Herbicidal pyridinesulfonamides

Claim 1

A compound of the formula I or II ##STR92## wherein R is H or CH 3 ; R 1 is H, Cl, Br, SCH 3 or CH 3 ; n is O, 1 or 2; W is O or S; Q is a saturated 5- or 6-membered ring containing one heteroatom selected from O, S, or N, or an unsaturated 5- or 6-membered ring containing 1 to 3 heteroatoms selected from 0-1 S, 0-1 O or 0-3 N and when Q is an unsaturated 5- or 6-membered ring, it may optionally be substituted by one or more groups selected from C 1 -C 4 alkyl, halogen, C 3 -C 4 alkenyl C 1 -C 3 alkoxy, C 1 -C 3 alkylthio, C 3 -C 4 alkenylthio, C 1 -C 2 haloalkoxy or C 1 -C 2 haloalkylthio; A is ##STR93## X is CH 3 , OCH 3 , OCH 2 CH 3 , Cl, F, Br, I, OCF 2 H, CH 2 F, OCH 2 CH 2 F, OCH 2 CHF 2 , OCH 2 CF 3 or CF 3 ; Y is H, C 1 -C 2 alkyl, OCH 3 , OC 2 H 5 , CH 2 OCH 3 , NHCH 3 , N(OCH 3 )CH 3 , N(CH 3 ) 2 , CF 3 , SCH 3 , OCH 2 CH═CH 2 , OCH 2 C.tbd.CH, CH 2 OCH 2 CH 3 , OCH 2 CH 2 OCH 3 , CH 2 SCH 3 , ##STR94## OCF 2 H, SCF 2 H or cyclopropyl; m is 2 or 3; L 1 and L 2 are independently O or S; R 2 is H or CH 3 ; R 3 and R 4 are independently C 1 -C 2 alkyl; and Z is CH; provided that (a) when X is Cl, F, Br or I, then Y is OCH 3 , OC 2 H 5 , N(OCH 3 )CH 3 , NHCH 3 , N(CH 3 ) 2 , or OCF 2 H; (b) when Y is cyclopropyl, X is other than Cl, F, Br or I; (c) when Q is a saturated 5- or 6-membered ring containing one nitrogen atom, it is bonded to the pyridine ring through carbon; (d) when W is S, then R is H, A is A-1, and Y is CH 3 , OCH 3 , OC 2 H 5 , CH 2 OCH 3 , C 2 H 5 , CF 3 , SCH 3 , OCH 2 CH═CH 2 , OCH 2 C.tbd.CH, OCH 2 CH 2 OCH 3 , CH(OCH 3 ) 2 or ##STR95## and their agriculturally suitable salts.