作者:Shun Hirasawa、Takashi Kikuchi、Souichirou Kawazoe
DOI:10.1021/acs.oprd.9b00269
日期:2019.11.15
ASP3627 (1) is a potent Janus kinase inhibitor discovered and developed by Astellas Pharma Inc. Here, we report the development of a practical and scalable method for manufacturing ASP3627 featuring a six-reaction telescoping process consisting of DIBAL reduction, hydrolysis, Wittig reaction, cyclization, and a two-step sequence to remove the SEM group. In addition, a simple palladium removal procedure
ASP3627(1)是由Astellas Pharma Inc.发现和开发的有效Janus激酶抑制剂。在这里,我们报告了一种实用且可扩展的ASP3627生产方法的开发,该方法具有六反应伸缩过程,包括DIBAL还原,水解,Wittig反应,环化,然后按两步顺序除去SEM组。另外,描述了使用1-半胱氨酸的简单的钯去除程序。该方法用于成功进行ASP3627的首次多千克合成,从而以优异的总收率生产了30公斤的高纯度产品。