| 摘要 |
Disclosed are novel compounds of the formula <IMAGE> in which when R1 and R2 are taken separately, R1 is selected independently from the group consisting of hydrogen and C1-C7 alkyl and R2 is selected independently from the group consisting of C1-C7 alkyl, phenyl and 2-furanyl, and, when taken together with the carbon atom to which they are attached R1 and R2 form a C3-C8 cycloalkyl group; R3 is selected from the group consisting of C1-C7 alkyl, allyl, phenyl, 3-halophenyl and 3,4-dihalophenyl; and R4 is selected from the group consisting of C1-C7 alkyl, allyl, cyclohexyl, phenyl, halophenyl, tolyl, anisolyl, nitrophenyl, 3,4-dihalophenyl, 1-naphthyl, p-toluene sulfonyl, trihalomethylphenyl and 2,6-dinitro-4-trihalomethylphenyl. These compounds have herbicidal activity.
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