Improved Manufacturing Route and Polymorphic Control of a Potent and Selective Anaplastic Lymphoma Kinase (ALK) Inhibitor ASP3026
作者:Yuji Takahama、Kazuyoshi Obitsu、Kazuhiro Takeguchi、Shun Hirasawa、Koji Kobayashi、Takahiro Akiba、Norihiro Ueda、Ryoki Orii、Atsushi Ohigashi、Takumi Takahashi、Minoru Okada、Shigeru Ieda
DOI:10.1021/acs.oprd.8b00427
日期:2019.4.19
described. A cost-effective and practical synthesis of 1 was accomplished as a result of the change of starting material from 2,4-dichloro-1,3,5-triazine (6) to cyanuric chloride (9) and late-stage introduction of a highly reactive N-methyl piperazine moiety by reductive amination of intermediate ketone 13. The modified process avoided the challenges with the original synthesis and furnished the several
描述了我们为改进间变性淋巴瘤激酶(ALK)抑制剂ASP3026(1)所做出的努力。由于起始原料从2,4-二氯-1,3,5-三嗪(6)变为氰尿酰氯(9)的后期转化,从而实现了1的经济高效且实用的合成。中间体酮13的还原胺化反应生成高反应性的N-甲基哌嗪部分。经过改进的工艺避免了原始合成方法带来的挑战,并为数百公斤的高质量API提供了高经济效率,可操作性和可重复性。此外,还讨论了第二代合成途径中多晶型控制的研究顺序,以获得热力学上期望的,最稳定的多晶型形式A04。