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A wide variety of secondary amines are chemoselectively subjected to N-nitrosation reaction with treatment of citric acid and NaNO_2 in the presence of wet SiO_2(50%,w/w) in dichloromethane at room temperatture under heterogeneous conditions.The Nnitrosation method is very simple and products can be easily isolated with good to high yields.
A wide variety of secondary amines are chemoselectively subjected to N-nitrosation reaction with treatment of citric acid and NaNO_2 in the presence of wet SiO 2 (50%, w / w) in dichloromethane at room temperature under heterogeneous conditions. The Nnitrosation method is very simple and products can be easily isolated with good to high yields.