Tiwari, R.Rahman, A.Bhat, N.S.Onkarappa, S.B.Mal, S.S.Dutta, S.2026-02-052019ChemistrySelect, 2019, 4, 31, pp. 9119-9123https://doi.org/10.1002/slct.201902208https://idr.nitk.ac.in/handle/123456789/24426This study reports a high-yielding, solvent-free, and scalable synthesis of alkyl benzoates from benzoic acid and its derivatives using heteropolyacids (HPA) as efficient and recyclable acid catalysts. The alkyl benzoates were obtained in excellent isolated yields (>85%) within 4 h at 120 °C using 1.5 equivalent of the alcohol reagent and only 0.4 mol% of the phosphotungstic acid (PTA) catalyst. The PTA catalyst was conveniently recovered and reused for three consecutive cycles without significant loss in mass or activity. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheimalkyl benzoatebenzoic acidcatalysisesterificationheteropolyacid