申请人:Sankyo Company, Limited
公开号:US04738961A1
公开(公告)日:1988-04-19
Compounds of formula (I): ##STR1## [in which: A represents a group of formula --CH.dbd.CH-- or --CH.sub.2 --CH.sub.2 --; R.sup.1 represents a halogen atom; R.sup.2 represents a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group or an alkoxy group; R.sup.3 represents a hydrogen atom or a halogen atom; and Y represents a hydroxy group, a halogen atom, an alkylamino group, a dialkylamino group, an alkenylamino group, a dialkenylamino group, an anilino group (in which the aromatic ring is unsubstituted or has one or two substituents selected from halogen atoms and alkyl groups), a cycloalkylamino group, a 1-pyrrolidinyl group, a piperidino group, a morpholino group, a group of formula ##STR2## (in which R.sup.4 represents an alkyl group or a phenyl group) or a group of formula ##STR3## (in which A, R.sup.1, R.sup.2 and R.sup.3 are as defined above)] are useful agricultural fungicides having greater systemic activity and chemical stability than known compounds of similar structure. They may be applied as such or in a conventional preparation to seeds and growing plants. They may be prepared by reacting a 6-(substituted phenyl)-3(2H)-pyridazinone with formaldehyde and optionally with a halogenating agent, an appropriate amine or piperazine.
化合物的公式(I):##STR1## [其中:A代表公式--CH.dbd.CH--或--CH.sub.2 --CH.sub.2 --的基团; R.sup.1代表卤素原子; R.sup.2代表氢原子、羟基、卤素原子、烷基或烷氧基; R.sup.3代表氢原子或卤素原子; Y代表羟基、卤素原子、烷基氨基、二烷基氨基、烯基氨基、二烯基氨基、苯胺基(其中芳香环未取代或有一或两个取代基,所选取代基为卤素原子和烷基),环烷基氨基、1-吡咯烷基、哌啶基、吗啉基、公式##STR2##(其中R.sup.4代表烷基或苯基)或公式##STR3##(其中A、R.sup.1、R.sup.2和R.sup.3如上所定义)]是有用的农业杀菌剂,比已知结构类似的化合物具有更大的系统活性和化学稳定性。它们可以作为如此或在传统制剂中应用于种子和生长的植物。它们可以通过将6-(取代苯基)-3(2H)-吡啶嗪酮与甲醛和可选地与卤化剂、适当的胺或哌嗪反应来制备。