A 5-sulphonamido-1-aryl-pyrazole of the formula (I) ##STR1## in which R.sup.1 represents hydrogen, nitro, nitroso or halogen, PA0 R.sup.2 represents hydrogen, alkyl or a radical R.sup.3 --SO.sub.2 --, or an inorganic or organic cation bonded in the form of a salt, PA0 R.sup.3 represents alkyl, alkenyl, cycloalkyl, halogeno-alkyl, hydroxyalkyl, alkoxyalkyl or unsubstituted or substituted aryl, PA0 R.sup.4 and R.sup.6 independently of one another represent cyano, nitro, halogen, alkyl, alkoxy, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or a radical --(O).sub.n --R.sup.9 and PA0 R.sup.5, R.sup.7 and R.sup.8 independently of one another and of R.sup.4 and R.sup.6 represent the same radicals as R.sup.4 and R.sup.6, and additionally represent hydrogen, wherein PA0 R.sup.9 represents alkyl, halogenoalkyl, amino, alkyl-amino or dialkylamino and PA0 n represents the number 0, 1 or 2. Such 5-sulphonamido-1-aryl-pyrazole being useful as a herbicide.

BACKGROUND OF THE INVENTION 
The invention relates to new 5-sulphonamido-1-aryl-pyrazoles, several 
processes for their preparation and their use as herbicides. 
It is already known that certain 1-aryl-pyrazoles, such as, for example, 
4-cyano-5-propionamido-1-(2,3,4-trichlorophenyl)-pyrazole, have herbicidal 
properties, and in particular also selectively herbicidal properties 
(compare, for example, DE-OS (German Published Specification) No. 
3,226,513). 
The herbicidal activity of these already known 1-aryl-pyrazoles against 
harmful plants is, however, like their tolerance towards important crop 
plants, not always completely satisfactory in all fields of use. 
SUMMARY OF THE INVENTION 
New 5-sulphonamido-1-aryl-pyrazoles according to the present invention are 
of the general formula (I) 
##STR2## 
in which R.sup.1 represents hydrogen, nitro, nitroso or halogen, 
R.sup.2 represents hydrogen, alkyl or a radical R.sup.3 --SO.sub.2 --, or 
an inorganic or organic cation bonded in the form of a salt, 
R.sup.3 represents alkyl, alkenyl, cycloalkyl, halogenoalkyl, hydroxyalkyl, 
alkoxyalkyl or in each case unsubstituted or substituted aryl, 
R.sup.4 and R.sup.6 independently of one another represent cyano, nitro, 
halogen, alkyl, alkoxy, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or a 
radical --S(O).sub.n --R.sup.9 and 
R.sup.5, R.sup.7 and R.sup.8 independently of one another and of R.sup.4 
and R.sup.6 represent the same radicals as R.sup.4 and R.sup.6, and 
additionally represent hydrogen, 
wherein 
R.sup.9 represents alkyl, halogenoalkyl, amino, alkylamino or dialkylamino 
and 
n represents the number 0, 1 or 2. 
It has furthermore been found that the new 5-sulphonamido-1-aryl-pyrazoles 
of the general formula (I) 
##STR3## 
in which R.sup.1 represents hydrogen, nitro, nitroso or halogen, 
R.sup.2 represents hydrogen, alkyl or a radical R.sup.3 --SO.sub.2 --, or 
an inorganic or organic cation bonded in the form of a salt, 
R.sup.3 represents alkyl, alkenyl, cycloalkyl, halogenoalkyl, hydroxylkyl, 
alkoxyalkyl or in each case unsubstituted or substituted aryl, 
R.sup.4 and R.sup.6 independently of one another represent cyano, nitro, 
halogen, alkyl, alkoxy, alkoxycarbonyl, halogenoalkyl, halogenoalkoxy or a 
radical --S(O).sub.n --R.sup.9 and 
R.sup.5, R.sup.7 and R.sup.8 independently of one another and of R.sup.4 
and R.sup.6 represent the same radicals as R.sup.4 and R.sup.6, and 
additionally represent hydrogen, 
wherein 
R.sup.9 represents alkyl, halogenoalkyl, amino, alkylamino or dialkylamino 
and 
n represents the number 0, 1 or 2, 
are obtained by a process in which 
(a) 5-aminopyrazoles of the formula (II) 
##STR4## 
in which R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 have the 
abovementioned meaning, are reacted with sulphonyl chlorides of the 
formula (III) 
##STR5## 
in which R.sup.3 has the abovementioned meaning, if appropriate in the 
presence of a diluent and if appropriate in the presence of an 
acid-binding agent, or in which 
(b) the bisulphonylamines obtainable according to the process (a), of the 
formula (Ia) 
##STR6## 
in which R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 have the 
abovementioned meaning, are split with bases, if appropriate in the 
presence of a diluent, or in which 
(c) the 5-sulphonamido-pyrazoles obtainable according to process (a) or 
(b), of the formula (Ib) 
##STR7## 
in which R.sup.2' represents hydrogen or a radical R.sup.3 --SO.sub.2 -- 
and R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 have the 
abovementioned meaning, are subjected to substitution in the 4-position 
with electrophilic agents of the formula (IV) 
EQU R.sup.1' --E (IV) 
in which 
R.sup.1' represents halogen, nitroso or nitro and 
E represents an electron-withdrawing leaving grouping, 
if appropriate in the presence of a diluent and if appropriate in the 
presence of a catalyst or reaction auxiliary, or in which 
(d) the 5-sulphonamido-pyrazoles obtainable according to process (a), (b) 
or (c), of the formula (Ic) 
##STR8## 
in which R.sup.1, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 
have the abovementioned meaning, either 
(i) are alkylated on the nitrogen atom of the sulphonamido group with 
alkylating agents of the formula (V) 
EQU R.sup.2" --E' (V) 
in which 
R.sup.2" represents alkyl and 
E' represents an electron-withdrawing leaving group, 
if appropriate in the presence of a diluent and if appropriate in the 
presence of an acid-binding agent or catalyst, or 
(ii) forms a salt on the nitrogen of the sulphonamido group with compounds 
of the formula (VI) 
EQU M.sup..sym. G.sup..crclbar. (VI) 
in which 
M.sup..sym. represents one equivalent of an inorganic or organic cation and 
G.sup..crclbar. represents one equivalent of a suitable counterion, 
or with primary, secondary or tertiary amines, if appropriate in the 
presence of a diluent. 
Finally, it has been found that the new 5-sulphonamido-1-aryl-pyrazoles of 
the general formula (I) have herbicidal properties, and in particular also 
selectively herbicidal properties.