Abstract
Several copper compounds (Cu, Cu 2O, CuO, CuCl and CuCl 2) have been used as catalysts for the oxidation of 2-, 3- and 4-aminophenol with O 2 at 25 °C; a comparison of their activities was made through kinetic determinations. The oxidation of 2-aminophenol selectively produced 2-amino-phenoxazin-3-one ( 1), whereas the oxidation products of 3- and 4-aminophenol were two new compounds, 2-amino-5 [(3-hydroxyphenyl) amino]-2,5-cyclohexadiene-1,4-dione ( 3) and 3-[(4-hydroxyphenyl)amino]-4-[(2-amino-5-hydroxy) phenyl]-6-[(4-hydroxyphenyl)imino]-2,4-cyclohexadien-1-one ( 2).
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