Olefin epoxidation in solventless conditions and apolar media catalysed by specialised oxodiperoxomolybdenum complexes

Synthesis, structure and catalytic olefin epoxidation activity of a dinuclear oxo-bridged oxodiperoxomolybdenum(VI) complex containing coordinated 4,4′-bipyridinium

“…Oxoperoxo-molybdenum(VI) complexes are known to contain MoO(O 2 ) 2 , MoO(O 2 ) and MoO 2 (O 2 ) fragments, although the latter is rare [5]. These motifs are present in mononuclear complexes such as [MoO(O 2 ) 2 (L) n ] [6][7][8][9][10][11][12][13][14][15], [MoO(O 2 )Cl 2 (L) n ] acyclic alkenes. A limited number of studies have focussed on the epoxidation of olefins obtained from renewable resources such as citrus and turpentine oils, plant oils and fats [12,13,[24][25][26].…”

Room temperature aerobic oxidation of alcohols using CuBr2 with TEMPO and a tetradentate polymer based pyridyl-imine ligand

“…More recently, others have prepared pyridine terminated siloxane-derived ligands for use in a variety of applications including oxidation catalysis [45][46][47][48][49][50]. We have extended this approach to prepare a bis(pyridyl-imine) terminated siloxane ligand and herein, we report the first use of a series of tetradentate N-donor ligands in the aerobic oxidation of alcohols.…”

Oxodiperoxomolybdenum complex immobilized onto ionic liquid modified SBA-15 as an effective catalysis for sulfide oxidation to sulfoxides using hydrogen peroxide

“…Then, the material was treated with an aqueous solution of [Mo(O)(O 2 ) 2 (H 2 O) n ], prepared as described elsewhere [38], and the catalyst material SBA-15 + ImCl + MoO5 was obtained (Scheme 1). The ionic liquid grafting is firstly verified by solid state 1 H, 13 C{ 1 H} and 29 Si NMR.…”

“…Following our recent research on catalyzed oxidations in non-conventional media [32][33][34][35] and the acquired knowledge on oxodiperoxomolibdenum-catalyzed olefin epoxidation in ionic liquids [36][37][38][39][40] we decided to explore the oxodiperoxomolibdenumcatalyzed sulfide oxidation. In fact, we recently described a green approach to this process using hydrogen peroxide in ILs media [41].…”

“…Here, we present the next step in our research and report the preparation and characterization of a SILP based on mesoporous silica SBA-15, functionalized covalently with an imidazolium-based IL, and the use of this material in the oxidation of organic sulfides. The green advantages are (i) the use of easily available oxodiperoxomolybdenum complexes as catalysts, coming from economic and commercial MoO 3 , and efficient in oxidation reactions carried out in ILs [36][37][38][39][40]; (ii) the use of cheap and environmentally-benign aqueous hydrogen peroxide as oxidant [42,43]; (iii) favored selectivity to sulfoxide by the heterogeneization [44]; and, (iv) efficient catalyst recycling.…”