E. Yoshida, T. Takata, T. Endo
Dec 1, 1992
Citations
0
Influential Citations
9
Citations
Journal
Macromolecules
Abstract
4-Substituted-2,2,6,6-tetramethylpiperidine-1-oxyl (2) is a stable radical mediating a reversible redox reaction between oxoanunium salt (1) and hydroxylamine (3). The oxidation of polymeric terminal diols with Fe(III) or Cu(II) salts mediated by 2 was carried out to obtain the corresponding polymers containing carbonyl moieties. When 4 equivalent of Cu(NO 3 ) 2 , 1 equiv of Cu(OH) 2 as an acid-trapping agent, and 0.2 equiv of 2 (4-methoxy derivative) were used, a hydrogenated polybutadiene terminal diol was efficiently and selectively oxidized to the aldehyde- or carbonyl-terminated corresponding polymer without any intermolecular reaction