Continuous-Flow Synthesis of Thioureas, Enabled by Aqueous Polysulfide Solution
作者:András Gy. Németh、Renáta Szabó、György Orsy、István M. Mándity、György M. Keserű、Péter Ábrányi-Balogh
DOI:10.3390/molecules26020303
日期:——
We have developed the continuous-flow synthesis of thioureas in a multicomponent reaction starting from isocyanides, amidines, or amines and sulfur. The aqueous polysulfide solution enabled the application of sulfur under homogeneous and mild conditions. The crystallized products were isolated by simple filtration after the removal of the co-solvent, and the sulfur retained in the mother liquid. Presenting
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