Flexible oxidation of styrene using TBHP over zirconia supported mono-copper substituted phosphotungstate

Sadasivan, Rajesh; Patel, Anjali

doi:10.1039/c9ra04892h

Cited by 21 publications

(14 citation statements)

References 54 publications

(65 reference statements)

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“…The FT‐IR spectrum of NM‐SiO 2 @SiPA‐MA‐Arg showed the bands at about 2750–350 and 1650 cm −1 assigned to the stretching of the carboxylic acid and guanidine part of arginine. Based on the literature, the observed stretching frequencies at 891, 951 and 1079 cm −1 are attributed to P−O, W=O and W−O−W bands of the terminal oxygen of polyoxometalate moiety, respectively [52,53] . The latter signal has overlapped with strong stretching frequencies of CH 2 .…”

Section: Resultsmentioning

confidence: 82%

“…Based on the literature, the observed stretching frequencies at 891, 951 and 1079 cm −1 are attributed to P−O, W=O and W−O−W bands of the terminal oxygen of polyoxometalate moiety, respectively. [ 52 , 53 ] The latter signal has overlapped with strong stretching frequencies of CH 2 . These bands demonstrate the construction of the final catalyst.…”

Section: Resultsmentioning

confidence: 99%

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One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

Moussa

Rahmati

2021

ChemistryOpen

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The conversion of soluble polyoxometalate into insoluble polyoxometalate is considered to be one of the major challenges in synthetic organic chemistry. Here, polyoxometalate was bonded to the salt part of an organic branch immobilized on the silica‐coated Fe 3 O 4 nanoparticle and characterized using various techniques. The fabricated complex was used as a heterogeneous catalyst in a novel one‐pot reaction for synthesis of benzo[4,5]imidazo[1,2‐ a ]pyrimidin‐2‐ones using aromatic amines, dimethyl acetylenedicarboxylate (DMAD), derivatives of benzaldehyde and 2‐aminobenzimidazole in water/ethanol as a green solvent. 21 derivatives of benzo[4,5]imidazo[1,2‐ a ]pyrimidin‐2‐one were synthesized by this method and fully characterized. The high stability of the catalyst showed that it can be reused for 6 times without decreasing in activity. The combination of new synthetic method, new ferromagnetic heterogeneous nano‐catalyst, green solvent and simple separation method were presented in this work.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

Moussa

Rahmati

2021

ChemistryOpen

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“…Transition metal coordination polymers and metal–organic frameworks were used to catalyze the oxidation of styrene previously. [ 50,51 ] Many results suggested that the acidic condition is more conducive to the catalytic reaction. [ 52–54 ] Hence, the different amounts of HCl were used to investigate its influence.…”

Section: Resultsmentioning

confidence: 99%

Cu^I/Ag^I‐containing coordination compounds as advanced catalysts for selective oxidation of styrene to benzaldehyde

Zhao

Geng

Song

et al. 2022

Applied Organom Chemis

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Four coordination compounds, [Cu(Hmthd)2Cl]n (1), [Cu3(mthd)2Br]n (2), [Ag(mthd)]n (3), and [Ag2(mthd)I]n (4) (Hmthd = 2‐mercapto‐5‐methyl‐1,3,4‐thiadiazole), were synthesized and characterized by inductively coupled plasma (ICP) elemental analyses, powder X‐ray diffraction (PXRD), and Fourier transform infrared (FT‐IR) spectroscopies. These resulting coordination compounds can act as efficient catalysts for the oxidation of olefins with tert‐butyl hydroperoxide (TBHP) as oxidant. Wherein, compound 2 performed extremely enhanced catalytic activity for oxidation of styrene at 80°C. Moreover, the addition of an appropriate amount of acid can promote the protonation of ligands and activate the two Ag‐containing catalysts to improve their catalytic efficiencies. Experimental results indicate that catalyst 2 has a low activation energy and excellent recycle catalytic property. Radical trap experiments were performed to verify that free radicals participate in the oxidation of styrene.

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“…The oxidation of styrene using TBHP over zirconia supported mono-copper substituted phosphotungstate was studied by Sadasivan and coworkers [ 99 ]. The heterogeneous catalyst involving mono-copper substituted phosphotungstate and hydrous zirconia was prepared using the wet impregnation method and further evaluated for solvent-free oxidation of styrene.…”

Section: Other Materialsmentioning

confidence: 99%

Selective Styrene Oxidation to Benzaldehyde over Recently Developed Heterogeneous Catalysts

Andrade

Martins

2021

Molecules

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The selective oxidation of styrene under heterogeneous catalyzed conditions delivers environmentally friendly paths for the production of benzaldehyde, an important intermediate for the synthesis of several products. The present review explores heterogeneous catalysts for styrene oxidation using a variety of metal catalysts over the last decade. The use of several classes of supports is discussed, including metal–organic frameworks, zeolites, carbon materials and silicas, among others. The studied catalytic systems propose as most used oxidants tert-butyl hydroperoxide, and hydrogen peroxide and mild reaction conditions. The reaction mechanism proceeds through the generation of an intermediate reactive metal–oxygen species by catalyst-oxidant interactions. Overall, most of the studies highlight the synergetic effects among the metal and support for the activity and selectivity enhancement.

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Flexible oxidation of styrene using TBHP over zirconia supported mono-copper substituted phosphotungstate

Abstract: Mono-copper substituted phosphotungstate was supported on hydrous zirconia by wet impregnation, characterized and evaluated for its catalytic activity in the solvent-free flexible oxidation of styrene using TBHP as oxidant.

Cited by 21 publications

References 54 publications

One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

Cu^I/Ag^I‐containing coordination compounds as advanced catalysts for selective oxidation of styrene to benzaldehyde

Selective Styrene Oxidation to Benzaldehyde over Recently Developed Heterogeneous Catalysts

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Flexible oxidation of styrene using TBHP over zirconia supported mono-copper substituted phosphotungstate

Abstract: Mono-copper substituted phosphotungstate was supported on hydrous zirconia by wet impregnation, characterized and evaluated for its catalytic activity in the solvent-free flexible oxidation of styrene using TBHP as oxidant.

Cited by 21 publications

References 54 publications

One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

One‐Pot Synthesis of Benzo[4,5]imidazo[1,2‐a]pyrimidin‐2‐ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents

CuI/AgI‐containing coordination compounds as advanced catalysts for selective oxidation of styrene to benzaldehyde

Selective Styrene Oxidation to Benzaldehyde over Recently Developed Heterogeneous Catalysts

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Cu^I/Ag^I‐containing coordination compounds as advanced catalysts for selective oxidation of styrene to benzaldehyde