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Efficient Preparation of Alkyl Benzoates by Heteropolyacid‐Catalysed Esterification of Benzoic Acid under Solvent‐Free Condition
Author(s) -
Tiwari Ritesh,
Rahman Anoosha,
Bhat Navya Subray,
Onkarappa Sharath Bandibairanahalli,
Mal Sib Sankar,
Dutta Saikat
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902208
Subject(s) - benzoates , benzoic acid , catalysis , alkyl , phosphotungstic acid , chemistry , reagent , alcohol , organic chemistry , solvent , medicinal chemistry
This 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.