| 摘要 |
The title compds. (I; R=C1-4 alkyl, C3-4 alkenyl, C3-4 alkynyl; X=O, S), useful as selective herbicides, were prepd. Thus, 39.4g N-(2-propynyl)-aniline in 75mL ethyl acetate was treated with 68.7g chloroformate (3-methoxycarbonyl aminophenyl)ester in 150mL ethyl acetate and 41.4g K2Co3 in 150mL H2O at 10≦̸C for 30 min to give 67.9g N-(2-propynyl)-carbanilic acid (3-methoxycarbonyl-aminophenyl) ester.
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