Ionic Liquids-Promoted Addition of Arylsulfinic Acids to <i>p</i>-Quinones: A Green Synthesis of Diaryl Sulfones
作者:J. Yadav、B. Reddy、T. Swamy、N. Ramireddy
DOI:10.1055/s-2004-829145
日期:——
Arylsulfinic acids undergo smooth conjugate addition to p-quinones in air- and moisture-stable second generation room temperature ionic liquid [bmim]BF 4 under mild conditions to produce the corresponding arylsulfonylhydroquinones in excellent yields with high selectivity. In this reaction, ionic liquid plays the dual role as the solvent and the catalyst. The quinones show enhanced reactivity in ionic
芳基亚磺酸在空气和水分稳定的第二代室温离子液体 [bmim]BF 4 中在温和条件下与对醌进行平滑共轭加成,以优异的收率和高选择性生成相应的芳基磺酰基氢醌。在这个反应中,离子液体起到了溶剂和催化剂的双重作用。醌类在离子液体中表现出增强的反应性,从而缩短了反应时间并显着提高了产率。离子液体的存在有助于避免使用酸或碱催化剂进行这种转化。回收的离子液体可重复使用四到五次,活性一致。