A wide variety of secondary amines are chemoselectively subjected to N-nitrosation reaction with treatment of citric acid and NaNO2 in the presence of wet SiO2 (50%, w/w) in dichloromethane at room temperatture under heterogeneous conditions. The N-nitrosation method is very simple and products can be easily isolated with good to high yields. (C) 2008 Arash Ghorbani-Choghamarani. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
