Process for the synthesis of amine ethers from secondary amino oxides

摘要

An amine ether of formula (A) wherein a is 1 or 2; and when a is 1, E is E'; when a is 2, E is L; E' is C₁-C₃₆ alkyl; C₃-C₁₈ alkenyl; C₂-C₁₈ alkinyl; C₅-C₁₈ cycloalkyl; C₅-C₁₈ cycloalkenyl; a radical of a saturated or unsaturated aliphatic bicyclic or tricyclic hydrocarbon of 7 to 12 carbon atoms; C₂-C₇alkyl or C₃-C₇alkenyl substituted by halogen; C₇-C₁₅aralkyl or C₇-C₁₅ aralkyl substituted by C₁-C₄ alkyl or phenyl; or E' is a radical of formula (VII) as explained in claim 1; T' is tertiary C₄-C₁₈alkyl or phenyl, each of which are unsubstituted or substituted by halogen, OH, COOR₂₁ or C(O)-R₂₂; or T' is C₅-C₁₂cycloalkyl; C₅-C₁₂cacloalkyl which is interrupted by at least one O or -NR₁₈-; a polycyclic alkyl radical having 7-18 carbon atoms, or the same radical which is interrupted by at least one O or -NR₁₈-; or T' is -C(G₁)(G₂)-T''; or C₁-C₁₈alkyl or C₅-C₁₂cycloalkyl substituted by F(I)T'' is hydrogen, halogen, NO₂, cyano, or is a monovalent organic radical comprising 1-50 carbon atoms; or T'' and T' together form a divalent organic linking group completing, together with the hindered amine nitrogen atom and the quaternary carbon atom substituted by G₁ and G₂, an optionally substituted five- or six-membered ring structure; and all other residues are as defined in claim 1, are obtained in good yield from the corresponding N-oxyl hindered amine precursor by reaction with a hydrocarbon E₁-H or H-L-H in the presence of an organic hydroperoxide and a catalytic amount of copper or a copper compound. The products of present process find utility as polymerization regulators and/or light stabilizers for organic material