A switchable-hydrophilicity solvent, N,N-dimethylcyclohexylamine, was used as a recyclable catalyst and solvent for aldol condensation, giving >97% pure product in 94% isolated yield without the need for purification or additional solvents. CO2-triggered separation produced yields greater than conventional workup and allowed facile recycling of the amine.
H. Poole, J. Gauthier, J. R. Vanderveen, P. G. Jessop and R. Lee, Green Chem., 2019, 21, 6263 DOI: 10.1039/C9GC02593F
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