The invention embraces compounds of formula ##STR1## and salts thereof, wherein: X and Y are independently selected from various optionally substituted alkoxy, alkenyloxy, alkynyoxy and phenoxy groups; W is oxygen or sulfur; R.sub.1 is hydrogen or alkyl; E is CH or N; R.sub.2 and R.sub.3 are independently selected from various halo, alkyl, alkoxy and amino substituents. The compounds of the invention show herbicidal properties particularly for the control of broad leaf plants in grass crops such as wheat. In further embodiments the invention provides processes for the preparation of compounds I, intermediates useful in the preparation of compounds of formula I, compositions containing as active ingredient a compound of formula I and herbicidal and plant growth regulating processes utilizing compounds of formula I.
该发明涵盖了式子##STR1##及其盐,其中:X和Y分别选自各种可选择的取代烷氧基、烯氧基、炔氧基和苯氧基;W为氧或
硫;R.sub.1为氢或烷基;E为CH或N;R.sub.2和R.sub.3分别选自各种卤素、烷基、烷氧基和
氨基取代基。该发明的化合物显示出除草特性,特别适用于控制小麦等草本作物中的阔叶植物。在进一步的实施例中,该发明提供了制备化合物I的方法,用于制备式I的中间体,含有化合物I作为活性成分的组合物,以及利用式I的化合物进行除草和植物生长调节的过程。