Water Tolerant and Reusable Sulfonated Hyperbranched Poly(aryleneoxindole) Acid Catalyst for Solvent‐Free Esterification. Issue 30 (25th October 2017)

• Record Type: Journal Article
• Authors: Verheyen, Thomas; Smet, Mario; De Borggraeve, Wim M.
• Is Part Of: ChemistrySelect. Volume 2:Issue 30(2017)
• Page Start: 9822
• Page End: 9828
• Publication Date: 2017-10-25
• Subjects: Esterification -- Hyperbranched Poly(aryleneoxindole) -- Solvent-Free -- Supported Catalyst -- Water Tolerant; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201701636
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The synthesis of esters directly from alcohols and carboxylic acids plays an important role in organic synthesis because of its utility in diverse fields both in academia and in industry. Innovations to further improve the efficiency and sustainability of the esterification process are highly desirable. To accomplish a green esterification protocol, we used a recoverable sulfonated hyperbranched poly(aryleneoxindole) acid catalyst in the condensation of various alcohols with acids. The protocol allows high conversion with equimolar amounts of reagents, recovery and reuse up to at least five times with solvent free conditions thus simplifying purification steps and reducing redundancy. Furthermore the reaction medium was deliberately spiked with water to evaluate its influence on the activity of the acid catalyst and excellent tolerance was observed. Abstract : Esterification plays an important role in organic synthesis because of its utility in diverse fields both in academia and in industry. A green esterification protocol is designed allowing high conversion with equimolar amounts of reagents, with a reusable sulfonated hyperbranched poly(aryleneoxindole) acid catalyst, under solvent free conditions and water tolerant.