Abstract
AbstractMolybdenum oxide‐modified cerium oxide (MoOx−CeO2) with 1 wt % Mo acted as an effective and reusable heterogeneous catalyst for Michael addition of dimethyl malonate to 2‐cyclohexen‐1‐one, providing high yield of the target product (99 %). The catalyst showed higher activity with high selectivity (>99 %) than simple metal oxides and the other combination of metal oxides and CeO2. Based on the catalyst characterization and experimental studies, MoOx species in the MoOx−CeO2 catalyst are isolated Mo6+, and the interface between the isolated MoOx and CeO2 is the active site. The activity based on the active site was about 74‐fold and 1800‐fold higher than that of CeO2 surface and the typical strong organic base of DBU (1,8‐diazabicyclo[5.4.0]undec‐7‐ene), respectively.
Published Version
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