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[EN] The selective production of 2-methyltetrahydrofuran from levulinic acid has been effectively conducted using designed Cu based catalysts and compared with a commercial Pd/C system under microwave irradiation. Optimised conditions for the most active catalysts Cu-MINT (>90% conversion, 75% selectivity to MTHF) and Pd/C (78% conversion, 92% selectivity to MTHF) were further translated into a continuous flow process using the proposed catalysts to find out the deactivation of Cu-MINT under flow conditions (79 vs. 13% conversion with a switch in selectivity to products after 30 min in flow), the high stability of Pd/C (73 vs. 70% conversion at stable selectivity under analogous conditions to those of Cu-MINT) but, most importantly, different relevant pathways to valuable products from levulinic acid depending on the type of catalyst employed.The authors thank the Spanish MINECO (Project CTQ2011-28954-C02-01 for\udfinancial support. E.S. acknowledges financial support from JCI 2008–2165. RL\udgratefully acknowledges Ministerio de Ciencia e Innovacion, Gobierno de España for the concession of a Ramon y Cajal contract (RYC-2009-04199). Manuel Ojeda and\udAntonio Pineda are gratefully acknowledged for support during the studies conducted in\udthis work. Jose M. Bermudez acknowledges the support received from the CSIC JAE\udProgram.Peer reviewe

Continuous flow nanocatalysis: reaction pathways in the conversion of levulinic acid to valuable chemicals