申请人:SUZHOU MIRACPHARMA TECHNOLOGY CO., LTD.
公开号:US20170247380A1
公开(公告)日:2017-08-31
This invention reveals the method for preparing Palbociclib (I). The preparation includes: produce the 6-acetyl-5-methyl-2-substituent-pyrido[2,3-d]pyrimidin-7(8H)-one (IV) through the ring-closure reaction by using accessible raw materials of 1-(4-amino-2-substituent-5-pyrimidinyl) ethanone (II) and acetylacetic ester (III); produce the 6-acetyl-8-cyclopentyl-5-methyl-2-substituent-pyrido[2,3-d]pyrimidin-7(8H)-one (VI) through the substitution reaction between the intermediate (IV) and the cyclopentane halide (V); prepare the Palbociclib (I) through the condensation and hydrolysis reactions between the intermediate (VI) and 4-(6-amino-3-pyridinyl)-1-piperazinecarboxylic acid 1,1-dimethylethyl ester (VII). This method for preparing Palbociclib (I) is characterized by easily available raw materials, concise process and economy and environmental protection, and it is suitable for industrialized production.
本发明揭示了制备Palbociclib(I)的方法。该方法包括:使用可得到的原料1-(4-氨基-2-取代-5-嘧啶基)乙酮(II)和乙酰乙酸酯(III),通过环合反应产生6-乙酰基-5-甲基-2-取代基-吡啶[2,3-d]嘧啶-7(8H)-酮(IV); 通过中间体(IV)和环戊烷卤代物(V)之间的取代反应产生6-乙酰基-8-环戊基-5-甲基-2-取代基-吡啶[2,3-d]嘧啶-7(8H)-酮(VI); 通过中间体(VI)和4-(6-氨基-3-吡啶基)-1-哌嗪羧酸1,1-二甲基乙酯(VII)之间的缩合和水解反应制备Palbociclib(I)。该制备Palbociclib(I)的方法具有原料易得、工艺简洁、经济环保等特点,适合工业化生产。