PURPOSE: To obtain new benzimidazole sulfonate derivatives useful as effective components to control or prevent attack on plants by plant pathogenic microorganisms, especially bacteria.
CONSTITUTION: The compound of formula I [Group R4SO2 exists at 1 or 3-position; R1 is unsaturated 5-membered heterocyclic with 2 or more N and/or S, or unsaturated 6-membered heterocyclic with 2 or less N; X is O or S; R2 is a halogen, (halo)alkyl, (halo)alkoxy or NO2; R3 is CN, CS-NH2, C(SR')=NH (R' is alkyl, haloalkyl or benzyl); R4 is an alkyl, cycloalkyl, NR"R"'(R" and R"' are each alkyl); (n) is 0-2], for example, 1-(dimethylaminosulfonyl)-2-cyano-4- bromo-6-(3,5-dichloropyridin-2-yloxy) benzimidazole, is obtained by reacting a compound of formula II (M is H or an alkali metal) with a compound of formula III (Q is a halogen or O-SO2R4) in an inactive solvent at a temperature of -30-180°C.
Barnhard Hostedtler
Marius sutter
Urs Muller
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