| 摘要 |
PH/5-18761/A Novel herbicides: Benzothiazolone derivatives of formula I (I) wherein Y is oxygen or sulfur; R1 is hydrogen or fluorine; and R2 is hydrogen, C1-C6alkyl, C2-C4alkenyl, or C2-C6alkynyl; halo-substituted C1-C6alkyl, C2-C4alkenyl, or C3-C6alkynyl; C1-C4alkoxy-C1-C4alkyl, C1-C4alkoxy-C1-C2alkoxy-C1-C2alkyl, 1-phenylpropen-3-yl, cyano- or C3-C6cycloalkyl-substituted C1-C6alkyl; carboxy-C1-C4alkyl, C1-C6alkoxycarbonyl-C1-C4alkyl, halo-C1-C6alkoxycarbonyl-C1-C4-alkyl, C1-C4alkoxy-C1-C2alkoxycarbonyl-C1-C4alkyl, C1-C6alkoxycarbonyl-C1-C2alkoxy-carbonyl-C1-C4alkyl, C3-C6cycloalkyl-C1-C2alkoxycarbonyl-C1-C4alkyl, C1-C5alkyl-aminocarbonyl-C1-C4alkyl, di-C1-C5alkylaminocarbonyl-C1-C4alkyl, C3-C6cycloalkyl, C1-C4alkylthio-C1-C4alkyl, benzyl, or halo-substituted benzyl, C1-C4alkylsulfonyl, C3-C6-alkenyloxy-C1-C4alkyl, C1-C8alkylcarbonyl, , , C1-C4alkylthiocarbonyl-C1-C4alkyl, or the group R3 is hydrogen or C1-C4alkyl; and R4 is hydrogen or C1-C4alkyl; have good pre- and post-emergence selective herbicidal properties.
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