摘要:
The disclosure relates to compounds of formula (I) in which X stands for O, S, SO, SO2, CRaRb or N(O), Y stands for an atom or chain of 2-4 atoms which is optionally substituted, and R?a, Rb, Rc, R1, R2, R3, R4¿ are defined as per claim 1. These compounds are suitable for use as heribicides or plant-growth regulators. They can be produced in a way analogous to known processes as these are defined in claim 6 via intermediate products of formulae II-VI, some of which are novel.