2,5-DISUBSTITUTED 1,3,4-THIADIAZOLE DERIVATIVES,A PROCESS FOR THEIR PREPARATION AND THEIR USE IN AGENTS FOR COMBATING PESTS

摘要

2,5-Disubstituted 1,3,4-thiadiazole derivatives of the formula (I) …IMAGE… in which… R1 stands for alkyl or unsubstituted or substituted aralkyl and… R2 stands for aryl or aralkyl which are in each case unsubstituted or substituted or for an unsubstituted or substituted and/or optionally benzo-fused heterocycle - excluding the compound 2,5-bis-[(phenylmethyl)-sulphonyl]-1,3,4-thiadiazole,… and their use for controlling harmful organisms, particularly fungi. …??Formula (I) provides a general definition of the new 2,5-disubstituted 1,3,4-thiadiazole derivatives. The compounds can be prepared by analogous processes, for example from suitable 2,5-dimercapto-1,3,4-thiadiazole derivatives using suitable oxidising agents.