Application In Synthesis of 5-Methylfuran-2(3H)-one. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Conversion of Biomass-Derived Methyl Levulinate to Methyl Vinyl Ketone. Author is El Ouahabi, Fatima; Smit, Wietse; Angelici, Carlo; Polyakov, Mykola; Rodemerck, Uwe; Fischer, Christine; Kalevaru, V. Narayana; Wohlrab, Sebastian; Tin, Sergey; van Klink, Gerard P. M.; van der Waal, Jan C.; Orange, Francois; de Vries, Johannes G..
A high-throughput screening exercise testing 60 different catalysts resulted in 5 wt % Pt on sulfided carbon as the best catalyst in the conversion of bio-based Me levulinate (ML) to Me vinyl ketone (MVK) in a gas-phase continuous process. Up to 18% yield of MVK was obtained, but fast catalyst deactivation was observed For a better understanding of the reaction mechanism, the potential reaction intermediates [α-angelica lactone (α-AL), γ-valerolactone, Me Et ketone (MEK), and levulinic acid (LA)] were also fed as starting materials under the same reaction conditions as those used for ML. Of the different pathways possible, the route via AL seems to be the most likely route. Since the side product methanol led to the hydrogenation of MVK to MEK, LA is a better substrate in this reaction toward MVK at a medium reaction temperature Herein, we report the highest yield of MVK (>50%) from LA at 350°C. However, this knowledge of the reaction pathway via AL also opened up the possibility of a high-temperature conversion process of ML to MVK. It was found that ML could be converted to MVK in 71% selectivity at 600°C using 40% CaO on γ-Al2O3 as the catalyst. Here, the catalyst merely serves to accelerate the ring closure of ML to AL, which undergoes an electrocyclic reaction under extrusion of CO to form MVK.
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