VO(acac)₂Supported on Titania: A Heterogeneous Protocol for the Selective Oxidation of Sulfides Using TBHP

Catalytic oxidation of thioanisole Ph–S–CH3 over VOx/SiO2 and VOx/Al2O3 catalysts prepared by sol–gel method

“…More recently, reports have been published concerning the preparation of different heterogeneous vanadium catalysts based on titanium oxide [16], mesoporous silica [17], and USY zeolite [18]. Kantam et al.…”

“…Kantam et al. [16] tested VO(acac) 2 -TiO 2 , prepared by impregnation, in the sulfoxidation of thioanisole Ph-S-CH 3 ; the results showed a thioanisole conversion of 99% in 1.5 h and a sulfoxide/sulfone ratio of 97/3. However, Trukhan et al [17] found a problem of vanadium leaching into the solution and this accounts for the high thioanisole conversion of 98% after only 4 min.…”

Biphenyl derived oxovanadium(IV) and copper(II) salen-type complexes – structure and redox tuning

“…Comparable reaction times under similar reaction conditions for the enantioselective oxygenation of methyl phenyl sulfide were observed by Nakajima and co-workers [42]. A heterogenous approach for the selective oxidation of sulfides by VO(acac) 2 supported on titania was described previously [43].…”

A green synthesis of phenyl vinyl sulfoxide

“…Other efforts focused on the green and high-yield methods, which achieved great progress. These efforts employed hydrogen peroxide as the oxidant and used all kinds of metal compounds as the catalyst, including Re, V, Mn, Mo-Nb, and so on [8][9][10][11]. The disadvantage was obvious though; these metal compounds were always expensive for industrial use, difficult to recycle, and may cause new pollution problems.…”