New catalytic oxidation of trifluoromethyl carbinols by a ruthenium(II) complex
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Acknowledgements
We thank CEFIPRA for the financial support and a research associateship grant (V.K.).
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Half-sandwich ruthenium(II)complexes containing O, N bidentate azo ligands: Synthesis, structure and their catalytic activity towards one-pot conversion of aldehydes to primary amides and transfer hydrogenation of ketones
2019, Journal of Organometallic ChemistryCitation Excerpt :Further, we believe that the catalytic transformation proceeds via the oxidative addition of the aldoxime N–OH bond to Ru(II), followed by nucleophilic attack on the coordinated imine, then β-elimination of cyclometalated, and finally reductive elimination to give the amide according to the mechanism proposed by Crabtree [40]. The present Ru(II) catalyst is more efficient in amidation reaction than the reported ruthenium(II) complexes in terms of reaction time, catalyst loading and isolated yields [41‒43]. Catalytic transfer hydrogenation reaction in which hydrogen is transferred from one organic molecule to another by ruthenium complexes is well known since one can avoid the use of molecular hydrogen and this prompted us to carry out this type of reactions.
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2018, Organic and Biomolecular ChemistryA practical synthesis of trifluoromethyl alkyl ketones
2015, Journal of Fluorine ChemistryCationic arene ruthenium(II) complexes bearing N, S chelating thiocarboxamides: Synthesis, structure, characterization and catalytic oxidation of alcohols
2012, Journal of Organometallic ChemistryCitation Excerpt :In view of the growing environmental concerns, development of environmental- friendly and operationally safe catalytic systems for organic oxidations using more tractable reagents such as molecular oxygen, aqueous hydrogen peroxide, and tert-butyl hydroperoxide (TBHP) are highly desirable [32,33]. RuCl2(PPh3)3 and some high valent oxoruthenium complexes are known to mediate alcohol oxidations using a variety of oxidants such as PhIO [34], NaIO4 [35], molecular oxygen [36], N-methylmorpholine N-oxide [37], tert-butyl hydroperoxide [38], chloramine-T [39], benzoquinone [40], hydrogen peroxide [41], BrO3− and S2O82− under mild conditions [42]. Ruthenium based oxidation catalysis is a powerful and extremely versatile synthetic tool to afford selectively oxygenate products both in homogeneous and in heterogeneous conversions [43].