N-aryltetrahydrophthalimide derivatives and intermediates therefor

Abstract From the Canadian patent

O.Z. 0050/38307, Abstract of the Disclosure: N-aryltetrahydrophthalimide derivatives and intermediates therefor of the general formula I, (I), where, A is O2N-, H2N- or corresponding, to compounds Ia, Ib and Ic R1 is hydrogen, fluorine or chlorine, R2 is hydrogen or cyano R3 is C1-C6-alkyl, C2-C6-alkenyl or C2-C6-alkynyl which each may be substituted by halogen or C1-C4-alkoxy or is C1-C3-alkyl, which may be substituted by C3-C8alkenyl, C3-C8-alkynyloxycarbonyl or C2-C10-alkoxycarbonyl which may be substituted in the alkoxy moiety by C1-C4-alkoxy, halogen or phenyl, and herbicides which contain compounds of the farmula Ic.