6-(3- And/or 5-halophenyl)pyridazines having an N-substituted carbamoyloxy, carbamoylthio, thiocarbamoyloxy or thiocarbamoylthio group at the 3- position on they pyridazine system and 6-(3- and/or 5-halophenyl)-3-pyridazone derivatives having a substituted or unsubstituted hydrocarbyloxycarbonyl substituent at the 2-position of the pyridazine ring have good fungicidal activity, making them useful as agricultural fungicides suitable for application to seeds, plants and agricultural land, and can be prepared by reacting the corresponding 6-substituted pyridazone or pyridazinethione with the corresponding carbamoyl halide or halocarbonate.
6-(3-和/或5-卤苯基)
吡啶嗪在其
吡啶嗪系统的3-位置具有N-取代的
氨甲酰氧基、
氨甲酰
硫基、
硫代
氨甲酰氧基或
硫代
氨甲酰
硫基,以及在
吡啶嗪环的2-位置具有取代或未取代的烃氧羰基取代基的6-(3-和/或5-卤苯基)-3-
吡啶酮衍
生物具有良好的杀真菌活性,使其可用作适用于种子、植物和农田的农业杀菌剂,并可通过将相应的6-取代
吡啶酮或
吡啶硫酮与相应的
氨甲
酰卤或卤代
碳酸酯反应制备。