AbstractThe formation of amide bonds is an important process since this linkage is an essential component in proteins, pharmaceuticals, and other medicinally and biologically significant molecules. Recently, it was demonstrated that germylamines R3GeNR’2 were useful reagents for the conversion of acid fluorides to amides. This transformation occurs readily at room temperature and has a low activation energy. In the present study, the versatility of this amidation reaction with aryl acid fluorides is investigated. A series of thirteen acid fluorides with various substituents on the aromatic ring were reacted with the germylamine Ph3GeNMe2 and twelve of these were converted to the corresponding amides in high yields, the exception being 1,4‐benzenedicarbonyl difluoride. The germylamines Bun3GeNMe2 and Pri3GeNMe2 also could be used for this interconversion, and both of these species successfully converted 1,4‐benzenedicarbonyl difluoride to the corresponding amide. In addition, the crystal structure of Ph3GeNMe2 is reported. This represents one of only three crystallographically characterized germylamines. The synthesis and 19F NMR characterization of three fluorogermanes R3GeF (R=Bun, Pri, and Mes) are also reported herein.
摘要酰胺键的形成是一个重要的过程,因为这种连接是蛋白质、药物和其他具有药物和生物意义的分子的重要组成部分。最近的研究表明,胚芽胺 R3GeNR'2 是将酸性氟化物转化为酰胺的有用试剂。这种转化在室温下很容易发生,而且活化能很低。本研究探讨了这种与芳基酸性氟化物的酰胺化反应的多功能性。一系列在芳香环上具有不同取代基的 13 种酸氟化物与胚芽胺 Ph3GeNMe2 发生了反应,其中 12 种以高产率转化为相应的酰胺,1,4-苯二羰基二氟化物除外。胚芽胺 Bun3GeNMe2 和 Pri3GeNMe2 也可用于这种相互转化,它们都成功地将 1,4-苯二羰基二氟化物转化为相应的酰胺。此外,还报告了 Ph3GeNMe2 的晶体结构。这是仅有的三种具有晶体学特征的胚芽胺之一。本文还报道了三种氟锗(R3GeF,R=Bun、Pri 和 Mes)的合成和 19F NMR 表征。