14705-63-6Relevant articles and documents
Bencosme, S.,Labady, M.,Romero, C.
, p. 15 - 18 (1986)
Oxidation of toluene to benzoic acid via VOTPP catalyst synthesized with an improved method
Chen, Xi,Jia, Jiaojiao,Niu, Yulan,Zhai, Lijun
, p. 1549 - 1555 (2020)
Abstract: In this paper, two-step method was used to synthesize 5,10,15,20-tetraphenyl-21H,23H-porphine vanadium(IV) oxide (VOTPP) and toluene catalytic oxidation was explored. The result showed that this catalyst led to benzoic acid as the main product and successfully simulated the reaction of toluene oxidation with the catalytic center of P-450 enzyme. Through testing the reaction conditions including used catalyst amount, temperature, pressure, and reaction time, the optimum reaction conditions were: 0.3 g VOTPP in 100 cm3 of toluene, 145 °C, 0.8 MPa, and 4 h. The conversion of toluene was 23.0% and the selectivity of benzoic acid could reach 86.0%. Its benefits lie in no solvent, mild reaction conditions, and no toxic acidic waste, making toluene oxidation a green process. Graphic abstract: [Figure not available: see fulltext.].
Cycloaddition of epoxide and CO2 to cyclic carbonate catalyzed by VO(IV) porphyrin
Bai, Dongsheng,Zhang, Zhiyong,Wang, Guangjian,Ma, Fang
, p. 240 - 243 (2015)
The cycloaddition of epoxide and CO2 to synthesize cyclic carbonate catalyzed by VO(IV) porphyrin was achieved under 1.4 MPa at 150°C. The effects of reaction temperature, time, CO2 pressure, co-catalyst and porphyrin framework were investigated. The catalytic results showed that moderate to high yields of cyclic carbonates were obtained under the optimal reaction conditions.
Observations on the Mechanochemical Insertion of Zinc(II), Copper(II), Magnesium(II), and Select Other Metal(II) Ions into Porphyrins
Atoyebi, Adewole O.,Brückner, Christian
supporting information, p. 9631 - 9642 (2019/03/26)
Building on a proof of concept study that showed the possibility of the mechanochemical insertion of some M(II) metals into meso-tetraphenylporphyrin using a ball mill as an alternative to traditional solution-based methods, we present here a detailed study of the influence of the many experimental variables on the reaction outcome performed in a planetary mill. Using primarily the mechanochemical zinc, copper, and magnesium insertion reactions, the scope and limits of the type of porphyrins (electron-rich or electron-poor meso-tetraarylporphyrins, synthetic or naturally occurring octaalkylporphyrins, and meso-triphenylcorrole) and metal ion sources suitable for this metal insertion modality were determined. We demonstrate the influence of the experimental metal insertion parameters, such as ball mill speed and reaction time, and investigated the often surprising roles of a variety of grinding agents. Also, the mechanochemical reaction conditions that remove zinc from a zinc porphyrin complex or exchange it for copper were studied. Using some standardized conditions, we also screened the feasibility of a number of other metal(II) insertion reactions (VO, Ni, Fe, Co, Ag, Cd, Pd, Pt, Pb). The underlying factors determining the rates of the insertion reactions were found to be complex and not always readily predictable. Some findings of fundamental significance for the mechanistic understanding of the mechanochemical insertion of metal ions into porphyrins are highlighted. Particularly the mechanochemical insertion of Mg(II) is a mild alternative to established solution methods. The work provides a baseline from which the practitioner may start to evaluate the mechanochemical metal insertion into porphyrins using a planetary ball mill.
