Efficient Preparation of Alkyl Benzoates by Heteropolyacid‐Catalysed Esterification of Benzoic Acid under Solvent‐Free Condition. Issue 31 (19th August 2019)

• Record Type: Journal Article
• Authors: Tiwari, Ritesh; Rahman, Anoosha; Bhat, Navya Subray; Onkarappa, Sharath Bandibairanahalli; Mal, Sib Sankar; Dutta, Saikat
• Is Part Of: ChemistrySelect. Volume 4:Issue 31(2019)
• Page Start: 9119
• Page End: 9123
• Publication Date: 2019-08-19
• Subjects: alkyl benzoate -- benzoic acid -- catalysis -- esterification -- heteropolyacid; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201902208
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: 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. Abstract : 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.