Substituted 2-phenylpyridines useful as herbicides

摘要

PCT No. PCT/EP96/03243 Sec. 371 Date Jan. 20, 1998 Sec. 102(e) Date Jan. 20, 1998 PCT Filed Jul. 23, 1996 PCT Pub. No. WO97/06143 PCT Pub. Date Feb. 20, 1997Substituted 2-phenylpyridines I where n is 0, 1; R1 is halogen, C1-C6-haloalkyl; R2 and R3 are H, halogen; R4 is cyano, halogen; X and Y are -O-, -S-; R5 and R6 are H, C1-C4-alkyl or together are a 1,2-ethylene, 1,3-propylene, 1,4-tetramethylene or 1,5-pentamethylene chain; R7 is C1-C6-haloalkyl, C3-C6-haloalkenyl, C2-C6-alkenyloxy-C1-C4-alkyl, C2-C6-alkenyloxy-C1-C4-alkoxy-C1-C4-alkyl, C3-C6-alkenyl, C3-C6-alkadienyl, C3-C6-alkynyl, C3-C6-cycloalkyl, C5-C6-cycloalkenyl, 3-oxetanyl, 3-thietanyl, phenyl, phenyl-C1-C4-alkyl or 5/6-membered heteroaryl having 1 to 3 hetero atoms selected from the group consisting of two oxygen atoms, two sulfur atoms and 3 nitrogen atoms, or R6 and R7 together are a 1,2-ethylene or 1,3-propylene chain which can have attached to it one or two C1-C4-alkyl substituents are used as herbicides and for the desiccation/defoliation of plants.