[NH2:1][C:2]1[CH:6]=[C:5]([C:7]([CH3:10])([CH3:9])[CH3:8])[O:4][N:3]=1.[CH3:11][O:12][N:13]([CH3:17])[C:14](Cl)=[O:15]>>[CH3:11][O:12][N:13]([CH3:17])[C:14]([NH:1][C:2]1[CH:6]=[C:5]([C:7]([CH3:10])([CH3:9])[CH3:8])[O:4][N:3]=1)=[O:15]Using 3-amino-5-t-butylisoxazole and N-methoxy-N-methylcarbamoyl chloride, the reaction is run as in Example 1, whereby 1-methoxy-1-methyl-3-(5-t-butyl-3-isoxazolyl)urea is obtained. Yield is 94.7%. Melting point is 106.0° to 107.0° C.
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