A Facile and Green Protocol for Nucleophilic Substitution Reactions of Sulfonate Esters by Recyclable Ionic Liquids [bmim][X]
作者:Junghyun Chae、Yajun Liu、Yongnan Xu、Sun Jung
DOI:10.1055/s-0032-1317473
日期:——
Ionic liquids [bmim][X] (X = Cl, Br, I, OAc, SCN) are highly efficient reagents for nucleophilic substitution reactions of sulfonate esters derived from primary and secondary alcohols. The counter anions (X–) of the ionic liquids, [bmim][X], effectively replace the sufonates affording the corresponding substitution products such as alkyl halides, acetates, and thiocyanides in excellent yields. The
离子液体 [bmim][X] (X = Cl, Br, I, OAc, SCN) 是用于伯醇和仲醇衍生的磺酸酯亲核取代反应的高效试剂。离子液体的抗衡阴离子 (X-) [bmim][X] 有效地替代了磺酸盐,以优异的产率提供了相应的取代产物,如烷基卤化物、乙酸盐和硫氰化物。新开发的协议对环境非常有吸引力,因为在大多数情况下,反应使用化学计量的离子液体作为唯一试剂,不需要额外的溶剂、任何其他活化试剂、非常规设备或特殊预防措施。此外,这些离子液体可以很容易地回收利用而不会损失反应性,从而使整个过程“更环保”。