2,3-dihydro-4-oxo-4h-1,3-oxazine and 2-oxo-1,2,5,6-tetrahydropyridine derivatives and their use as herbicides

摘要

Compounds of formula (I): ```wherein R1, R2, R3, R4, R5, X and Y are as defined in the specification, are useful as herbicides. Intermediates of formula (II),(IV),(VI),(X) and (XII) useful in their preparation are novel compounds.