Abstract
Without any additional organic solvent, the cyclotrimerization of aliphatic aldehyde could be catalyzed by acidic ionic liquid. Under optimum reaction conditions (298 K, 1 h, a molar ratio of 60:1 of isobutyraldehyde to ionic liquid), the conversion rate and selectivity for cyclotrimerization of isobutyraldehyde were 93.0 and 100%, respectively. The liquid product formed a separate phase that was decanted and the solid product could be separated by extraction. The ionic liquid could be easily reused after removal of water under vacuum.
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Gui, J., Liu, D., Chen, X. et al. Cyclotrimerization of an aliphatic aldehyde catalyzed by acidic ionic liquid. React Kinet Catal Lett 90, 35–43 (2007). https://doi.org/10.1007/s11144-007-4886-x
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DOI: https://doi.org/10.1007/s11144-007-4886-x