Nitric Acid (HNO3)
Nitric acid reacts violently with many organic substances. Acid concentration and temperature are important parameters allowing the control of the oxidation reactions.
A chemoselective and efficient procedure allows the conversion of benzylic and allylic alcohols into the corresponding carbonyl compounds with sodium nitrate as oxidant in the presence of 3-methylimidazolinium hydrogensulfate.
A. R. Hajipour, F. Rafiee, A. E. Ruoho, Synlett, 2007, 1118-1119.
A mixture of nitrate salt and chlorotrimethylsilane is a mild and efficient reagent for the direct oxidative chlorination of thiols and disulfides to the corresponding sulfonyl chlorides in excellent yields. Sulfides and sulfoxides were also found to undergo oxidation to sulfones. In most cases these reactions are highly selective, simple, and clean, affording products in high yield and purity.
G. K. S. Prakash, T. Mathew, C. Panja, G. A. Olah, J. Org. Chem., 2007, 72, 5847-5850.