Amino or nitro derivatives of benzoxazole-2-one and benzoxazin-3-one

Abstract From the Canadian patent

The invention provides compounds of the formula: wherein R1 is a hydrogen atom, a C1-C5 alkyl group a C3-C4 alkenyl group, a C3-C4 alkynyl group a, C1-C4 haloalkyl group, a C3-C4 haloalkenyl group a C3-C4 haloalkynyl group, a C1-C2 alkoxy (C1-C2) alkyl group or a C1-C2 alkoxy-(C1-C2) alkoxy(C1-C2)alkyl group, R2 and R3, which may be the same or different, each represents a hydrogen atom a, halogen atom, a C1-C3 alkyl group or a phenyl group X, is a hydrogen atom, a chlorine atom or a fluorine atom n, is an integer of 0 or 1 and A is an amino group on a nitro group. These compounds are useful as starting compounds in the preparation of tetrahydrophthalimides. The tetrahydrophthalimides are …