Molybdenum oxide/bipyridine hybrid material {[MoO3(bipy)][MoO3(H2O)]}n as catalyst for the oxidation of secondary amines to nitrones

Metal oxide-triazole hybrids as heterogeneous or reaction-induced self-separating catalysts

“…The material [MoO 3 (trz) 0.5 ] (trz = 1,2,4-triazole), which was first reported by Zubieta and co-workers [26], was chosen for study as part of our ongoing investigations into the catalytic properties of molybdenum(VI) and tungsten(VI) oxide-organonitrogen hybrid materials [27][28][29][30][31][32]. Depending on the structure and composition of these hybrids, as well as the catalytic reaction conditions, the materials typically act either as sources of soluble active species or (more http://dx.doi.org/10.1016/j.jcat.2016.06.005 0021-9517/Ó 2016 Elsevier Inc. All rights reserved.…”

Desulfurization and Denitrogenation Processes to Treat Diesel Using Mo(VI)‐Bipyridine Catalysts

“…Therefore, under the same reaction conditions, the catalyst 3 is the most efficient. This difference may be related to the different N-donor ligands present in each compound, i.e., the catalyst 4 possesses a derivative of the ligand 2,2 -bipyridine present in 3, but in the case of 4 the tert-butyl substituent groups may be responsible for greater steric repulsions, inhibiting the interaction between the catalyst and the oxidant and promoting a slower formation of the active species; the color of the catalyst/[BMIM]PF 6 system changed to bright yellow during the ODS reaction [36]. In the actual system, H 2 O 2 is present in a middle phase between the model diesel and RTIL phases, creating a triphasic system.…”

“…1) [33]. Compounds 3 and 4 gave interesting results in the catalytic epoxidation of non-functionalized olefins [32,33] and the oxidation of secondary amines to nitrones [36]. The absence of Mo-Cl bonds in 3 and 4 is advantageous with respect to their use as (pre)catalysts in reactions that may contain water.…”

[MoO3(2,2′–bipy)]n catalyzed oxidation of amines and sulfides

“…The catalytic potential of 1 for oxidation reactions was apparent after obtaining interesting results for the epoxidation of olefins using TBHP as oxidant [20,24]. In the present work, the oxidation power of this catalyst was tested for the oxidation of secondary amines to nitrones to compare its reactivity with that of other catalysts [22]. The study was then extended to the oxidation of sulfides to sulfoxides and sulfones.…”

“…was tested in the oxidation of secondary amines to nitrones using either urea hydrogen peroxide (UHP) adduct or TBHP as the oxidant, and proved to be a good water-tolerant catalyst for the oxidation of secondary amines under mild conditions [22].…”