One-Pot, Three-Component Synthesis of Novel Spiro[3<i>H</i>-indole-3,2′-thiazolidine]-2,4′(1<i>H</i>)-diones in an Ionic Liquid as a Reusable Reaction Media
作者:Renuka Jain、Kanti Sharma、Deepak Kumar
DOI:10.1002/hlca.201200168
日期:2013.3
A facile one‐pot, three‐component protocol for the synthesis of novel spiro[3H‐indole‐3,2′‐thiazolidine]‐2,4′(1H)‐diones by condensing 1H‐indole‐2,3‐diones, 4H‐1,2,4‐triazol‐4‐amine and 2‐sulfanylpropanoic acid in [bmim]PF6 (1‐butyl‐3‐methyl‐1H‐imidazolium hexafluorophosphate) as a recyclable ionic‐liquid solvent gave good to excellent yields in the absence of any catalyst (Scheme 1 and Table 2). The
通过冷凝1 H-吲哚-2,3合成新型螺[3 H-吲哚-3,2'-噻唑烷] -2,4'(1 H)-二酮的简便的一锅三组分方案[bmim] PF 6(1-丁基-3-甲基-1 H-咪唑六氟磷酸盐)中的二氢二环乙烷,4 H -1,2,4-三唑-4-胺和2-硫烷基丙酸作为可循环使用的离子液体溶剂在不存在任何催化剂的情况下得到良好的至优异的产率(方案1和表2)。与常规方法相比,该方案的优势在于反应条件温和,产物收率高,反应时间短以及环境友好。