Process for the preparation of spiroheterocyclic pyrrolidine diones

A compound of formula (I)

• wherein
• X, Y and Z independently of each other are C1-4alkyl, C3-6cycloalkyl, C1-4haloalkyl, C1-4alkoxy, C1-4haloalkoxy, halogen, cyano, C2-6alkenyl, C2-6alkynyl, phenyl, or phenyl substituted by C1-4alkyl, C1-4haloalkyl, halogen or cyano;
• m and n, independently of each other, are 0, 1, 2 or 3 and m+n is 0, 1, 2 or 3;
• A is hydrogen, C1-6alkyl, C1-6haloalkyl, C3-6cycloalkyl, C3-6cycloalkyl(C1-4)alkyl, C2-6alkenyl, C2-6haloalkenyl, C3-6alkynyl, C1-4alkoxy(C1-4)alkyl, benzyl, phenyl or phenyl substituted by C1-4alkyl, C1-4haloalkyl, C1-4alkoxy, C1-4haloalkoxy, halogen or cyano;
• and W is a group selected from W1 or W2;
• wherein R is hydrogen, C1-6alkyl, C1-6haloalkyl, C1-6cyanoalkyl, C2-6alkenyl, C2-6haloalkenyl, C3-6alkynyl, benzyl, C1-4alkoxy(C1-4)alkyl or C1-4alkoxy(C1-4)alkoxy(C1-4)alkyl;
• Q1 is phenyl or phenyl substituted by one or more substituent selected from the group consisting of C1-4alkyl, C1-4haloalkyl, C1-4alkoxy, halogen, and nitro;
• and
• Q2 is hydrogen.