Pyrazolone compound or salt thereof, preparation method therefor, herbicide composition and use thereof
申请人:QINGDAO KINGAGROOT CHEMICAL COMPOUNDS CO., LTD.
公开号:US11076594B2
公开(公告)日:2021-08-03
The present invention belongs to the field of pesticides, particularly relates to a pyrazolone compound or a salt thereof, a preparation method therefor, a herbicidal composition and use thereof. The pyrazolone compound is as described in formula I:
In the formula, R1R2N represents substituted or unsubstituted 3-8 membered nitrogen-containing heterocyclic group containing 1-3 heteroatoms; or R1 and R2 each represent hydrogen or C1-8 alkyl; R3 represents hydrogen, C1-4 alkyl, alkenyl, alkynyl, unsubstituted C3-6 cycloalkyl or C3-6 cycloalkyl substituted by C1-4 alkyl; R4 represents methyl, ethyl, n-propyl, isopropyl or cyclopropyl; X represents hydrogen, —S(O)nR6, —R7 or substituted or unsubstituted 3-8 membered heterocyclic group containing 1-4 heteroatoms, wherein, n represents 1, 2 or 3, R6 represents substituted or unsubstituted alkyl or aryl, and R7 represents substituted or unsubstituted alkyl, aryl, alkyl acyl or aroyl. The active substance of the invention exhibits good herbicidal effect, and is convenient to use, low in cost and has great commercial value.
本发明属于农药领域,尤其涉及一种吡唑酮化合物或其盐类、其制备方法、除草组合物及其用途。吡唑酮化合物如式 I 所述:
式中,R1R2N代表取代或未取代的含有1-3个杂原子的3-8员含氮杂环基团;或R1和R2各自代表氢或C1-8烷基;R3代表氢、C1-4烷基、烯基、炔基、未取代的C3-6环烷基或被C1-4烷基取代的C3-6环烷基;R4 代表甲基、乙基、正丙基、异丙基或环丙基; X 代表氢、-S(O)nR6、-R7 或取代或未取代的含有 1-4 个杂原子的 3-8 位杂环基团,其中,n 代表 1、2 或 3,R6 代表取代或未取代的烷基或芳基,R7 代表取代或未取代的烷基、芳基、烷酰基或芳基。本发明的活性物质除草效果好,使用方便,成本低,具有很大的商业价值。