申请人:Sankyo Company Limited
公开号:US04054663A1
公开(公告)日:1977-10-18
Pyridine derivatives having the formula ##STR1## wherein R.sub.1 is an alkyl group having 1 to 3 carbon atoms; R.sub.2 is hydrogen atom or an alkyl group having 1 to 3 carbon atoms; R.sub.3 is hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkenyl group having 3 or 4 carbon atoms, an alkyl group having 1 or 2 carbon atoms and hydroxy as a substituent, an alkanoyl group having 1 to 18 carbon atoms, an alkenoyl group having 3 to 11 carbon atoms, an aromatic acyl group having 6 or 10 carbon atoms in the aromatic ring and optionally alkyl, alkoxy, acetylamino, cyano or halogen as a substituent, a heterocyclic acyl group, an alkylcarbamoyl group having 1 to 4 carbon atoms in the alkyl moiety, an allylcarbamoyl group or hydroxy group; n is an integer of 0 to 2 inclusive; and, when n is 2, R.sub.1 's may be the same or different; provided that when R.sub.2 is said alkyl group having 1 to 3 carbon atoms, R.sub.3 is said alkyl group having 1 to 4 carbon atoms. They are highly effective in the treatment of coccidiosis.
吡啶衍生物具有以下公式:其中R.sub.1是具有1至3个碳原子的烷基基团;R.sub.2是氢原子或具有1至3个碳原子的烷基基团;R.sub.3是氢原子,具有1至4个碳原子的烷基基团,具有3或4个碳原子的烯基基团,具有1或2个碳原子并且羟基作为取代基的烷基基团,具有1至18个碳原子的烷酰基团,具有3至11个碳原子的烯酰基团,在芳环中具有6个或10个碳原子的芳基酰基团,并且可选择烷基,烷氧基,乙酰氨基,氰基或卤素作为取代基,杂环酰基,具有1至4个碳原子的烷基基团的烷基氨基甲酰基团,烯基氨基甲酰基团或羟基;n是0到2的整数,包括0和2;当n为2时,R.sub.1'可能相同也可能不同;但是当R.sub.2为具有1至3个碳原子的烷基基团时,R.sub.3为具有1至4个碳原子的烷基基团。它们在球虫病的治疗中非常有效。