The Nitration and Sulfonation of 2,4,6-Triphenyl-1,3,5-triazine

The nitration of cyaphenine (2,4,6-triphenyl-1,3,5-triazine) with a mixture of nitric and sulfuric acids has been found to give products with mostly meta- and partly para-substituted benzene rings. The composition of products varies with the varying reaction conditions. m,m′-Dinitrocyaphenine is the product of the highest number of nitro groups. The sulfonation of cyaphenine with oleum gives trisulfonated cyaphenine at meta-positions of benzene rings; it suffers desulfonation when left standing in the reaction mixture for a long time.