Résumé The acid catalysed formation of diphenylmethyl (DPM) thioethers was successfully achieved using the protic ionic liquid (pIL) triethylamine:methanesulfonic acid (TeaMs) as the reaction solvent under microwave irradiation. A slight excess of methanesulfonic acid (10% v/v) was required to facilitate the reaction, which was applied to a variety of thiols. Aliphatic, aromatic and heterocyclic aromatic thiols were converted to their corresponding DPM thioethers in high yields (63–99%), in short reaction times (5–20 min) and using mild temperatures (80–100 °C). Finally, the pIL (TeaMS) was recycled five times without loss of yield.
摘要 在微波辐照下,以
三乙胺:
甲基磺酸(TeaMs)原生
离子液体(pIL)为反应溶剂,成功地实现了酸催化生成二苯基甲基(DPM)
硫醚。为促进反应的进行,需要略微过量的
甲磺酸(10% v/v),该反应适用于多种
硫醇。脂肪族、芳香族和杂环芳香族
硫醇在较短的反应时间(5-20 分钟)和温和的温度(80-100 °C)下被转化为相应的 DPM
硫醚,产率高(63-99%)。最后,pIL(TeaMS)被循环使用了五次,产率未受损失。