Lactic acid-catalyzed Eco-friendly Cyclization Reaction for the Synthesis of 4H-benzo[b]pyrans and 3,4-dihydropyrano[c]chromenes in EtOH/H2O as an Efficient Green Reaction Medium

Subject Areas : Polymer

Nourallah Hazeri ¹ , Mojtaba Lashkari ² , Homayoun Faroughi Niya ³ , Hamed Pourbalouch ⁴

1 - Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran.
2 - Faculty of Sciences, Velayat University, Iranshahr, Iran.
3 - Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran
4 - Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran

Received: 2020-05-27 Accepted : 2020-05-27 Published : 2020-07-01

Keywords: lactic acid, Multi-component reactions (MCRs), 3, green chemistry, 4H-benzo[b]pyran, 4-dihydropyrano[c] chromene,