Thiocyanation of<i>N</i>,<i>N</i>-Dialkylhydrazonoyl Bromides: An Entry to Sulfur-Containing 1,2,4-Triazole Derivatives
作者:Alexis Prieto、Alexandre Uzel、Didier Bouyssi、Nuno Monteiro
DOI:10.1002/ejoc.201700819
日期:2017.8.2
A simple and practical one-pot protocol involving sequential C–H bromination and thiocyanation of readily available aldehyde-derived N,N-dialkylhydrazones has been established for the synthesis of 5-thioxo-1,2,4-triazolium inner salts. Application of the method toward the synthesis of value-added 3-sulfanyl-1,2,4-triazoles through N→S alkyl group transfer has also been demonstrated.
已经建立了一种简单实用的一锅法,包括对容易获得的醛衍生的 N,N-二烷基腙进行连续的 C-H 溴化和硫氰化,用于合成 5-thioxo-1,2,4-triazolium 内盐。该方法在通过 N→S 烷基转移合成高附加值的 3-硫烷基-1,2,4-三唑方面的应用也得到了证明。