Acid-Catalyzed Reactions of Ortho-Substituted Benzohydroxamic Acids in Polyphosphoric Acid (PPA)

Article abstract of DOI:10.1021/jo00373a022

Ortho-substituted benzohydroxamic acids undergo a variety of reactions when treated with PPA.The nature of substituents on the ring and on the functional group CONHOH plays a key role in influencing the reaction pathways.The difference in behavior may arise due to change in site of protonation depending upon the substitution.However, no clear-cut relationship could be established as attempts to monitor reactions on NMR proved inconclusive.