorine - phenyl) - sulfonamides, N - (3 - amino - 4 - fluorine - phenyl) - carboxylic acid amides or N - (3 - amino - 4 - fluorine - phenyl) - carbamates of the general formula (I) in which A represents SO ~ 2 ~, CO or CO ~ 2 ~ and R represents alkyl or aryl, in each case, eventually substituted, in reacting 1 - fluorine - 2,4 - diamino-benzene of formula (II) with sulfonic acid chlorides, carboxylic acid chlorides or chloroformic acid esters of general formula (III) in which A and R have the meanings indicated above , in the presence of an acid acceptor and in the presence of a diluting agent, at temperatures between - 20 ° C and + 100 ° C.