申请人:SUZHOU MIRACPHARMA TECHNOLOGY CO., LTD.
公开号:US10005778B2
公开(公告)日:2018-06-26
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Palbociclib(I)的制备方法。该制备方法包括使用可获得的原料 1-(4-氨基-2-取代基-5-嘧啶基)乙酮 (II) 和乙酰乙酸酯 (III),通过环闭反应生产 6-乙酰基-5-甲基-2-取代基吡啶并[2,3-d]嘧啶-7(8H)-酮 (IV);通过中间体(IV)和环戊烷卤化物(V)之间的取代反应,制备 6-乙酰基-8-环戊基-5-甲基-2-取代基吡啶并[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)之间的缩合反应和水解反应制备帕博西尼(I)。这种制备帕博西来(I)的方法具有原料易得、工艺简便、经济环保等特点,适合工业化生产。