Pyrimidin-5-ylsulfonamides

#The present invention relates to a group of novel sulfonylureas and sulfonylthioureas which have valuable growth regulating properties and which are suitable for selectively influencing plant growth, for the control of weeds e.g. in crops of useful plants and/or for influencing the phytotoxic properties of other herbicidal compounds. The invention also relates to the preparation of these sulfonylureas and sulfonylthioureas, and to agricultural compositions which contain them.

#Accordingly, the invention relates to compounds of the formula I ##STR2## wherein

#R.sub.1 is hydrogen or C.sub.1 -C.sub.5 alkyl,

#In the following Examples parts and percentages are by weight.

#The intermediates and final products listed in the following tables can be prepared in corresponding manner:

#TABLE 1 ______________________________________ QSO.sub.2NH.sub.2 Abbre- Compound Q viation Physical data ______________________________________ 1.1 ##STR10## Q 1 m.p. 109-110.degree. C. 1.2 ##STR11## Q 2 m.p. 115-120.degree. C. 1.3 ##STR12## Q 3 1.4 ##STR13## Q 4 1.5 ##STR14## Q 5 1.6 ##STR15## Q 6 1.7 ##STR16## Q 7 1.8 ##STR17## Q 8 1.9 ##STR18## Q 9 1.10 ##STR19## Q 10 1.11 ##STR20## Q 11 1.12 ##STR21## Q 12 1.13 ##STR22## Q 13 1.14 ##STR23## Q 14 1.15 ##STR24## Q 15 1.16 ##STR25## Q 16 1.17 ##STR26## Q 17 1.18 ##STR27## Q 18 1.19 ##STR28## Q 19 1.20 ##STR29## Q 20 1.21 ##STR30## Q 21 1.22 ##STR31## Q 22 1.23 ##STR32## Q 23 1.24 ##STR33## Q 24 1.25 ##STR34## Q 25 1.26 ##STR35## Q 26 1.27 ##STR36## Q 27 1.28 ##STR37## Q 28 1.29 ##STR38## Q 29 1.30 ##STR39## Q 30 1.31 ##STR40## Q 31 1.32 ##STR41## Q 32 1.33 ##STR42## Q 33 1.34 ##STR43## Q 34 1.35 ##STR44## Q 35 1.36 ##STR45## Q 36 1.37 ##STR46## Q 37 1.38 ##STR47## Q 38 1.39 ##STR48## Q 39 ______________________________________