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的二氮杂环衍生物的工艺,其中R1是较低的烷基,R2是氢,或者R1和R2一起为—(CH2)n—,n为2或3;R3是卤素、较低的烷基、较低的烷氧基,m为0、1或2;R4是氢或较低的烷基。通式I的化合物是制造咪唑并[1,5-a][1,4]二氮杂环衍生物的有价值的中间产物,例如7-氯-3-(5-二甲胺甲基-[1,2,4]噁唑-3-基)-5-甲基-4,5-二氢咪唑并[1,5-a][1,4]苯并二氮杂环-6-酮,这些二氮杂环衍生物显示出优异的心理药理学性能,作为中枢苯二氮卓类受体激动剂。