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Abstract
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At the beginning of our century, Abbott’s group published a few papers that triggered research in the area we call today Deep Eutectic Solvents (DES) [1]. An alternative family of ionic liquids (IL), DES, is rapidly emerging. DES is a fluid generally composed of ionic compounds hydrogen-bond acceptors (HBA) and hydrogen-bond donors (HBD) (often cheap and derived from safe components) that are capable of self-association to form a eutectic mixture. Two salts with high melting points are mixed and form at eutectic with a melting point lower than that of each component [2].In this project, a cheap, simple, and non-toxic method was considered for the synthesis of benzo [a]pyrano[2,3‐ c] phenazines derivatives. the structure and properties of the DES catalyst were investigated by FT-IR, TGA/DTA, DSC, Density, eutectic point, and 1HNMR. Advantages provided by this study include reaction in solvent-free conditions (reduction of contamination), short reaction time, high productivity, easy recycling and separation of the catalyst, as well as high selectivity
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