Concerning chemistry, reactivity, and mechanism of transition metal catalysed oxidation of benzylic compounds by means of ozone

Solvent-free aerobic oxidation of hydrocarbons and alcohols with Pd@N-doped carbon from glucose

“…The selective oxidation of organic compounds, such as alcohols or hydrocarbons, is a primary and essential transformation in organic synthesis and industrial chemistry 1 . Traditionally, various oxidants, such as toxic metal oxides 2 , peroxides (for example, tert-butylhydroperoxide 3 or hydrogen peroxide 4,5 ), halides 6 or ozone 7 , etc., were used for these transformations. Compared with those oxidants, undoubtedly, air is the most ubiquitous, atomeconomical and environmentally benign oxidant.…”

Selective Oxidation of Acetophenones Bearing Various Functional Groups to Benzoic Acid Derivatives with Molecular Oxygen

“…Infrared (IR) spectra were measured as thin films on NaCl plate or KBr press disk. 1 H and 13 C NMR spectra were measured at 270 and 67.5 MHz, respectively, in DMSO-d 6 or CDCl 3 with Me 4 Si as the internal standard. The products were characterized by 1 H NMR, 13 C NMR, and GC-MS.…”

“…[2] In order to avoid the use of toxic carbon monoxide, Cacchi et al obtained various benzoic acids by the Pd-catalyzed hydroxycarbonylation of aryl halides or triflates in the presence of acetic anhydride and lithium formate. [3] Silvani et al used Mo(CO) 6 as a commercially available stable CO source for the Pd-catalyzed hydroxycarbonylation of aryl triflates. [4] On the other hand, benzoic acids are also prepared by the oxidation of alkylbenzenes with powerful oxidants such as KMnO 4 [5] and ozone.…”

“…[4] On the other hand, benzoic acids are also prepared by the oxidation of alkylbenzenes with powerful oxidants such as KMnO 4 [5] and ozone. [6] However, it is difficult to selectively oxidize methylbenzenes bearing several functional groups by these oxidants. The conversion of alkyl aryl ketones to aromatic carboxylic acids with molecular oxygen by the use of MnA C H T U N G T R E N N U N G (NO 3 ) 2 and CoA C H T U N G T R E N N U N G (NO 3 ) 2 has been reported by Minisci et al [7] The simplest method is thought to be the direct aerobic oxidation of methylbenzenes, exemplified by the conversion of toluene to benzoic acid or p-xylene to terephthalic acid by using a Co catalyst or a Co/Mn/Br system, respectively.…”

Morphology‐Tuned Exceptional Catalytic Activity of Porous‐Polymer‐Supported Mn3O4 in Aerobic sp3 CH Bond Oxidation of Aromatic Hydrocarbons and Alcohols

“…Aerobic oxidative transformation of sp 3 CH bonds of aromatic hydrocarbons and alcohols into versatile functional groups including aldehydes, ketones, and imines has attracted considerable interest in fine‐chemical synthesis and petrochemical transformations 1. Generally, metal oxides,2 ozone,3 and some strong oxidizing agents under the reaction conditions such as temperature of over 200 °C and pressure of 0.5–2.5 MPa have been employed for the oxidation of sp 3 hybridized carbons in inactive aromatic hydrocarbons 4. Heterogeneous catalysts have received an increasing attention in controlling chemical reactivity for many industrial processes owing to their easy recovery, good recyclability, and high stability.…”