申请人:Hoffmann-la Roche Inc.
公开号:US06281353B1
公开(公告)日:2001-08-28
The present invention relates to a process for manufacturing diazepine derivatives of the general formula I
wherein R1 is lower alkyl and R2 is hydrogen, or R1 and R2 are together —(CH2)n— and n is 2 or 3; R3 is halogen, lower alkyl, lower alkoxy and m is 0, 1 or 2; R4 is hydrogen or lower alkyl.
The compounds of general formula I are valuable intermediate products for the manufacture of imidazo [1,5-a][1,4]diazepine derivatives, like for instance 7-chloro-3-(5-dimethylaminomethyl-[1,2,4]oxadiazol-3-yl)-5-methyl-4,5-dihydro-imidazo[1,5-a][1,4]benzodiazepin-6-one, which diazepine derivatives show excellent psychopharmacological properties as agonists of the central benzodiazepine receptors.
本发明涉及一种制造通式I的二氮平衍生物的方法,其中R1是低碳基且R2是氢,或者R1和R2在一起是—(CH2)n—,n为2或3;R3是卤素、低碳基、低烷氧基,m为0、1或2;R4是氢或低碳基。通式I的化合物是制造咪唑[1,5-a][1,4]二氮平衍生物的有价值中间体产品,例如7-氯-3-(5-二甲氨基甲基-[1,2,4]噁唑-3-基)-5-甲基-4,5-二氢-咪唑[1,5-a][1,4]苯并二氮平-6-酮,这些二氮平衍生物显示出卓越的精神药理学特性,作为中枢苯二氮平受体的激动剂。