Peg-SO₃H as an Efficient and Reusable Biodegrable Polymeric Catalyst for the Synthesis of Amidoalkyl Naphthols

摘要

An efficient and convenient procedure for the synthesis of amidoalkyl naphthols by the condensation reaction between 2-naphthol, aldehydes, and an amide in the presence of a catalytic amount of sulfonated polyethylene glycol (PEG–SO3H) as a highly stable and reusable eco-friendly polymeric catalyst under solvent-free conditions is described. This sulfonated polymer catalyst exhibited excellent catalytic activity and produced the expected product in good yield. Isolation of product from the reaction mixture was simple and neat. So the catalyst is very useful for the industrial purpose for the preparation of amidoalkyl naphthols because of its reusability nature.