Betti you can: An efficient, sustainable, and a catalyst‐free procedure for the synthesis of Betti bases by a one‐pot, three‐component, Mannich‐type condensation of secondary amines, aldehydes, and β‐naphthol in polyethylene glycol at room temperature has been developed. The products do not require purification by chromatography and the solvent was remarkably recyclable for up to four runs.
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