The present invention relates to compounds of formula I
wherein
R
1
, R
2
, R
3
, X, X
1
, and n are as defined in the specification and pharmaceutically acceptable acid addition salts thereof. These compounds are good inhibitors of the glycine transporter 1 (GlyT-1) for the treatment CNS disorders, such as schizophrenia, cognitive impairment, and Alzheimer's disease.
本发明涉及一种式子为I的化合物,其中R1,R2,R3,X,X1和n如规范中定义的那样,以及其药学上可接受的酸盐。这些化合物是甘
氨酸转运体1(GlyT-1)的良好
抑制剂,用于治疗中枢神经系统疾病,如精神分裂症,认知障碍和阿尔茨海默病。