484-66-2Relevant articles and documents
Incl34h2o-catalyzed trioxane as a new methylating agent for multi-methylated aromatics affording hexamethyl benzene
Chen, Song-Jie,Hua, Ruimao
, p. 61 - 63 (2010)
In the presence of a catalytic amount of InCl3-4H2O, trioxane was first used as the methylating agent for multi- methylated aromatic compounds such as pentamethylbenzene, 1,2,4,5-tetramethylbenzene and 1,3,5-trimethylbenzene to afford hexamethylbenzene in fair to high yields.
Switchover of the Mechanism between Electron Transfer and Hydrogen-Atom Transfer for a Protonated Manganese(IV)–Oxo Complex by Changing Only the Reaction Temperature
Jung, Jieun,Kim, Surin,Lee, Yong-Min,Nam, Wonwoo,Fukuzumi, Shunichi
supporting information, p. 7450 - 7454 (2016/07/06)
Hydroxylation of mesitylene by a nonheme manganese(IV)–oxo complex, [(N4Py)MnIV(O)]2+(1), proceeds via one-step hydrogen-atom transfer (HAT) with a large deuterium kinetic isotope effect (KIE) of 3.2(3) at 293 K. In contrast, the same reaction with a triflic acid-bound manganese(IV)-oxo complex, [(N4Py)MnIV(O)]2+-(HOTf)2(2), proceeds via electron transfer (ET) with no KIE at 293 K. Interestingly, when the reaction temperature is lowered to less than 263 K in the reaction of 2, however, the mechanism changes again from ET to HAT with a large KIE of 2.9(3). Such a switchover of the reaction mechanism from ET to HAT is shown to occur by changing only temperature in the boundary region between ET and HAT pathways when the driving force of ET from toluene derivatives to 2 is around ?0.5 eV. The present results provide a valuable and general guide to predict a switchover of the reaction mechanism from ET to the others, including HAT.
Light-Driven, Proton-Controlled, Catalytic Aerobic C-H Oxidation Mediated by a Mn(III) Porphyrinoid Complex
Neu, Heather M.,Jung, Jieun,Baglia, Regina A.,Siegler, Maxime A.,Ohkubo, Kei,Fukuzumi, Shunichi,Goldberg, David P.
supporting information, p. 4614 - 4617 (2015/04/27)
The visible light-driven, catalytic aerobic oxidation of benzylic C-H bonds was mediated by a MnIII corrolazine complex. To achieve catalytic turnovers, a strict selective requirement for the addition of protons was established. The resting state of the catalyst was unambiguously characterized by X-ray diffraction as [MnIII(H2O)(TBP8Cz(H))]+, in which a single, remote site on the ligand is protonated. If two remote sites are protonated, however, reactivity with O2 is shut down. Spectroscopic methods revealed that the related MnV(O) complex is also protonated at the same remote site at -60 °C, but undergoes valence tautomerization upon warming.
