NOVEL 1,2-BENZISOXAZOLE DERIVATIVE OR SALT THEREOF, AND BRAIN PROTECTIVE AGENT COMPRISING THE SAME
申请人:TOYAMA CHEMICAL CO., LTD.
公开号:EP0665226A1
公开(公告)日:1995-08-02
A 1,2-benzisoxazole derivative represented by general formula (I) and a salt thereof, said compound (I) being excellent in the protection against cerebral hypoxia, having the macrobiotic effect on the animals suffering from cerebral ischemia and an antispasmodic effect, having reduced effect on the central nervous system, and having a high safety, thus being useful for treating not only the acute stage of cerebral circulation disorder but also the chronic stage thereof, sequelae of the trauma of the head and epilepsy. In formula (I), R represents hydrogen, halogen, nitro, cyano, hydroxy, optionally substituted lower alkyl, lower alkenyl, lower alkynyl, aralkyl, aryl, lower alkyloxy, cycloalkyl, aralkyloxy, aryloxy, amino, lower acyl, arylcarbonyl, lower alkanesulfonyl, arenesulfonyl, lower alkylthio, carbamoyl, heterocycle, lower alkylene or lower alkenylene; R₁ and R₂, which may be the same or different from each other, represent each hydrogen or optionally substituted lower alkyl; R₃ represents hydrogen, optionally substituted lower alkyl, aryl, aralkyl or heterocycle; R₄ represents optionally substituted lower alkyl, aryl or heterocycle, or alternatively R₃ and R₄ may be combined together to represent lower alkylene; and R₅ and R₆, which may be the same or different from each other, represent each hydrogen, optionally substituted lower alkyl, lower alkenyl, lower alkynyl, lower acyl, lower alkyloxycarbonyl or aralkyl.
一种通式(I)代表的1,2-苯并异噁唑衍生物及其盐,所述化合物(I)具有优异的抗脑缺氧保护作用,对脑缺血动物具有大生物效应和解痉作用,对中枢神经系统的影响较小,安全性高,因此不仅可用于治疗急性期脑循环障碍,还可用于治疗慢性期脑循环障碍、头部外伤后遗症和癫痫。在式 (I) 中,R 代表氢、卤素、硝基、氰基、羟基、任选取代的低级烷基、低级烯基、低级炔基、芳烷基、芳基、低级烷氧基、环烷基、芳烷氧基、芳氧基、氨基、低级酰基、芳羰基、低级烷磺酰基、壬磺酰基、低级烷硫基、氨基甲酰基、杂环、低级亚烷基或低级亚烯基;R₁ 和 R₂(可以相同或不同)分别代表氢或任选取代的低级烷基;R₃ 代表氢、任选取代的低级烷基、芳基、芳烷基或杂环;R₄ 代表任选取代的低级烷基、芳基或杂环,或者 R₃ 和 R₄ 可以组合在一起代表低级亚烷基;R₅和 R₆可以相同或不同,分别代表氢、任选取代的低级烷基、低级烯基、低级炔基、低级酰基、低级烷氧基羰基或芳烷基。