申请人:F. HOFFMANN-LA ROCHE & CO.
Aktiengesellschaft
公开号:EP0091565A1
公开(公告)日:1983-10-19
There is described a novel process for the maufacture of bicyclic diketones of the general formula
wherein R' is lower alkyl or aryl-lower alkyl, starting from compounds of the general formulae
wherein R' is as described above, one of R2 and R3 is methyl and the other is lower alkoxy and R4 is lower alkyl, and a novel process for the manufacture of compounds of formula II, wherein R2 is methyl, starting from 3- acetylpyridine. The compounds of formula I are useful as intermediates in the manufacture of 4,4a,5,6,7,8,8a,9- octahydro-4a,8a-trans-1H-pyrrolo[2,3-g)isoquinolin-4-ones having antipsychotic properties.
本发明描述了一种从通式化合物(其中R'如上所述,R2和R3中的一个为甲基,另一个为低级烷氧基,R4为低级烷基)开始,制造通式为R'为低级烷基或芳基-低级烷基的双环二酮的新工艺,以及一种从3-乙酰基吡啶开始,制造通式II化合物(其中R2为甲基)的新工艺。 式I化合物可用作制造具有抗精神病特性的4,4a,5,6,7,8,8a,9-八氢-4a,8a-反式-1H-吡咯并[2,3-g]异喹啉-4-酮的中间体。