CS134586A2 - Herbicide - Google Patents

Abstract

2-Imidazolinyl-substd. thieno- and furo-pyridine derivs. (Ia) and (Ib), their pyridine N-oxides (when W is O or S and A is COOR3), their optical isomers (when R1 and R2 are different), and acid addn salts (when R3 is other than a salt-forming cation) are new. (One of X' and X'' being a direct bond and the other X, and broken lines indicating optional bonds; R1=1-4C alkyl; R2=1-4C alkyl or 3-6C cycloalkyl; or R1+R2=opt. methyl-substd. 3-6C cycloalkyl; A=COOR3, CHO, CH2OH, COCH2OH, CONHCH2CH2OH, CONHOH or a gp. of the formula (Ic) R3=H; 1-12C alkyl opt interrupted and/or substd. halogen OH, 3-6C cycloalkyl, benzyloxy, furyl, phenyl, furfuryl, halophenyl, (lower alkyl)phenyl, (lower alkoxy)phenyl, niteophenyl, COOH, lower alkoxycarbonyl, or, 1-4C alkylthio or tri(lower alkyl) ammonio) 3-6C alkenyl opt. monosubstd. disubstd.; 3-6C cycloalkyl opt. mono- or disubstd.; 3-10C alkynyl opt. substd. or an alkali metal, Ca, Ba, Mn, Cu, Fe, ammonium or organic ammonium cation; RC, RD=H or CH3; B=H, COR4 or SO2R5, provided that when B is other than H and A is COOR3, then R3 is other than H or a salt -forming cation; R4=1-11C alkyl, chloromethyl, or phenyl opt. substd. by Cl, NO2, CH3 or OCH3; R5=1-5C alkyl, or phenyl opt. substd. by CH3, Cl or NO2; W=O or S; X=O, S or (when ---- is a single bond) SO; Y,Y',Z,Z'=H; halogen; 1-6C alkyl; 1-4C hydroxyalkyl; 1-6C alkoxy; 1-6C acyloxy; benzoyloxy opt. mono- or disubstd.; 1-4C alkylthio; phenoxy; 1-4C haloalkyl; 1-4C haloalkoxy; NO2;CN; 1-4C alkylamino; 1-4C dialkylamino-1-4C alkylsulphonyl; phenyl mono- or disubstd. by 1-4C alkyl, 1-4C alkoxy and/or halogen; Y and Z being identical when they represent H, halogen; alkyl or alkoxy; and Y and Y' and/or Z and Z' only identical when H or alkyl; or Y+Z = -(CH2)3, -(CH2)4-, or -CL=CM-CQ=CR7-; L, M, Q, R7=H, halogen, NO2, 1-4C alkyl, 1-4C alkoxy, phenyl or phenoxy, only one of L, M, Q and R7 other than H, halogen, 1-4C alkyl or 1-4C alkoxy).