Synthetic approaches towards the sulfonamide substituted-4,5-diaryl-4H-1,2,4-triazole-3-thiones
作者:Latifeh Navidpour、Mohsen Amini、Abbas Shafiee
DOI:10.1002/jhet.5570440614
日期:2007.11
5-diaryl-2,4-dihydro-3H-1,2,4-triazole-3-thiones 17/23. Alkylation of 17/23 afforded the alkylthio compounds 18/24. Final debenzylation was achieved with concentrated sulfuric acid to give the target sulfonamides 19/25.
首先制备了一系列新的3-烷硫基-4,5-二芳基-4 H -1,2,4-三唑,其在一个芳环(19/25)的对位具有SO 2 NH 2取代基得自适当的苯甲酸酰肼(15/21)。相应的酰肼与适当的异硫氰酸酯反应,得到16/22,将其在碱性介质中环化,得到4,5-二芳基-2,4-二氢-3 H -1,2,4-三唑-3-硫酮17 / 23。的烷基化17/23,得到烷硫基化合物18/24。用浓硫酸完成最终的脱苄基作用,得到目标磺酰胺19/25。