title: PEG-embedded KBr(3): A recyclable catalyst for multicomponent coupling reaction for the efficient synthesis of functionalized piperidines.
abstract: PEG-embedded potassium tribromide ([K(+)PEG]Br(3) (-)) was found to be an efficient and recyclable catalyst for the synthesis of functionalized piperidines in high yields in a one step, three component coupling between aldehyde, amine and β-keto ester. At the end of the reaction the [K(+)PEG]Br(3) (-) was readily regenerated from the reaction mixture by treating the residue containing [K(+)PEG]Br(-) with molecular bromine.
authors: Chemical Sciences Division, Indian Institute of Petroleum (Council of Scientific and Industrial Research), Dehradun-248005, India.
authors: Sanny
authors: S
authors: Verma
authors: Suman L
authors: SL
authors: Jain
authors: Bir
authors: B
authors: Sain