32785-53-8Relevant academic research and scientific papers
Laccase-TEMPO as an efficient catalyst system for metal- and halogen-free aerobic oxidation of thioethers to sulfoxides in aqueous media at ambient conditions
Rostami, Amin,Mohammadi, Behnaz,Shokri, Zahra,Saadati, Shaghayegh
, p. 59 - 63 (2018/11/23)
We present for the first time an eco-friendly procedure for the aerobic oxidation of thioethers to sulfoxides using laccase-TEMPO catalyst system. This catalyst system allows for simpler (easy work-up) and greener methodologies (room temperature, phosphate buffer) while keeping high reaction yields and selectivity. This work is superior to others due to free from any transition metal and halide co-catalysts.
Nano-sized glass as an economically viable and eco-benign support to anchor heteropolyacids for green and sustainable chemoselective oxidation of sulfides to sulfoxides
Zolfagharinia, Somayeh,Kolvari, Eskandar,Koukabi, Nadiya,Hosseini, Maliheh M
, p. 1411 - 1421 (2017/09/25)
Abstract: In this work, glass wastes were employed as cost-effective supports for the immobilization of phosphomolybdic acid (5–25 wt.% PMA) through an impregnation method. The highly efficient and retrievable nanocatalyst named nano-glass waste-supported phosphomolybdic acid (n-GW/PMA) was fully characterized by several techniques such as: XRD, FE-SEM, EDX, FT-IR and TGA. The catalytic performance of the as-synthesized heterogeneous nanocatalyst was effectively investigated for the chemoselective oxidation of sulfides to sulfoxides in the presence of 30% H 2O 2 as an oxidant at room temperature under solvent-free condition. Optimization of the reaction conditions was performed by means of central composite design (CCD), which is one of the powerful response surface methodologies. Based on the results obtained under the optimum condition, the sample of 16 wt.% of PMA loading offered high conversion rates and yields (97%). Besides, the beneficial points of the prepared catalyst were its recoverability and reusability for several reaction cycles, low-cost and toxicity, easy availability and facile production. Graphical abstract: Nano-glass waste-supported phosphomolybdic acid (n-GW/PMA) was synthesized as a novel, highly efficient and retrievable nanocatalyst for the chemoselective, green and rapid oxidation of sulfides to sulfoxides through an experimental design (CCD) approach. The prepared catalyst was characterized by FT-IR, TGA, XRD, FE-SEM and EDX techniques. [Figure not available: see fulltext.].
A BIPHASIC PROCESS FOR THE OXIDATION OF SULFIDES: A NEW CONVENIENT ROUTE TO SULFOXIDES.
Gasparrini, F.,Giovannoli, M.,Maresca, L.,Natile, G.,Palmieri, G.
, p. 1111 - 1118 (2007/10/02)
A biphasic (nitromethane/water) process is provided for the oxidation of alkyl- and aryl-sulfides by aqueous nitric and sulfuric acids (20percent each).This represents a preparatively useful and convenient route to sulfoxide.
