-(QUINOXALIN-2-YL(OXY OR THIO) PHEN (OXY OR YLTHIO)-ALKANOIC ACID DERIVATIVES OR PRECURSORS

摘要

The invention concerns novel compounds of the formula I CHEM The compounds are herbicides and in further embodiments the invention provides processes for the preparation of compounds of formula I, intermediates useful in the preparation of compounds of formula I, herbicidal compositions containing as active ingredient a compound of formula I, and processes for severely damaging or killing unwanted plants by applying to the plants or to the growth medium of the plants an effective amount of a compound of formula I.