| 摘要 |
3-Isoxazolyl urea derivs.(I, R =H, alkyl or aryl; R2,R3 = H, alkyl, alkenyl, alkinyl, aralkyl, aryl, alkoxy or alkylthio; X = H, alkyl or halogen), useful as herbicides or algicides, were prepd. by reaction of isoxyano-3-isoxazolyl ester(II, R is given) and amine(III, R2 and R3 are given). Thus, 1.15 g N-methylbutylamine was added to 1.99 g isocyano-5-t-butyl-3-isoxazolyl ester in 120ml benzene, and refluxed for 3 hr to give 2.73 g 1-butyl-l- methyl-3-(5-t-butyl- 3-isoxazolyl)urea.
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