Synthesis, characterization and optimization of heterogeneous catalytic cyclohexene oxidation by tungstophospho(aqua)ruthenate via the fractional factorial design methodology

Abstract

Keggin-type tungstophospho(aqua)ruthenate (PRuW) was synthesized and supported on acid activated montmorillonite under mild conditions.

Cu(ii) coordinated N-bearing heteropolyacid-based poly(ionic liquid)s for allylic oxidation of cyclohexene to 2-cyclohexene-1-one with O2under mild conditions

“…Cyclohexene oxidation toward a,b-unsaturated oxygenated chemicals is of great significance for industrial application, since the products, especially 2-cyclohexene-1-one, have widespread applications for the synthesis of pharmaceuticals, perfumery and other valuable fine chemicals. [1][2][3][4][5][6][7][8] Industrially, the above process is commonly operated with toxic oxidants, such as chromium trioxide and chloroperoxybenzoic acid, which will cause severe environmental pollution and generate large amounts of undesirable waste. [9][10][11][12] Alternatively, the use of oxygen as the oxidant for cyclohexene oxidation toward 2-cyclohexene-1-one has received considerable interest by virtue of its low cost, availability and environmental benignity.…”

Highly Efficient Aerobic Oxidation of Cyclohexene Catalyzed by Iron(III) Porphyrins in Supercritical Carbon Dioxide

“…[1][2][3][4] Numerous methods for cyclohexene oxidation have been developed involving the use of various catalysts and stoichiometric oxidants such as TBHP (tert-butylhydrogen peroxide) or hydrogen peroxide. [5][6][7] With much attention drawn toward the green chemistry, cyclohexene oxidation by molecular oxygen is extremely attractive due to the economic and environmental oxidant. Therefore, numerous kinds of homogeneous and heterogeneous catalysts contained manganese, 8 copper, 9 cobalt, 10 iron, 11 gold 12 etc.…”