[EN] PYRIDO[4,3-B]PYRAZINE-2-CARBOXAMIDES AS NEUROGENIC AGENTS FOR THE TREATMENT OF NEURODEGENERATIVE DISORDERS<br/>[FR] PYRIDO[4,3-B]PYRAZINE-2-CARBOXAMIDES UTILISÉES EN TANT QU'AGENTS NEUROGÈNES DANS LE TRAITEMENT DES TROUBLES NEURODÉGÉNÉRATIFS
申请人:HOFFMANN LA ROCHE
公开号:WO2015071178A1
公开(公告)日:2015-05-21
The present invention relates to compounds of general formula (I), wherein R1 is hydrogen; R2 is hydrogen, lower alkyl, benzyl, lower alkyl substituted by hydroxy or is cycloalkyl optionally substituted by cyano; or R1 and R2 form together with the N-atom to which they are attached a heterocycloalkyl group, optionally containing an additional N, O or S ring atom, and which is optionally substituted by hydroxy; R3 is halogen, phenyl optionally substituted by one or more halogen, cyano, lower alkyl substituted by halogen, lower alkoxy substituted by halogen or by lower alkyl substituted by hydroxy, or is heteroaryl, optionally substituted by lower alkyl or halogen, or is 3,6-dihydro-pyran-4-yl, or is piperidin-1-yl optionally substituted by one or more halogen; or to a pharmaceutically acceptable acid addition salt, to a racemic mixture or to it corresponding enantiomer and/or optical isomer thereof. The compounds of formula I may be used in the treatment of schizophrenia, obsessive-compulsive personality disorder, depression, bipolar disorders, anxiety disorders, normal aging, epilepsy, retinal degeneration, traumatic brain injury, spinal cord injury, post-traumatic stress disorder, panic disorder, Parkinson's disease, dementia, Alzheimer's disease, cognitive impairment, chemotherapy-induced cognitive dysfunction, Down syndrome, autism spectrum disorders, hearing loss, tinnitus, spinocerebellar ataxia, amyotrophic lateral sclerosis, multiple sclerosis, Huntington's disease, stroke, radiation therapy, chronic stress, abuse of neuro-active drugs, selected from alcohol, opiates, methamphetamine, phencyclidine and cocaine.
本发明涉及一般式(I)的化合物,其中R1为氢;R2为氢、较低的烷基、苄基、被羟基取代的较低烷基或是环烷基,可选择地被氰基取代;或者R1和R2与它们连接的N原子一起形成一个杂环烷基基团,可选择地含有额外的N、O或S环原子,并且可选择地被羟基取代;R3为卤素、苯基,可选择地被一个或多个卤素、氰基、被卤素取代的较低烷基、被卤素取代的较低烷氧基或被羟基取代的较低烷基取代,或者是杂芳基,可选择地被较低烷基或卤素取代,或者是3,6-二氢-吡喃-4-基,或者是哌啶-1-基,可选择地被一个或多个卤素取代;或者是药学上可接受的酸加合物,或者是外消旋混合物,或者是其对应的对映体和/或光学异构体。式(I)的化合物可用于治疗精神分裂症、强迫性人格障碍、抑郁症、躁郁症、焦虑症、正常衰老、癫痫、视网膜退化、创伤性脑损伤、脊髓损伤、创伤后应激障碍、恐慌障碍、帕金森病、痴呆症、阿尔茨海默病、认知障碍、化疗引起的认知功能障碍、唐氏综合征、自闭症谱系障碍、听力丧失、耳鸣、脊髓小脑共济失调、肌萎缩侧索硬化、多发性硬化症、亨廷顿病、中风、放射治疗、慢性压力、神经活性药物滥用,从酒精、阿片类药物、甲基苯丙胺、芬太尼和可卡因中选择。