An efficient and high-yielding protocol for the production of Regorafenib via a new synthetic strategy
作者:Li-Mei Wang、Bao-Quan Du、Da-Zhuang Zuo、Ming-Ke Cheng、Meng Zhao、Si-Jia Zhao、Xin Zhai、Ping Gong
DOI:10.1007/s11164-015-2206-z
日期:2016.4
An improved, high-yielding, and efficient protocol for the production of Regorafenib (1), a novel diaryl urea inhibitor of multiple protein kinases, is described. The highlight of the process chemistry design and development is an optimization of the route for preparing key intermediate 4-(4-amino-3-fluorophenoxy)-N-methylpicolinamide (7) by O-alkylation, nitration and reduction reactions. The developed process avoids using column chromatography to isolate 7, reduces the reaction requirements and is cost-saving, resulting in an increased overall yield from 35.0 to 57.0 % and purity from 97.0 to 99.8 %.
本文描述了一种改进的、高产且高效的生产瑞戈非尼(1)的协议,瑞戈非尼是一种新型二芳基脲类多蛋白激酶抑制剂。该工艺化学设计和开发的重点是通过O-烷基化、硝化和还原反应优化制备关键中间体4-(4-氨基-3-氟苯氧基)-N-甲基吡啶酰胺(7)的路线。开发出的工艺避免了使用柱色谱法来分离7,减少了反应要求并节约成本,从而使总产率从35.0%提高到57.0%,纯度从97.0%提升至99.8%。