| 摘要 |
The invention relates to novel herbicidally active compounds of formula I <IMAGE> I in which B represents an imidazolone of formula <IMAGE> or A and B together represent a fused imidazolone of formula <IMAGE> and the radicals X, R1, R2 and A in addition have the meanings given in the text and R3 represents C1-C4-alkyl and R4 represents a methyl or ethyl group subtituted by from 1 to 5 fluorine atoms, processes for the preparation thereof, compositions containing compounds of formula I, methods of controlling weeds, and novel intermediates for the preparation of the compounds of formula I. |
