Copper salt of a DABCO-based molten salt: a high-performance catalyst in the one-pot synthesis of 3,4-dihydropyrimidine and polyhydroquinoline derivatives

Neamatullah Fekrat; Masoumeh Mazloumi; Farhad Shirini

doi:10.1039/d3ra07366a

Copper salt of a DABCO-based molten salt: a high-performance catalyst in the one-pot synthesis of 3,4-dihydropyrimidine and polyhydroquinoline derivatives

RSC Adv. 2023 Dec 6;13(50):35659-35671. doi: 10.1039/d3ra07366a. eCollection 2023 Nov 30.

Authors

Neamatullah Fekrat¹, Masoumeh Mazloumi¹, Farhad Shirini¹

Affiliation

¹ Department of Chemistry, College of Sciences, University of Guilan Rasht 41335-19141 Iran shirini@guilan.ac.ir +98 131 3233262 +981313233262.

Abstract

In this study, [DABCO](SO₃H)₂CuCl₄ as a novel DABCO-based molten salt with dual acidic functionality (Brønsted and Lewis) has been synthesized, characterized and used as a high-performance catalyst in the one-pot synthesis of 3,4-dihydropyrimidine and polyhydroquinoline derivatives. The identification of this catalyst was accomplished by using techniques such as infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermo gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDS) spectroscopy. Excellent efficiency, short reaction times, a simple working method and also use of a recyclable catalyst are the considerable advantages of this process.