Design of A Metabolically Stable Tritium-Tracer of the PI3K<i>δ</i>-Inhibitor CDZ173 (Leniolisib) as a Tool to Study Liver Metabolites
作者:Carsten Bauer、Tong Luu、Fabian Eggimann、Patrick Bross、Werner Gertsch、Cheng Hu、Philippe Ramstein、Julien Bourgailh、Albrecht Glänzel、Ina Dix、Christian Guenat、Nicolas Soldermann、Karine Litherland、Sandrine Desrayaud、Jean-Claude Hengy、David Pearson、Joachim Blanz、Christoph Burkhart
DOI:10.1002/hlca.201800044
日期:2018.6
of the unlabeled compound and the synthesis of its metabolically stable tritium isotopologue 1b used for metabolite structure confirmation. Access to 1b was achieved when a halogenated precursor was subject to Hal/3H‐exchange. Hence, [3H]CDZ173 with specific activity 630 GBq/mmol, HPLC‐RA 97% and ee = 99.2% was obtained. Synthetic key to the precursor was using a bis‐halo‐pyridine in a Pd‐catalyzed mono‐amination
在本公开中,我们总结了PI3K的初步代谢谱δ抑制剂CDZ173(leniolisib,1A来自未被标记的化合物的温育获得的)和它的代谢稳定的氚同位素合成1b中用于代谢物结构的确认。访问1B当一种卤化前体有待哈尔/达到3 H-交换。因此,[ 3 H] CDZ173的比活为630 GBq / mmol,HPLC-RA为97%,ee = 99.2%。前驱体的合成关键是在四氢吡啶并嘧啶核的钯催化单胺化反应中使用双卤代吡啶。合成前体的立体化学通过未标记的双卤代吡啶的X射线分析和ti代物质的手性HPLC确认。3标记在靶标中的正确位置通过3确认H-NMR差异光谱。此外,我们报告了放射性示踪剂作为临床前ADME与肝细胞孵育的工具的有效性。基于此数据,我们提出了leniolisib的定量代谢物特征,该特征已通过独立合成的代谢物参考得到证实。通过NMR研究CDZ173的构象,表明两个不同的酰胺主链各具有特定的吡咯烷褶皱。