申请人:SUZHOU MIRACPHARMA TECHNOLOGY CO., LTD.
公开号:US20180093950A1
公开(公告)日:2018-04-05
Disclosed are an intermediate N-cyclopentyl-2-methoxy-5-(N,N-dimethyl-formamido)-3-pyrrylformonitrile (II) for preparing ribociclib and a preparation method therefor. The preparation method comprises the following preparation steps: carrying out halogenating reaction on N,N-dimethyl-2-carbonyl-propanamide (IV) to obtain N,N-dimethyl-1-halo-2-carbonyl-propanamide (V); carrying out substitution reaction on the intermediate (V) and malononitrile to prepare N,N-dimethyl-1,1-dicyano-3-carbonyl-butyramide (VI); carrying out cyclization reaction on the intermediate (VI) to prepare 2-methoxy-5-(N,N-dimethyl-formamido)-3-pyrrylformonitrile (VII); and carrying out coupling reaction on the intermediate (VII) and bromocyclopentane to obtain the intermediate N-cyclopentyl-2-methoxy-5-(N,N-dimethyl-formanido)-3-pyrrylformonitrile (II) for preparing ribociclib. The intermediate (II) and N-[5-(1-piperazino)-2-piperidyl]guanidine (III) are subjected to condensation reaction to prepare ribociclib. The preparation method has the advantages of accessible raw materials, simple process, high economy and environmental friendliness, and is suitable for industrial production.
本发明公开了一种用于制备利博齐亚的中间体N-环戊基-2-甲氧基-5-(N,N-二甲基甲酰胺基)-3-吡啶甲腈(II)及其制备方法。该制备方法包括以下制备步骤:对N,N-二甲基-2-羰基丙酰胺(IV)进行卤代反应,得到N,N-二甲基-1-卤代-2-羰基丙酰胺(V);对中间体(V)和马隆诺腈进行取代反应,制备N,N-二甲基-1,1-二氰基-3-羰基丁酰胺(VI);对中间体(VI)进行环化反应,制备2-甲氧基-5-(N,N-二甲基甲酰胺基)-3-吡啶甲腈(VII);对中间体(VII)和溴环戊烷进行偶联反应,得到用于制备利博齐亚的中间体N-环戊基-2-甲氧基-5-(N,N-二甲基甲酰胺基)-3-吡啶甲腈(II)。中间体(II)和N-[5-(1-哌嗪基)-2-哌啶基]脲(III)经过缩合反应制备利博齐亚。该制备方法具有原料易得、工艺简单、经济性高、环保友好等优点,适用于工业生产。