Acidic ionic liquid modified silica gel as novel solid catalysts for esterification and nitration reactions

Perhydropyrimidinylium and 1,3-diazepinylium salts as potential ionic liquids

“…It has been shown 22 that reaction of pyridilide 15 with nitrosobenzene leads to formation of pyrido [1,2-a] [1,3,5]triazin-2-one 16 as the main product. Ionic liquid 10 was chosen as a medium for the reaction and reaction time was arbitrarily chosen as shorter than typical.…”

“…Application in organic synthesis is enormous and still increasing. They have become of great importance in development of laboratory or industrial catalytic processes [1][2][3][4] and biocatalysis. 5,6 They have been used in various polymerization processes and preparation of ion conductive polymer electrolytes.…”

Reusable and Efficient Polystryrene-supported Acidic Ionic Liquid Catalyst for Mononitration of Aromatic Compounds

“…Qiao 11 immobilized acidic ionic liquid to modified silica gel and used it to catalyze the nitration of aromatic compounds with 62% nitric acid. Recently, Wang 12 reported a new nitration system of PEG200- (20 mmol) and nitric acid (60 mmol) were charged successively into a three-neck flack and stirred at −10 o C for 2 h, then the reaction was allowed to proceed at appropriate temperature for some time.…”

Esterification process to synthesize isopropyl chloroacetate catalyzed by lanthanum dodecyl sulfate

“…An acid catalyst is usually needed to make the reaction occur at a useful rate. It has been reported that many acid catalysts used in the esterification reaction affect the reaction rate (Qiao et al, 2006;Cai et al, 2007).…”