TiO₂@UiO-68-CIL: A Metal–Organic-Framework-Based Bifunctional Composite Catalyst for a One-Pot Sequential Asymmetric Morita–Baylis–Hillman Reaction

A chiral ionic liquid (CIL) moiety of a l-pyrrolidin-2-ylimidazole-decorated homochiral UiO-68-type metal–organic framework, UiO-68-CIL (1), was successfully prepared by the combination of a new premodified chiral CIL ligand (H₂L-CIL) and ZrCl₄ via a solvothermal method. The TiO₂-loaded TiO₂@UiO-68-CIL (2) was prepared by impregnating 1 in a toluene solution of Ti­(OPrⁱ)₄ and sequential in situ hydrolysis. The obtained 2 can be a bifunctional asymmetric heterogeneous catalyst to successfully promote the one-pot Morita–Baylis–Hillman reaction starting from aromatic alcohols in a tandem way.