1-(Alkylsulfonic)-3-methylimidazolium chloride Brönsted acidic ionic liquid catalyzed hydrogen peroxide oxidations of biomass derived furan aldehydes

A comparison of homogeneous and heterogeneous Brønsted acid catalysts in the reactions of meso-erythritol with aldehyde/ketones

“…Similar interactions between multiple hydroxyl and carboxylic acid groups are reported in the literature in carbohydrate systems [41]. In the case of 4-heptanone the change in homogenous catalyst from p-TsOH to Brønsted acidic ionic liquid [(HSO 3 ) 3 C 3 C 1 im][Cl] showed an improvement in selectivity towards the bis-ketal product and this type of selectivity as well as reaction product changes are known in the use of acidic ionic liquids in place of classical homogeneous acid catalysts [42]. The three cyclic ketones 2e-g exclusively gave the bis-ketal products 3e-g with all catalysts tested.…”

Development of Sustainable Catalytic Pathways for Furan Derivatives

“…For instance, 90%–92% yield of succinic anhydride was obtained from HMF by oxidation with 30% H 2 O 2 using 10 mol% 1-(alkylsulfonic)-3-methylimidazolium chloride acidic ILs as catalysts at 60°C for 14 h. The IL catalyst was recovered four times, with negligible loss in the catalytic performance. In addition, oxidation of furfural under similar reaction conditions afforded a mixture of three chemicals: 2(5H)-furanone, succinic anhydride, and maleic acid in 68%, 8%, and 12% yields, respectively ( Amarasekara and Okorie, 2018 ).…”

Ionic Liquids in Biomass Processing

“…On the other hand oxidation of furfural under similar IL catalyzed conditions produced a mixture of three products: 2(5H)-furanone, succinic anhydride and maleic acid in 68, 8 and 12 % yields respectively (Figure 8). [197]…”

“…The IL catalyst could be reused for four cycles without appreciable loss in the catalytic activity. On the other hand oxidation of furfural under similar IL catalyzed conditions produced a mixture of three products: 2(5H)‐furanone, succinic anhydride and maleic acid in 68, 8 and 12 % yields respectively (Figure ) …”