Title of article :
Ultrasound promoted regioselective nitration of phenols using dilute nitric acid in the presence of phase transfer catalyst
Author/Authors :
Nandurkar، نويسنده , , Nitin S. and Bhanushali، نويسنده , , Mayur J. and Jagtap، نويسنده , , Sachin R. and Bhanage، نويسنده , , Bhalchandra M.، نويسنده ,
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.
Keywords :
phenol , phase transfer catalysts , regioselectivity , Nitration , Ultrasound
Journal title :
Astroparticle Physics
