During the diazo-coupling reaction, nucleophilicdisplacement of a nitro group was also observed. This was the main reaction (1→7) when the starting amine bore either a chlorine or methoxy group at the para position (1b–c). The newly prepared compounds (7) might serve as convenient building blocks in synthesis of some heterocycles.
One-Pot Synthesis of Benzotriazoles and Benzotriazole 1-Oxides by Reductive Cyclization of o-Nitrophenylazo Compounds with Benzyl Alcohol
作者:Lajos Novak、Renata Farkas、Mercedes Törincsi、Pal Kolonits、Oscar Jimenez Alonso
DOI:10.3987/com-09-11759
日期:——
Reductive cyclization of 2-[(nitrophenyl)azophenols 1 with benzyl alcohol and sodium hydroxide afforded 2-(2H-benzotriazol-2-yl)phenols 3 and their 1-oxide 2 in good to excellent yields.