| 摘要 |
Fungicidal oxadithiadiazapentalenes of the formula <IMAGE> (I) wherein R and R' are independently hydroxy or lower alkyl; R1 is hydrogen or lower alkyl; R2 and R3 are each, independent of the other, hydrogen, halogen, alkenyl, hydroxy, hydroxyalkenyl, alkoxy, alkoxyalkyl, alkoxyalkenyl, alkylthio, or haloalkyl having from 1 to 3 carbon atoms and from 1 to 4 halogen atoms or R2 and R3 together are alkylidiene, alkoxyalkenyl or together with the carbon atom to which they are joined form a cycloalkyl group; and R4 and R5 are each independent of the other hydrogen, alkyl, alkoxy, halogen, haloalkyl, nitro, cyano, or dialkylamino. The compounds can be prepared by reacting sulfur chloride with the appropriate substituted N-cyanoalkylenecarboxyamide corresponding to the substituent desired at the 2-position of the compounds. The compounds are useful for controlling plant fungus; especially Grape Downy Mildew fungus and Tomato Late Blight fungus.
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