Chromatography‐Free Multicomponent Synthesis of Thioureas Enabled by Aqueous Solution of Elemental Sulfur
作者:András Gy. Németh、Renáta Szabó、Attila Domján、György M. Keserű、Péter Ábrányi‐Balogh
DOI:10.1002/open.202000250
日期:2021.1
The development of a new three‐component chromatography‐free reaction of isocyanides, amines and elemental sulfur allowed us the straightforward synthesis of thioureas in water. Considering a large pool of organic and inorganic bases, we first optimized the preparation of aqueous polysulfide solution from elemental sulfur. Using polysulfide solution, we were able to omit the otherwise mandatory chromatography
异氰化物、胺和元素硫的新型三组分无色谱反应的开发使我们能够在水中直接合成硫脲。考虑到大量的有机和无机碱,我们首先优化了从元素硫制备多硫化物水溶液的方法。使用多硫化物溶液,我们能够省略原本必须进行的色谱法,并通过简单的过滤直接从反应混合物中分离结晶产物,将硫保留在溶液相中。以这种方式合成的各种硫脲证实了我们的方案的合理底物和官能团耐受性。