The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ) is researched.Product Details of 591-12-8.David, Geraldo Ferreira; Pereira, Sarah de Paiva Silva; Fernandes, Sergio Antonio; Cubides-Roman, Diana Catalina; Siqueira, Rogerio Krohling; Perez, Victor Haber; Lacerda, Valdemar Jr. published the article 《Fast pyrolysis as a tool for obtaining levoglucosan after pretreatment of biomass with niobium catalysts》 about this compound( cas:591-12-8 ) in Waste Management (Oxford, United Kingdom). Keywords: levoglucosan preparation biomass sugarcane bagasse husk pyrolysis; Biomass pretreatment; Fast pyrolysis; Lignocellulosic agro-industrial wastes; Niobium catalysts; Pyrolytic sugars. Let’s learn more about this compound (cas:591-12-8).
Levoglucosan (LGA) is a promising chem. platform derived from the pyrolysis of biomass that offers access to a variety of value-added products. We report an efficient route to produce LGA via the pretreatment of biomass with niobium compounds (oxalate, chloride and oxide) followed by fast pyrolysis coupled with gas chromatog.-mass spectrometry (Py-GC-MS) at temperatures of 350-600°C. Catalytic pretreatment reduces the quantity of lignin in the biomass, concentrates the cellulose and enhance LGA formation during fast pyrolysis. The pretreatment also removes alk. metals, preventing competitive side reactions. The effect of several parameters such as catalyst weight, time, temperature, and solvent, with the optimal pretreatment conditions determined to be 3 (weight%) niobium oxalate for 1 h at 23°C in water. Pretreatment increased the LGA yields by 6.40-fold for sugarcane bagasse, 4.15-fold for elephant grass, 4.13-fold for rice husk, 2.86-fold for coffee husk, and 1.86-fold for coconut husk as compared to the raw biomasses. These results indicate that biomass pretreatment using niobium derivates prior fast pyrolysis can be a promising technique for biomass thermochem. conversion in LGA and others important pyrolytic products.
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Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia