70128-24-4

Upstream product

• 110-22-5 diacetyl peroxide 
• 935-92-2 2,3,5-Trimethyl-1,4-benzoquinone 
• 527-18-4 Durohydroquinone 
• 95-93-2 1,2,4,5-tetramethylbenzene 
• 29815-58-5 tetramethyl-[1,4]benzoquinone-diimine 
• 79-21-0 peracetic acid 
• 2416-94-6 2,3,6-trimethylphenol 
• 13199-54-7 1,4-dimethoxy-2,3,5,6-tetramethylbenzene 
• 527-35-5 2,3,5,6-tetramethylphenol 
• 22311-37-1 durosemiquinone radical 
• 92916-95-5 tetramethyl-p-quinonemethide 
• 2604-45-7 2,3,5,6-tetramethylbenzoic acid 
• 2243-32-5 pentamethylbenzoic acid 
• 779976-14-6 durosemiquinone anion radical 

Downstream Products

• 23585-22-0 3a,4a,7a,8a-Tetramethyl-1,7,7a,8a-tetrahydro-3aH,4aH-benz<1,2-c;4,5-c'>dipyrazol-4,8-dion 
• 527-18-4 Durohydroquinone 
• 82363-84-6 1,2,4,5-Tetramethyl-3,6-bis-trimethylsilanyloxy-benzene 
• 91238-42-5 1-Benzyl-1,4-dihydro-pyridine-3-carboxylic acid amide; compound with 2,3,5,6-tetramethyl-[1,4]benzoquinone 
• 97098-54-9 C₁₄H₂₂O₅P 
• 779976-14-6 durosemiquinone anion radical 
• 96914-21-5 tetramethyl-1,4-benzoquinone-tetramethyl-1,4-hydroquinone 
• 82414-91-3 4-(triethylsilyloxy)-2,3,5,6-tetramethylphenoxy 
• 130021-86-2 C₁₉H₃₉O₂Si₄ 
• 90508-37-5 N,N'-Dicyano-2,3,5,6-tetramethyl-1,4-benzoquinonediimine 
• 16404-66-3 4-hydroxy-2,4,6-trimethyl-cyclohexa-2,5-dienone 
• 52103-92-1 4-Hydroxy-3,4,5,5-tetramethyl-2-cyclohexen-1-on 
• 55776-84-6 4-hydroxy-3,4,5-trimethyl-2,5-cyclohexadien-1-one 
• 31464-76-3 4-hydroxy-2,3,4,5,6-pentamethyl-2,5-cyclohexadien-1-one 

Relevant academic research and scientific papers

Pentamethylphenyl (Ph*) and Related Derivatives as Useful Acyl Protecting Groups for Organic Synthesis: A Preliminary Study

A study of acyl protecting groups derived from the Ph? motif is reported. While initial studies indicated that a variety of functional groups were not compatible with the Br 2-mediated cleavage conditions required to release the Ph? group, strategies involving the use of different reagents or a modification of Ph? itself (Ph*OH) were investigated to solve this problem.

Photocatalytic Hydrogen Evolution from Plastoquinol Analogues as a Potential Functional Model of Photosystem I

The recent development of a functional model of photosystem II (PSII) has paved a new way to connect the PSII model with a functional model of photosystem I (PSI). However, PSI functional models have yet to be reported. We report herein the first potential functional model of PSI, in which plastoquinol (PQH2) analogues were oxidized to plastoquinone (PQ) analogues, accompanied by hydrogen (H2) evolution. Photoirradiation of a deaerated acetonitrile (MeCN) solution containing hydroquinone derivatives (X-QH2) as a hydrogen source, 9-mesityl-10-methylacridinium ion (Acr+-Mes) as a photoredox catalyst, and a cobalt(III) complex, CoIII(dmgH)2pyCl (dmgH = dimethylglyoximate monoanion; py = pyridine) as a redox catalyst resulted in the evolution of H2 and formation of the corresponding p-benzoquinone derivatives (X-Q) quantitatively. The maximum quantum yield for photocatalytic H2 evolution from tetrachlorohydroquinone (Cl4QH2) with Acr+-Mes and CoIII(dmgH)2pyCl and H2O in deaerated MeCN was determined to be 10%. Photocatalytic H2 evolution is started by electron transfer (ET) from Cl4QH2 to the triplet ET state of Acr+-Mes to produce Cl4QH2?+ and Acr?-Mes with a rate constant of 7.2 × 107 M-1 s-1, followed by ET from Acr?-Mes to CoIII(dmgH)2pyCl to produce [CoII(dmgH)2pyCl]-, accompanied by the regeneration of Acr+-Mes. On the other hand, Cl4QH2?+ is deprotonated to produce Cl4QH?, which transfers either a hydrogen-atom transfer or a proton-coupled electron transfer to [CoII(dmgH)2pyCl]- to produce a cobalt(III) hydride complex, [CoIII(H)(dmgH)2pyCl]-, which reacts with H+ to evolve H2, accompanied by the regeneration of CoIII(dmgH)2pyCl. The formation of [CoII(dmgH)2pyCl]- was detected by electron paramagnetic resonance measurements.

