A 1,4-benzoxazine derivative represented by the following formula (1):
wherein R¹ represents an unsubstituted or halogen-substituted lower alkyl, unsubstituted or halogen-substituted lower alkylsulfonyl, nitro or cyano group, R² and R³ may be the same or different and individually represent a hydrogen atom or a lower alkyl group or are fused together with the adjacent carbon atom into a 3- to 6-membered carbon ring, R⁴ represents a hydrogen atom or an unsubstituted or substituted lower alkyl or acyl group, R⁵ represents a hydrogen atom or a unsubstituted or substituted lower alkyl, lower alkenyl, lower alkoxyl, aryl, aryloxyl or heterocyclic ring group, and Y represents an oxygen or sulfur atom, with the proviso that R¹ is other than a nitro or cyano group when R² and R³ are individually a methyl group, R⁴ is a hydrogen atom, R⁵ is a 3-chloropropyl group and Y is an oxygen atom; or a salt thereof.
下式(1)所代表的 1,4-苯并恶嗪衍
生物:
其中 R¹ 代表未取代或卤素取代的低级烷基、未取代或卤素取代的低级烷基磺酰基、硝基或
氰基,R² 和 R³ 可以相同或不同,且各自代表氢原子或低级烷基或与相邻碳原子融合成 3 至 6 元碳环,R⁴ 代表氢原子或未取代或取代的低级烷基或酰基、R⁵代表氢原子或未取代或取代的低级烷基、低级烯基、低级烷氧基、芳基、芳环基或杂环基团,Y 代表氧原子或
硫原子,但当 R² 和 R³ 单独为甲基、R⁴ 为氢原子、R⁵ 为 3-
氯丙基且 Y 为氧原子时,R¹ 不是硝基或
氰基;或其盐。