Total syntheses of all tri-oxygenated 16-phytoprostane classes <i>via</i> a common precursor constructed by oxidative cyclization and alkyl–alkyl coupling reactions as the key steps
作者:Jakub Smrček、Radek Pohl、Ullrich Jahn
DOI:10.1039/c7ob02505j
日期:——
A unified strategy for the total synthesis of the methyl esters of all phytoprostane (PhytoP) classes bearing two ring-oxygen atoms based on an orthogonally protected common precursor is described. Racemic 16-F1t-, 16-E1-PhytoP and their C-16 epimers, which also occur as racemates in Nature, were successfully obtained. The first total synthesis of very sensitive 16D1tPhytoP succeeded, however, it
描述了一种基于正交保护的共同前体对具有两个环氧原子的所有植物前列腺素(PhytoP)类甲酯进行全合成的统一策略。成功获得了消旋体16-F1t-,16-E1-PhytoP及其C-16差向异构体,它们在大自然中也以消旋体形式出现。非常敏感的16D1tPhytoP的第一个全合成成功,但是,它很快异构化为更稳定的异构体,但是到目前为止,还未知的1316D1t-PhytoP,它可以用作D型PhytoP的更可靠的生物标记。六氟磷酸铁和TEMPO介导的自由基氧化环化作用使带有带有16个位置的氧官能团的链的双加氧环戊烷环接近。