Metal-triflate-catalyzed intramolecular Friedel–Crafts acylation of 3-arylpropanoic and 4-arylbutanoic acids in triflate-anion ionic liquids under monomodal microwave irradiation is reported. The environmentally benign synthetic procedure allows the formation of cyclic ketones in good yields within a short reaction time. The catalytic metal triflate in triflate-anion ionic liquids can be easily recovered and reused several times without significant loss of the catalytic performance.
- metal triflate
- Ionic liquid
Tran, P. H., Huynh, V. H., Hansen, P. E., Chau, D-K. N., & Le, T. N. (2015). An efficient and green synthesis of 1-indanone and 1-tetralone via intramolecular Friedel-Crafts acylation reaction. Asian Journal of Organic Chemistry, 4(5), 482-86.. https://doi.org/10.1002/ajoc.201402274