Efficient Multigram-Scale Synthesis of 7-Substituted 3-Methyltetral-1-ones and 6-Fluoromenadione
作者:Nathan Trometer、Matthieu Roignant、Elisabeth Davioud-Charvet
DOI:10.1021/acs.oprd.1c00421
日期:2022.4.15
Herein, we report a safe and economical multigram synthesis of 6-fluoromenadione, an intermediate in the synthesis of novel biologically active agents. The key to this six-step sequence process involves the condensation of the readily available starting 4′-fluoropropiophenone and glyoxylic acid, a bromination–elimination sequence from 7-fluoro-3-methyltetral-1-one allowing aromatization of the naphthol
在此,我们报告了一种安全且经济的多克合成 6-氟甲萘醌,一种合成新型生物活性剂的中间体。这个六步序列过程的关键涉及容易获得的起始 4'-氟苯丙酮和乙醛酸的缩合,这是一个从 7-fluoro-3-methyltetral-1-one 的溴化-消除序列,允许萘酚中间体芳构化,然后被氧化成相应的 6-氟甲萘醌。多克过程已从 25 g 起始材料规模得到证明,总产率提高了 50%,然后应用于五种其他 7-取代的 3-甲基四氢萘酮及其相应的 6-取代甲萘醌。