Potential for release of pulmonary toxic ketene from vaping pyrolysis of Vitamin E acetate

A combined analytical, theoretical, and experimental study has shown that the vaping of vitamin E acetate has the potential to produce exceptionally toxic ketene gas, which may be a contributing factor to the upsurge in pulmonary injuries associated with using e-cigarette/ vaping products. Additionally, the pyrolysis of vitamin E acetate also produces carcinogen alkenes and benzene for which the negative long-term medical effects are well recognized. As temperatures reached in vaping devices can be equivalent to a laboratory pyrolysis apparatus, the potential for unexpected chemistries to take place on individual components within a vape mixture is high. Educational programs to inform of the danger are now required, as public perception has grown that vaping is not harmful.

Synthesis and characterization of a novel ruthenium(ii) trisbipyridine complex magnetic nanocomposite for the selective oxidation of phenols

Anchoring ruthenium(ii) trisbipyridine complex [Ru(Bpy)3]2+ into a magnetic dendritic fibrous silica nanostructure produces an unprecedented strong nanocatalyst, FeNi3/DFNS/[Ru(Bpy)3]2+. Impressive oxidation of phenols to 1,4-benzoquinones catalyzed by FeNi3/DFNS/[Ru(Bpy)3]2+ is obtained in acetonitrile and water solution with molecular dioxygen as oxidant. Exclusively, apparently inert phenols such as phenol itself and mono-alkyl-substituted phenols are impressively oxidized to produce 1,4-benzoquinones through activation of the C-H bond in the position para to the carbon-oxygen bond under mild conditions. In addition, the production of industrially significant quinones that are known intermediates for vitamin combinations is investigated and studied FeNi3/DFNS/[Ru(Bpy)3]2+ magnetic nanoparticles were produced, and their properties were investigated by AFM, FTIR, XRD, TGA, SEM, TEM, and VSM.

Selective activation of C–H bond into C[dbnd]O bond of phenols in para-position via aerobic oxidation

An efficient method for the oxidation of phenols to 1,4-benzoquinones catalyzed by cuprous(I) chloride was achieved in a solution of acetonitrile and water using molecular dioxygen as an oxidant. Particularly, the inert phenols, such as phenol and mono-alkyl substituted phenols, were effectively oxidized to 1,4-benzoquinones via the selective activation of C–H bond in para-position into C[dbnd]O bond under mild conditions. The catalyst shows high activity for unsubstituted or alkyl substituted phenols, but no effect on substituted phenols with electron-withdrawing groups. This study offers an aerobic method for the selective oxidation of aromatic phenols to 1,4-benzoquinones.

Bismuth-catalyzed methylation and alkylation of quinone derivatives with tert-butyl peroxybenzoate as an oxidant

A bismuth-catalyzed methylation of quinones in the presence of tert-butyl peroxybenzoate (TBPB) was developed via a radical reaction mechanism. Particularly, TBPB was used not only as an efficient oxidant, but also as a green methyl source in such transformation. Moreover, this method could also be efficiently extended to the alkylation of quinones. This reaction tolerated a series of functional groups and prepared a series of derivatives of vitamin K3 and benzoquinone. Notably, antimalarial parvaquone was synthesized by the reaction.

Selective iron-catalyzed oxidation of phenols and arenes with hydrogen peroxide: Synthesis of vitamin e intermediates and vitamin k3

(Figure Presented). Pumping iron! Convenient iron-based catalyst systems for the selective oxidation of arenes and phenols with hydrogen peroxide to give 1, 4-quinones have been developed. This selective oxidation reaction takes place under mild conditions (room temperature, alcoholic solvents) with H 2O2 as the terminal oxidant.

Polymer incarcerated gold catalyzed aerobic oxidation of hydroquinones and their derivatives

Polymer-incarcerated gold (PI Au) cluster catalysts mediated aerobic oxidation of hydroquinones and catechols to quinones very efficiently under mild conditions. The characteristic role of water in the reaction system was also observed. Copyright

Aerobic oxidation of hydroquinone derivatives catalyzed by polymer-incarcerated platinum catalyst

(Chemical Equation Presented) It's a lock-in! A remarkably wide substrate scope of hydroquinones are oxidized to quinones in high yields in a platinum-catalyzed process with as low as 0.05 mol% catalyst. The aerobic oxidation is catalyzed by platinum nanoclusters trapped in a styrene-based polymer network (see scheme, PI Pt=polymer-incarcerated nanoclusters). The catalyst could be reused at least 13 times without any loss of catalytic activity.

Intramolecular hydroarylation of alkynes catalyzed by platinum or gold: Mechanism and endo selectivity

The cyclization of differently substituted aryl alkynes with Pt II or AuI catalysts proceeds by endo-dig pathways. When AgI was used to generate reactive cationic AuI catalysts, 2H-chromenes dimerize to form cyclobutane derivatives by a Ag I-catalyzed process. A DFT study on the cycliza-tion mechanism shows a kinetic and thermodynamic preference for 6-endodig versus 5-exo-dig cyclizations in PtII-catalyzed processes. Calculations indicate that although Friedel-Crafts and the cyclopropanation processes via metal cyclopropyl carbenes show very similar activation energies, platinum cyclopropyl carbenes are the stationary points with the lowest energy.