申请人:Bayer Aktiengesellschaft
公开号:US04053598A1
公开(公告)日:1977-10-11
2,4-Dioxo-1,2,3,4-tetrahydro-s-triazino-[1,2-a]-benzimidazoles of the formula ##STR1## are produced by reacting a benzimidazole compound of the formula ##STR2## with a diphenyl carbonate of the formula ##STR3## wherein R.sup.1 is optionally substituted alkyl or aryl, alkenyl or dialkylamino, R.sup.2 is hydrogen, alkyl or trifluoromethyl, R.sup.3 is any of the R.sup.1 radicals or hydroxycarbonylalkyl, and R.sup.4 is hydrogen, alkyl or halogen. The reaction can be effected employing the benzimidazole in impure form, without isolation, in the vessel in which it is formed. Those compounds wherein R.sup.1 is a variously .omega.-substituted alkyl radical and R.sup.2 is hydrogen or methyl are new and all the compounds exhibit fungicidal activity.
公式为 ##STR1## 的2,4-二氧代-1,2,3,4-四氢-s-三氮唑-[1,2-a]-苯并咪唑可通过将公式为 ##STR2## 的苯并咪唑化合物与公式为 ##STR3## 的二苯基碳酸酯反应制得,其中R.sup.1是可选的取代基的烷基或芳基,烯基或二烷基氨基,R.sup.2是氢,烷基或三氟甲基,R.sup.3是任何R.sup.1基团或羟基羰基烷基,R.sup.4是氢,烷基或卤素。该反应可以在容器中使用未纯化的苯并咪唑进行,无需分离。其中R.sup.1为各种ω-取代烷基基团,R.sup.2为氢或甲基的化合物是新的,所有化合物均表现出杀真菌活性。