III International Conference

OXIDATION TRIMETHYLHYDROHYNONE IN THE PRESENTIMMOBYLIZATHON NITROXYL RADICALPP-II-15Berdugin Yu.A., Mikushina Yu.V., Kharchuk V.G., Petrov L.A., Yatluk Yu.G.Resnikov V.N. 1 , Grigor’ev I.A. 2 , Molochnikov L.S. 3Institute of Organic Synthesis UB RAS, Ekaterinburg, Russia1 Novosibirsk state university, Novosibirsk, Russia2 Novosibirsk Institute of Organic Chemistry SB RAS, Novosibirsk, Russia3 Ural state forest engineering university, RussiaE-mail: yatluk@ios.uran.ruIt is investigated catalytic activity modified by nitroxyl radicalsaminopropylpolysiloxanes in modelling reaction oxidations of thrimethylhydroquinone.It is known, that a 2,2,6,6-tetramethylpiperidinyloxyl radical immobilizating on silicacatalized oxidation of alcohols by salts copper [1]. Oxidation of phenols in similar systems isnot described. The purpose of the present work was comparative research of cataliticalactivity modified by nitroxyl radical aminopropylpolysiloxane in modeling reaction liquidphaseoxidation of thrimethylhydroquinone oxygen of air in a water-methanol solution.For researches it is used silica gel (1), synthesized by hydrolysis tetraethoxysilane atpresence propylamine; aminopropylpolysiloxane (2) received cohydrolysis oftetraethoxysilane and aminopropyltriethoxysilane (molar retio - 2:1) andaminopropylpolysiloxane (3) modified 2,2,5,5-pentamethylimidazolyl-1-oxyl radicals (3),which synthesis carred out on the scheme (content radical 8 mol%/NH 2 ):Br(OEt) 3 Si(CH 2 ) 3 NH(EtO) 3 Si(CH 2 ) 3 NH 2 +NNNaOC 2 H 5-NaBr, EtOHNNSi(OEt) 4 , H 2 O-EtOHnSiO 2 . SiO 1 , 5 (CH 2 ) 3 NHNN O .O .O .The technique of experiment is stated in [2]. Diagrams of dependence of initial speed ofoxidation from structure of the catalyst (not containing copper - at the left and containing it -on the right) are submitted below.189