Continuous flow Meerwein–Ponndorf–Verley reduction of HMF and furfural using basic zirconium carbonate
- Henrique Magri Marçona
- Julio Cezar Pastrea
- aInstitute of Chemistry, University of Campinas – UNICAMP, PO Box 6154, Zip Code 13083-970, Campinas, SP, Brazil
Read the publication that featured this abstractContinuous Flow Microreactors and Green Chemistry are areas with promising applications, especially when allied. In this scenario, the main goal of this study was to develop new strategies for the synthesis of bio-based compounds under a flow regime. We worked towards the flow synthesis of furfuryl alcohol and DHMF (dihydroxymethylfuran), from their respective aldehydes, through a Meerwein–Ponndorf–Verley reaction with iso-propanol catalysed by basic zirconium carbonate. Furfuryl alcohol was prepared in essentially quantitative yield with productivities as high as 67 mg min−1. Efforts towards DHMF synthesis were performed and the process was also optimized using design of experiments. The optimal conditions were defined for DHMF at 0.25 M and were determined to be 120 °C and 50 s of residence time, giving yields of up to 99% and productivity of 50 mg min−1. The use of a FT-IR device for the in-line continuous monitoring was pivotal for the fast optimization of the processes, securing steady-state operations, and design of experiments ensured a greater understanding of the effect of temperature, residence time and concentration, alongside their interactions in yield, selectivity and productivity.
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