Use of Phosphazene Base BTPP for Phosphorylative Activation in the Scale-Up of BET Inhibitor GSK525762
作者:Rhiannon E. H. Jones、Peter Aspin、Suzanne H. Davies、Inderjit Mann、Catherine Priestley、Andrew D. Roberts、Natalia Zotova-Eldridge、John H. Leahy
DOI:10.1021/acs.oprd.2c00048
日期:2022.9.16
phosphorylative activation of lactam 4 were identified through the extensive screening of reagents and solvents, where a number of phosphazene bases were found to have unmatched activity. Development efforts focused on the use of phosphazene base P1-t-Bu-tris(tetramethylene) (BTPP) with diethyl chlorophosphoridate (DECP) and culminated in the demonstration of the new process at a 750 g scale. The resulting
在本文中,描述了一种改进的合成溴代和末端外结构域 (BET) 抑制剂 GSK525762 ( 1 ) 中关键三唑中间体的合成方法,这避免了关键甲基三唑并需要形成硫代酰胺中间体[ 1,4]苯二氮平形成。通过对试剂和溶剂的广泛筛选,确定了内酰胺4磷酸化活化的条件,其中发现许多磷腈碱基具有无与伦比的活性。开发工作侧重于使用磷腈基 P1- t-丁三(四亚甲基) (BTPP) 与氯磷酸二乙酯 (DECP) 并最终以 750 克的规模展示了新工艺。所得合成路线避免了使用硫醇化剂 P 2 S 5和分离所得硫代酰胺,同时以更少的步骤提供了极高纯度的1,与之前的工艺相比,产生了更高的产率和更高的产量。