申请人:University of Georgia Research Foundation, Inc.
公开号:US05442104A1
公开(公告)日:1995-08-15
The present invention provides inhibitors of kynureninase having the formula ##STR1## where X is CHOH, S, SO.sub.2, SO, SONH.sub.2, PO.sub.2 H or PONH.sub.2, R.sub.a and R.sub.b, independently of one another are H, a halogen, CF.sub.3 or a small alkyl group having one to three carbon atoms; R.sub.1 is H, NH.sub.2, NR.sub.6 RT, NO.sub.2, halogen, CF.sub.3 or a small alkyl group having from one to three carbon atoms, wherein: R.sub.6 and R.sub.7, independently of one another, are H, a formyl group or a small alkyl group having from one to three carbon atoms with the exception that only one of R.sub.6 or R.sub.7 can be a formyl group; R.sub.2 is OH, H, halogen, CF.sub.3 or a small alkyl group having from one to three carbon atoms; and R.sub.3, R.sub.4 and R.sub.5, independently of one another, are H, halogen, CF.sub.3, NO.sub.2, NH.sub.2, or small alkyl group having from one to three carbon atoms. In particular, compounds of this formula in which X is CHOH, S or SO.sub.2 are provided. In compounds of this formula in which X is CHOH, those having the (.alpha.S,.gamma.S) configuration or the (.alpha.R,.gamma.R) configuration when R.sub.A or R.sub.B is a hydrogen, are more potent inhibitors of kynureninase. Inhibitors of mammalian kynureninase are of particular use in therapy for certain neurological disorders.
本发明提供了具有以下式子的酪氨酸酶抑制剂:##STR1## 其中X是CHOH、S、SO.sub.2、SO、SONH.sub.2、PO.sub.2 H或PONH.sub.2,R.sub.a和R.sub.b分别独立地为H、卤素、CF.sub.3或具有一到三个碳原子的小烷基;R.sub.1为H、NH.sub.2、NR.sub.6 RT、NO.sub.2、卤素、CF.sub.3或具有一到三个碳原子的小烷基,其中:R.sub.6和R.sub.7分别独立地为H、甲酰基或具有一到三个碳原子的小烷基,但仅有R.sub.6或R.sub.7可以是甲酰基;R.sub.2为OH、H、卤素、CF.sub.3或具有一到三个碳原子的小烷基;而R.sub.3、R.sub.4和R.sub.5分别独立地为H、卤素、CF.sub.3、NO.sub.2、NH.sub.2或具有一到三个碳原子的小烷基。特别是,提供了X为CHOH、S或SO.sub.2的化合物。在X为CHOH的化合物中,当R.sub.A或R.sub.B为氢时,具有(.alpha.S,.gamma.S)构型或(.alpha.R,.gamma.R)构型的化合物是更有效的酪氨酸酶抑制剂。哺乳动物酪氨酸酶的抑制剂特别适用于治疗某些神经系统疾病。