Synthesis, Optimization, and Large-Scale Preparation of the Low-Dose Central Nervous System-Penetrant BACE1 Inhibitor LY3202626 via a [3 + 2] Nitrone Cycloaddition
作者:Pablo Garcia-Losada、Amy C. DeBaillie、Jose Eugenio de Diego、Steven J. Green、Marvin M. Hansen、Carlos Jaramillo、Matt Johnson、Talbi Kaoudi、Jiuyuan Li、Peter J. Lindsay-Scott、Carlos Mateos、Dustin J. Mergott、Juan Antonio Rincon、Roger R. Rothhaar、Kevin D. Seibert、Brian M. Watson、Leonard L. Winneroski、Srinivas Gangula、Dajiang Jing、Hao Sun、Lei Zhang、Michael O. Frederick
DOI:10.1021/acs.oprd.9b00471
日期:2020.2.21
Herein we report a summary of the synthetic development of LY3202626 from the initial discovery route to a final route that was scaled to make 150 kg. Key developments include the use of a [3 + 2] cyclization to set the cis ring junction of the formed isoxazoline, a one-pot thiazine formation, and three different ways to install the aniline: (1) Cu-catalyzed azide coupling and reduction, (2) nitration
本文中,我们概述了LY3202626从最初的发现路线到最终制造成150千克最终路线的合成开发过程。关键的发展包括使用[3 + 2]环化来设置形成的异恶唑啉的顺式环结,一锅噻嗪的形成以及三种不同的苯胺安装方法:(1)铜催化的叠氮化物偶联和还原,(2)硝化和还原,以及(3)Buchwald与乙酰胺偶联。