Reaction of N-nitro-O-(4-nitrophenyl)hydroxylamine with phosphorus pentoxide in the presence of nitriles. New method for the generation of aryloxenium ion
作者:M. S. Klenov、A. M. Churakov、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1007/s11172-011-0374-6
日期:2011.11
A reaction of N-nitro-O-(4-nitrophenyl)hydroxylamine with nitriles RCN (R = Me, Et, Ph) in the presence of P4O10 in excess amount at 0 °C leads to the formation of 2-R-5-nitro-1,3-benzoxazoles. The reaction presumably takes place through the intermediate (phenoxy)oxodiazonium ion [NO2C6H4O-N=N=O]+, which eliminates an N2O molecule to form the aryloxenium ion [NO2C6H4O]+. The latter reacts with nitriles