One Pot Amidation of Aromatic Aldehydes with Anilines Using Nano Gold as Critical Catalyst

T. Vijayaragini, J. Santhana Lakshmi
Department of Physical chemistry, University of Madras, Guindy campus, Chennai-600025, India

A B S T R A C T
The Aunps synthesized in this work exhibited spherical particles with mean size of 10 ±1nm. One pot batch reactor type reaction incorporated with Aunp and permonosulphate in the reaction between aniline and benzaldehyde resulted in the N-phenyl benzamides, which is the result of oxidative amidation reaction. The kinetics of the reaction was followed by time dependent UV absorbance values. The –I substituents in the aromatic ring of the benzaldehyde and +I effect substituents in the aromatic ring of the aniline, produce good kinetic rate constant and yield values. The two step processes of the oxidative  amidation Schiff’s base formation and subsequent oxidation to amide  in the presence of Aunp becomes a multi component, cost effective and one pot reaction was made possible  with appreciable rate constant and yield values.
Keywords: phenyl benzamides, amidation, benzaldehyde.