| 摘要 |
The oxazolinon type derivative represented by the following general formula(I) and its preparing method is disclosed with uses as herbicides wherein, R is low alkyl or halogen, low alkyl or trifluoromethyl containing phenyl, X is the same or different, halogen, carbomethoxy, nitro, or halogen, trifluoro substituted phenoxy, A is nitrogen, carbon, n is an integer of 1-3. The oxazolinon type derivative is prepared by a condensation reaction of M-amino acid of the general formula(II) and an acid chloride of the general formula(III) to produce an amino substituted M-amino acid of the general formula(IV), and then dehydration reaction after subjecting to reacting with anhydride nitric acid. The herbicide according to this invention has excellent herbicidal effectiveness in treatment of pre- or postemergency against a dicotyledonous plant.
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