52098-50-7Relevant academic research and scientific papers
Synthesis, electrosynthesis and electrochemical properties of substituted 2,2,6,6-tetramethylpiperidine and the respective stable nitroxyl radicals. XIV
Avrutskaya, Inna A.,Novikov, Vasilii T.,Dziegiec, Jozef,Grzejdziak, Andrzej,Krzyczmonik, Pawel,Scholl, Henryk
, p. 36 - 45 (2007/10/03)
The various derivatives of 2,2,6,6-tetramethylpiperidine and their stable nitroxyl radicals were investigated by means of chemical, electrochemical and empirical calculation methods. The titration results were calculated by means of TURBO BASIC with PKAS and MINIGLASS algorithm, and the prototropic experimental data were obtained. The reaction ways were calculated on the basis of the formation enthalpie values which were calculated by means of AM 1 (MOPACK) method. On the basis of a voltammetry and an electrolysis under controlled potential the reaction products were analyzed and the yields of the investigated processes were received. The various quasireversible redox reactions of the type stable nitroxyl radical oxoannonium cation were investigated by means of a cyclic voltammetry and electrochemical impedance spectroscopy. The mechanisms of the investigated reactions have been discussed and the reaction schemes are presented. - Key words: derivatives of 2,2,6,6-tetramethylpiperidine; electrolysis; electrochemical impedance spectroscopy; formation enthalpy values; prototropic constants
PREPARATION OF 2,2,6,6-TETRAMETHYL-4-AMINOPIPERIDINE AND ITS SUBSTITUTED COMPOUNDS BY ELECTROREDUCTION OF AZOMETHINES OF 2,2,6,6-TETRAMETHYL-4-OXOPIPERIDINE (TRIACETONAMINE)
Fioshin, M. Ya.,Avrutskaya, I. A.,Surov, I. I.,Novikov, V. T.
, p. 182 - 191 (2007/10/02)
Five methods have been developed for electrosynthesis of 2,2,6,6-tetramethyl-4-aminopiperidine in 95 - 98 percent yield via the lead-cathode reduction of 2,2,6,6-tetramethyl-4-oxiimino-piperidine, a mixture of triacetonamine with inorganic salts of hydroxylamine, and a mixture of triacetonamine with nitric acid in a solution of sulphuric acid, via the reduction of azine triacetonamine and of a mixture of triacetonamine with inorganic salts of hydrazine in a neutral solution.The corresponding saturated derivatives of 2,2,6,6-tetramethyl-4-aminopiperidine have been obtained in 60 - 80 percent yield by ele ctroreduction of phenylimine and ethylene diimine.
