| 摘要 |
An oxazolinone derivative compound, represented by the general formula I, shows superior herbicidal activity against, especially, dicotyledonous vegetables. It is effective upon applying both before and after the sprouting of vegetables. It is prepared by condensating an alpha -amino acid represented by the general formula II with an acid chloride represented by the general formula III, to give an acyl alpha -amino acid represented by the following formula IV: reacting the acyl alpha -amino acid with acetic anhydride; and dehydrating the resulting adduct: <IMAGE> (I) <IMAGE> (II) <IMAGE> (III) <IMAGE> (IV) wherein, R represents a lower alkyl group or a phenyl group containing halogen, lower alkyl or trifluoromethyl group; X represents halogen atom, carbomethoxy group, nitro group, or halogen or trifluoromethyl-substituted phenoxy group, being the same or different from one another; A represents nitrogen or carbon atom; and n is an integer of 1 to 3. |
