Synthesis of 3,5-bis(acyl)-1,2,4-thiadiazoles via iodine mediated oxidative dimerization of α-oxothioamides
作者:Rajaghatta N. Suresh、Toreshettahally R. Swaroop、Veeresha Gowda Shalini、Kempegowda Mantelingu、Kanchugarakoppal S. Rangappa
DOI:10.1016/j.tetlet.2022.154302
日期:2023.2
A novel and an efficient method for the synthesis of 3,5-bis(acyl)-1,2,4-thiadiazoles by the oxidative cyclization of α-oxothioamides with assistance of molecular iodine has been reported. The required substrates – α-oxothioamides have been synthesized by the reaction of α-oxodithioesters with ammonium chloride and sodium acetate. The probable mechanism for the formation of products has presented.
报道了一种在分子碘的帮助下通过 α-氧代硫代酰胺的氧化环化合成 3,5-双(酰基)-1,2,4-噻二唑的新型有效方法。所需的底物 - α-氧代硫代酰胺已通过 α-氧代二硫酯与氯化铵和乙酸钠的反应合成。已经提出了产物形成的可能机制。两种不同的 α-氧硫代酰胺的杂环化提供了所有四种可能的产物。该协议在给定条件下产生了良好到极好的产量。值得注意的是,此方法中报告的反应可以以可扩展的方式使用。