| 摘要 |
5H-1,3,4-Thiadiazolo(3,2-a)pyrimidine-5-one derivatives of formula (I) are prepd. In the formula, X is hydrogen, halogen, methyl, ethyl, methoxy, ethoxy, phenyl, phenoxy, cyano or nitro; Y is hydrogen, halogen, haloalky, chloroalkyl, alkoxy, alkynyl or cyano opt. substd. by phenyl, or C2-3 alkynyl opt. substd. by phenyl or chloroalky. Cpds. are useful as agricultural and horticultural herbicides.
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