PHENYL-AND PYRIDYLSULFONYLUREAS AND-PSEUDOTHIOUREAS,THEIR PREPARATION AND THEIR USE AS HERBICIDES

摘要

Sulfonamides of the general formula RSO2N@NHR1 (I) or CHEM wherein R is optionally substituted phenyl or optionally substituted pyridyl; CHEM R12 is selected from various organic groups; X is H, CH3, CH3O, Cl or OCH2CH3; Y is CH2 or O; and W is O or S; and their agriculturally suitable salts, exhibit herbicidal activity. The compounds can be formulated into herbicidal compositions in conventional manner. The compounds of formula I may made by reacting a corresponding sulfonyl thiocyanate or isothiocyanate of the formula RSO2NCW with an appropriate aminopyrimidine derivative. The compound of formula II may be made by appropriate alkylation of an alkali metal or alkaline earth metal salt of a corresponding sulfonylthiourea.