申请人:Ciba-Geigy Corporation
公开号:US05374729A1
公开(公告)日:1994-12-20
N-Methoxy derivatives of the sterically hindered amines 4-hydroxy-2,2,6,6-tetramethylpiperidine and 2,2,6,6-tetramethyl-4-piperidone are prepared from the corresponding N-oxyl hindered amine by combining hydrogen peroxide and a peroxide-decomposing transition metal salt in the presence of dimethyl sulfoxide.
通过在二甲基亚砜存在下,将过氧化氢和过氧化物分解的过渡金属盐与相应的N-氧基受阻胺结合,可以制备受空间位阻影响的胺类4-羟基-2,2,6,6-四甲基哌啶和2,2,6,6-四甲基-4-哌啶酮的N-甲氧基衍生物。