EP0930305A1 — 1,2,3-thiadiazole derivatives and salts thereof, disease controlling agents for agricultural and horticultural use, and method for the use thereof

USPTO Abstract

A 1,2,3-thiadiazole derivative represented by general formula (I) or a salt thereof: wherein R 1 is H, (halo) C 1 -C 4 alkyl, 5- or 6-membered heterocycle containing 1 to 3 same or different O, N or S or the like, A is a group of the following formulas: wherein R 2 and R 3 are H, halogen, cyano, formyl, alkylthio, alkoxycarbonyl, substituted or unsubstituted phenyl, or the like, or R 2 and R 3 , taken conjointly, may form a 3- to 7-membered ring including a C 2 -C 6 alkylene group which may be intercepted by -O-, -S(O) n - (n is 0-2), -CO- or -NR 8 - (R 8 is H, halogen or the like), B is cyano or an unsubstituted or substituted 5- or 6-membered heterocycle containing 1-3 hetero atoms selected from O, N and S, and m is 0-4; salts thereof; an agrohorticultural disease controller containing said derivative or salt; and method for using said disease controller.