Selective hydration of dihydromyrcene in ionic liquids

The selective addition of water

“…Biphasic systems with zeolites as catalysts as well as triflic acid in ionic liquids have been studied for this. 5,22,23 Similar studies for the structurally more demanding α-pinene gave product mixtures. The alcohols dominated but no single alcohol could be obtained as the only product.…”

“…Even though waterin terms of sustainability and abundanceis an attractive reagent, it is rarely applied for the addition to double bonds in chemical processes. Indeed, only a few methods for the hydration of alkenes are reported, [5][6][7][8][9] of which only one is applied as a direct process for the synthesis of ethanol and similar alcohols. 10 Difficulties lie mainly in the activation of water as a nucleophile.…”

Study on the Alkoxylation of Dihydromyrcene over Cation Exchange Resins

“…Kozhevnikov et al used heteropoly acid catalyst H 3 PW 12 O 40 (HPA) to hydrate and acetoxylate DHM and finally gained dihydromyrcenol and dihydromyrcenyl acetate with 90% selectivity at the conversion of 21% . Direct hydration of DHM was investigated by Davey et al using ionic liquids as catalysts which remain totally selective under a series of conditions . Botella et al used H-beta zeolite to catalyze the alkoxylation, and it exhibited excellent selectivity to dihydromyrcenol with a nonprotic cosolvent…”

“…9 Direct hydration of DHM was investigated by Davey et al using ionic liquids as catalysts which remain totally selective under a series of conditions. 11 Botella et al used H-beta zeolite to catalyze the alkoxylation, and it exhibited excellent selectivity to dihydromyrcenol with a nonprotic cosolvent. 3 As new acid catalysts with high activity, good reusability, and feasibility for industry, cation exchange resins are also used to catalyze the reactions of DHM.…”

Facile synthesis of fructone from ethyl acetoacetate and ethylene glycol catalyzed by SO3H-functionalized Brønsted acidic ionic liquids

“…In recent years, ionic liquids (ILs) have attracted extensive research interest as clean catalysts and excellent solvents due to their unique physical and chemical properties, such as negligible vapour pressure, remarkable solubility, high thermal stability and effortless reusability. [8][9][10][11][12] Till now, some acidic ionic liquids have been successfully used in esterication, [13][14][15] alkylation, [16][17][18] acetalization, 19,20 ketalization, 21 hydration, 22,23 etc., which have showed high catalytic activity and selectivity. In 2001, Deng et al reported their early work on the acetalization and ketalization using acidic chloroaluminate ILs as catalyst with high conversion and selectivity.…”