A combination of cross-linked poly(4-vinylpridininium) chloride [P 4 -H] Cl, [II], and sodium nitrite or quaternized cross-linked poly(N-methyl-4-vinylpyridinum) nitrite [P 4 -Me] NO2, [IV], was used as effective nitrosating agents for the N-nitrosation of secondary amines under solvent-free conditions in high yields. The spent polymeric reagents can usually be removed quantitatively and regenerated.

Nitro compounds Q 0100Nitration of Aromatic Compounds on Silica Sulfuric Acid. -A new system is used for the nitration of aromatic compounds, e.g. (I). Highly pure nitro derivatives are obtained by simple extraction and subsequent evaporation of the solvent. -(ZOLFIGOL*, M. A.; MIRJALILI, B. F.; BAMONIRI, A.; ZARCHI, M. A. K.; ZAREI, A.; KHAZDOOZ, L.; NOEI, J.; Bull. Korean Chem.

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A combination of crosslinked poly(4-vinylpyridinium)chloride [P 4 -H]Cl (I) and sodium nitrite or quaternized crosslinked poly(N-methyl-4-vinylpyridinium)nitrite [P 4 -Me]NO 2 (II) was used as effective nitrosating agents for the N-nitrosation of secondary amines under mild and heterogeneous conditions in moderate to excellent yields.The spent polymeric reagents can usually be removed quantitatively and regenerated.