Choline peroxydisulfate oxidizing Bio-TSIL: triple role player in the one-pot synthesis of Betti bases and gem-bisamides from aryl alcohols under solvent-free conditions

Abstract

The one-pot, multicomponent solvent-free synthesis of Betti bases (amidoalkyl naphthols) and gem-bisamides directly from alcohol is proposed by an eco-friendly approach using a new environmentally benign, biodegradable, oxidizing, and task-specific ionic liquid (bio-TSIL), namely, choline peroxydisulfate monohydrate (ChPS) 1. Choline bisulphate (ChBS) 2 reduced species is then generated in situ from 1, which catalyses the formation of the desired products in a shorter reaction time with good to excellent yields. This bio-TSIL 1 plays a triple role as an oxidant, catalyst and solvent. It is easily recycled and can be reused five times.