申请人:Siegfried (Nantong) Pharmaceuticals Co. Ltd.
公开号:US10738058B2
公开(公告)日:2020-08-11
The present invention discloses a method of manufacturing 4-chloro-7H-pyrrolo[2,3-d]pyrimidine comprising the steps: a) Preparing ethyl 2-cyano-4,4-dimethoxybutanoate by coupling ethyl 2-cyanoacetate and 2-bromo-1,1-dimethoxyethane; b) Preparing 6-amino-5-(2,2-dimethoxyethyl)pyrimidin-4-ol by adding formamidine to ethyl 2-cyano-4,4-dimethoxybutanoate; c) Converting 6-amino-5-(2,2-dimethoxyethyl)pyrimidin-4-ol to 7H-pyrrolo[2,3-d]pyrimidin-4-ol; and d) Converting the 7H-pyrrolo[2,3-d]pyrimidin-4-ol to 4-chloro-7H-pyrrolo[2,3-d]pyrimidine. The method offers increased yield, less by-products and a decrease in waste compared to methods known as being state of the art.
本发明公开了一种制造 4-氯-7H-吡咯并[2,3-d]嘧啶的方法,包括以下步骤:a) 将 2-氰基乙酸乙酯和 2-溴-1,1-二甲氧基乙烷偶联,制备 2-氰基-4,4-二甲氧基丁酸乙酯; b) 向 2-氰基-4,4-二甲氧基丁酸乙酯中加入甲脒,制备 6-氨基-5-(2,2-二甲氧基乙基)嘧啶-4-醇;c) 将 6-氨基-5-(2,2-二甲氧基乙基)嘧啶-4-醇转化为 7H-吡咯并[2,3-d]嘧啶-4-醇;以及 d) 将 7H-吡咯并[2,3-d]嘧啶-4-醇转化为 4-氯-7H-吡咯并[2,3-d]嘧啶。与目前已知的方法相比,该方法产量更高、副产品更少、废物更少。