| 摘要 |
NEW MATERIAL:The compound of formula I {X is -D-E-[D is group of formula II (a is 0 or 1); E is O, S, etc.]; r<1>-r<4> are H, OH, halogen or (substituted) 1-12C hydrocarbon group; -Y- is O, S, etc.; R<1> is halogen; m is 0-5; R is nitro, cyano or -G-R<2> [G is S, O, -SO-, etc.; R<2> is H or group of formula III (r<11> is 1-8C hydrocarbon group)]; n is 0-5} or its inorganic or organic acid salt. EXAMPLE:3-{(4-Chloro-2-fluoro-5-(1-ethoxycarbonylethoxy)phenylimino)}- 5,6-dihy dro-6-methyl-3H-oxazolo[2,3-C][1,2,4]thiadiazole. USE:A selective herbicide. PREPARATION:The compound of formula IV is made to react with the com pound of formula V (Hal and R<1> are halogen).
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