The invention relates to compounds of the formula
wherein X1 and X2 are halo;
R is lower alkyl of from 1 to 6 carbon atoms;
R' is hydrogen, lower alkyl of 1 to 4 carbon atoms, cycloalkyl of 3 to 6 carbon atoms, lowercycloalkylloweralkyl of 4 to 7 carbon atoms and phenyl;
R2 is hydrogen or lower alkyl of 1 to 6 carbon atoms, and carboxy lower alkyl of 2 to 6 carbon atoms; and the pharmaceutically acceptable salts thereof and a process for preparing the same. Those compounds are suitable for the treatment and prevention of injury to the gray matter of the brain and to the spinal chord due to accidents, ischemic stroke, cardiac arrest, arrested breathing, Reye's syndrome and hydrocephalus.
本发明涉及如下式的化合物
其中 X1 和 X2 为卤代;
R 是 1 至 6 个碳原子的低级烷基;
R'是氢、1 至 4 个碳原子的低级烷基、3 至 6 个碳原子的环烷基、4 至 7 个碳原子的低级环烷基和苯基;
R2 是氢或 1 至 6 个碳原子的低级烷基,以及 2 至 6 个碳原子的羧基低级烷基;及其药学上可接受的盐和制备方法。这些化合物适用于治疗和预防因意外事故、缺血性中风、心脏骤停、呼吸停止、雷氏综合征和脑积
水引起的大脑灰质和脊髓损伤。