A compound of the formula
1
wherein R
1
is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R
2
is hydrogen or methyl; and R
3
is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
式中的化合物
1
其中 R
1
是具有 1 至 6 个
碳原子的直链或支链烷基、
苯基或具有 3 至 6 个
碳原子的
环烷基; R
2
是
氢或
甲基;以及 R
3
是
氢、
甲基或羧基;可用于治疗癫痫发作性疾病。公开了制备该化合物的工艺。还公开了在合成该化合物过程中制备的
中间体。