Process for the preparation of compounds 2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl tetramethyl piperidin - N - u00f3xi and 2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl tetramethyl piperidin - N - hydroxy 4 - substituu00ecdos

摘要

Process for the preparation of compounds 2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl tetramethyl piperidin - N - u00f3xi and 2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl tetrametilpiperidin - N - hydroxy 4 - substituu00ecdos ".The present invention refers to a process for the preparation of compounds 2,2,6,6-tetramethyl-1-octyloxy-4-piperidyl tetramethyl piperidin - N - u00f3xi 4 - substituted u00a2111 and mixtures of u00a2111 compounds and 2,2,6,6 - tetramethyl piperidin - N - 4 - hydroxy substituted u00a2111! In which X + y = O and may represent a cetal cyclical with the radicals or may represent a cetal in open chain, in which x = 0 and y = R 0r 39,Where R and R 39 may be equal to or different from each other and are in each case ch ~ 3 ~, ch - CH ~ ~ 2 ~ ~ 2 ~ 3 ~, ch - CH - CH ~ ~ 2 ~ 3 ~, CH (CH ~ 3 ~) - CH ~ 3 ~.Ch ~ 2 ~ ~ 2 ~ ch - CH - CH ~ ~ 2 ~ ~ 2 ~ 3 ~ and CH - CH (CH ~ 3 ~) - CH ~ 3 ~, through the oxidation of 2,2,6,6 - tetrametilpiperidinas 4 - substituted u00a2i! With the aid of hydrogen peroxide in the presence of alkali metal carbonate and / or ammonium and possibly in the presence of a solvent.In which the reaction is carried out with the addition of bru00f7nstedt acids, which have a power greater than that of the carbonate acid employed.