@article{Hajipour_Sheikhan_Alaei_Zarei_2024, title={Brønsted acidic ionic liquid as the efficient and reusable catalyst for synthesis of coumarins via Pechmann condensation under solvent-free conditions}, volume={5}, url={https://oiccpress.com/iranian-journal-of-catalysis/article/bronsted-acidic-ionic-liquid-as-the-efficient-and-reusable-catalyst-for-synthesis-of-coumarins-via-pechmann-condensation-under-solvent-free-conditions/}, abstractNote={A mild and efficient method has been developed for the preparation of substituted coumarins from reaction of various phenols with different β-ketoesters via Pechmann condensation in the presence of Brønsted acidic ionic liquid (N-(4-sulfonic acid) butyl triethylammonium hydrogen sulfate) as an effective catalyst under solvent-free conditions. Different phenols reacted with ethyl acetoacetate to produce the corresponding substituted coumarins in high to excellent yields and short reaction times. Moreover, [TEBSA][HSO4] has been used as an effective green catalyst for the synthesis of coumarin derivatives under solvent-free conditions. Using the relatively non-toxic (halogen-free) and reusable Brønsted acidic ionic liquid, high catalytic efficiency, high yields, short reaction times and straightforward work-up are advantages of this protocol.}, number={3}, journal={Iranian Journal of Catalysis}, publisher={OICC Press}, author={Hajipour, Abdol Reza and Sheikhan, Nafisehsadat and Alaei, Mohammad Ali and Zarei, Amin}, year={2024}, month={Feb.}, keywords={Bronsted acidic ionic liquid, Coumarins, β-ketoesters, N-(4-sulfonic acid) butyl triethylammonium hydrogen sulfate ([TEBSA][HSO4])} }