THIOCARBOXYLIC ACID DERIVATIVES, THEIR PREPARATION AND INTERMEDIATES FOR THEIR PREPARATION

摘要

- 46 - O.Z. 0050/42974 Thiocarboxylic acid derivatives useful as herbicides or plant growth regulators are of the general formula I I where R1 is unsubstituted or substituted alkyl, unsubstituted or substituted cycloalkyl or cycloalkenyl, unsubstituted or substituted alkenyl or alkynyl or unsubstituted or substituted phenyl; R2 is halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or alkylthio; X is nitrogen or CR6, where R6 is hydrogen or, together with R3, forms a C3- or C4-alkylene chain or C3- or C4alkenylene chain in which a methylene group is replaced with oxygen; R3 is halogen, alkyl, haloalkyl, alkoxy, haloalkoxy or alkylthio or R3 is bonded to R6 as stated above to give a 5-membered or 6-membered ring; R4 is unsubstituted or substituted alkyl, unsubstituted or substituted alkenyl or alkynyl, an unsubstituted or substituted 5-membered or 6-membered heteroaromatic structure containing from one to three nitrogen atoms and/or one sulfur or oxygen atom, or unsubstituted or substituted phenyl or naphthyl; R4 and R5 together with the adjacent carbon atom form a 3membered to 6-membered ring which may contain an oxygen or sulfur atom and may be substituted; R5 is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, or alkylthio; and Y and Z are each oxygen or sulfur.