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Among bio\u2010based polymers, furan\u2010derived PEs such as poly(ethylene furanoate) (PEF) have garnered significant attention. The synthesis of PEF, as well as other similar 2,5\u2010furandicarboxylic acid (FDCA)\u2010based polymers, is mainly based on bulk polycondensation (PC) that in general requires elevated temperatures and low pressure, making the process energy\u2010intensive and vulnerable to thermo\u2010oxidative degradation. In this view, entropically driven ring opening polymerization (ED\u2010ROP) might represent an interesting potential alternative since it requires milder conditions and is intrinsically more atom economic. From these premises, this work focuses on developing an alternative synthetic strategy to bio\u2010based PEs through ED\u2010ROP of macrocycles derived from FDCA dimethyl ester (FDME). These macrocycles were prepared by reacting FDME with diols via pseudo\u2010high dilution condensation (PHDC) using dibutyltin(IV) oxide as a catalyst and cyclopentyl methyl ether as a recyclable green solvent. Isolation of the pure macrocycles is achieved by simple crystallization from the reaction mixture. Subsequent ROP of pure macrocycles is investigated as a viable route to prepare the related PEs in mild reaction conditions.<\/jats:p>","DOI":"10.1002\/ejoc.202500737","type":"journal-article","created":{"date-parts":[[2025,10,14]],"date-time":"2025-10-14T04:42:33Z","timestamp":1760416953000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Greener Approach to 2,5\u2010Furandicarboxylate Macrocycles and their Entropically Driven Ring Opening Polymerization"],"prefix":"10.1002","volume":"28","author":[{"given":"Chaimaa","family":"Sadraoui","sequence":"first","affiliation":[{"name":"Department of Environmental Sciences Informatics and Statistics Ca\u2019 Foscari University of Venice  Scientific Campus Via Torino 155 Venezia Mestre 30170 Italy"}]},{"given":"Giacomo","family":"Trapasso","sequence":"additional","affiliation":[{"name":"Department of Environmental Sciences Informatics and Statistics Ca\u2019 Foscari University of Venice  Scientific Campus Via Torino 155 Venezia Mestre 30170 Italy"}]},{"given":"Feriel","family":"Abid","sequence":"additional","affiliation":[{"name":"CICECO \u2013 Aveiro Institute of Materials Department of Chemistry University of Aveiro  Aveiro 3810\u2010193 Portugal"}]},{"given":"Paula S. 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