Total Synthesis of the COPD Biomarker Desmosine via Stepwise Sonogashira Cross-Coupling Reactions
作者:Haruka Yamada、Takahiro Hayashi、Toyonobu Usuki
DOI:10.1246/bcsj.20140394
日期:2015.5.15
biomarker and elastin crosslinker, is a tetrasubstituted pyridinium amino acid. In this paper, the total synthesi so f desmosine is described utilizing stepwise and regioselective palladium-catalyzed Sonogashira crosscoupling reactions of trihalopyridines and terminal alkynes as key steps. The 13-step synthesis starting from 4hydroxypyridine was achieved i n1 1% overall yield.
Desmosine 是一种 COPD 生物标志物和弹性蛋白交联剂,是一种四取代的吡啶鎓氨基酸。在本文中,利用逐步和区域选择性钯催化的三卤吡啶和末端炔烃的 Sonogashira 交叉偶联反应作为关键步骤,描述了全合成 so f desmosine。从 4-羟基吡啶开始的 13 步合成以 1% 的总产率实现。