Novel bi-SO3H-functionalized ionic liquids based on piperazinium: Highly efficient and recyclable catalysts for the synthesis of beta-acetamido ketones

作者：Wang, Yuanyuan; Zhou, Junlong; Liu, Kun; Dai, Liyi^*

来源：Journal of Molecular Catalysis A: Chemical , 2013, 366: 195-201.

DOI：10.1016/j.molcata.2012.09.023

• Ionic liquids
• Bi-SO3H-functionalized
• Acidity characterization
• Hammett function
• Catalytic activity
• beta-Acetamido ketones

A series of novel bi-SO3H-functionalized ionic liquids were synthesized and acted as catalysts for the synthesis of beta-acetamido ketones. Compared with traditional single-SO3H-functionalized ionic liquids, less amount of catalysts, higher yields and shorter reaction time are the key features of this methodology. Hammett function values and the minimum-energy geometries of bi-SO3H-functionalized ILs were calculated and the results revealed that the acidities and catalytic activities of ILs in synthesis of beta-acetamido ketones were influenced by their structures. The IL[(PS)(2)pi][OTf](2) with the shortest H-O bond distance had the strongest acidity and the highest catalytic activity.

• 出版日期2013-1
• 单位华东师范大学