Ultrasound promoted regioselective nitration of phenols using dilute nitric acid in the presence of phase transfer catalyst |
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| Authors: | Nandurkar Nitin S Bhanushali Mayur J Jagtap Sachin R Bhanage Bhalchandra M |
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| Affiliation: | Department of Chemistry, Institute of Chemical Technology, Mumbai University, N. Parekh Marg, Matunga, Mumbai 400 019, India. |
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| Abstract: | ![]()
Phenols are selectively nitrated to o-nitrophenol along with rate enhancement using dilute nitric acid (6 wt%)/tetra butyl ammonium bromide (TBAB) under sonication. The selectivity can also be reversed to p-nitrophenol using NaBr as a catalyst. Kinetic analysis of nitration of phenol both with and without sonication has been investigated by variation of reaction parameters such as catalyst, nitric acid and substrate concentration. |
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