| 摘要 |
A N,N-dimethyl-2-(aminosulfonyl)-3-pyridine-carboxamide of formula (I) and its agriculturally acceptable salt is prepd. In (I), J=a gp. of formula (II) or (III); R=H or Me; R1=H or C1-3 alkyl; R2=C1-3 alkyl or C1-2 alkoxy; R1 and R2 together form -(CH2)n-; n=2, 3 or 4; R3=H, Cl, Br, F or Me; X=Me, Cl, -CH2F or -OCH2CH3. (I) is useful as a herbicide which selectively kills harmful weeds in cornfield.
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