Patent ID: 7291580

Claim:
A compound of the formula I wherein Y represents −CF 2 (C 1 -C 3 alkyl); and W represents −NO 2 , −N 3 , −NR 1 R 2 , −N═CR 3 R 4 or −NHN═CR 3 R 4 wherein R 1 and R 2 independently represent H, C 1 -C 6 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, aryl, heteroaryl, hydroxy, C 1 -C 6 alkoxy, amino, C 1 -C 6 acyl, C 1 -C 6 carboalkoxy, C 1 -C 6 alkylcarbamyl, C 1 -C 6 alkylsulfonyl, C 1 -C 6 trialkylsilyl or C 1 -C 6 dialkyl phosphonyl or R 1 and R 2 taken together with N represent a 5- or 6-membered saturated or unsaturated ring which may contain additional O , S or N heteroatoms; and R 3 and R 4 independently represent H, C 1 -C 6 alkyl, C 3 -C 6 alkenyl, C 3 -C 6 alkynyl, aryl or heteroaryl or R 3 and R 4 taken together with ═C represent a 5- or 6-membered saturated ring; and agriculturally acceptable derivatives of the carboxylic acid group.