PROCESS FOR PREPARING N-METHOXY DERIVATIVES OF 4-HYDROXY-2,2,6,6-TETRAMETHYLPIPERIDINE AND 2,2,6,6,-TETRAMETHYL-4-PIPERIDONE

摘要

IMPROVED PROCESS FOR PREPARING N-METHOXY DERIVATIVES OF 4-HYDROXY-2,2,6,6-TETRAMETHYLPIPERIDINE AND 2,2,6,6-TETRAMETHYL-4-PIPERIDONE 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 thecorresponding N-oxyl hindered amine by combining hydrogen peroxide and a peroxide-decomposing transition metal salt in the presence of dimethyl sulfoxide.