Using a Johnson‐Claisen Rearrangement Strategy to Construct Azaindoles – A Streamlined and Concise Route for the Commercial Process of Fevipiprant
作者:Christian Mathes、Bernard Riss、Ueli Rüegger、Lukas Hueber、Darija Dedic、Zhongbo Fei、Carolien Reijer、Kurt Königsberger、Matthias Napp、Thierry Schlama、Glen Dempsey、Philipp Lustenberger
DOI:10.1002/ejoc.202100686
日期:2021.8.20
novel and concise synthesis of the DP2 receptor antagonist Fevipiprant (NVP-QAW039) was developed. The key step – a Johnson Claisen reaction followed by an intramolecular hydroamination of the formed reactive allene moiety allowed to build the 7-aza-indole framework, while overcoming the low selectivity and low yield of the initial research route, and give access to a commercially viable process with a
开发了 DP2 受体拮抗剂 Fevipiprant (NVP-QAW039) 的新颖简洁的合成方法。关键步骤——Johnson Claisen 反应,然后对形成的反应性丙二烯部分进行分子内加氢胺化,从而构建 7-氮杂-吲哚骨架,同时克服了最初研究路线的低选择性和低产率,并提供了商业途径生态足迹减少的可行过程。