Efficient synthesis of benzo[a] pyrano[3,2-c] phenazine in solvent-free conditions using butyl-3-methylimidazolium hexafluorophosphate ionic liquid catalyst

Subject Areas : Polymers and Organic Structures

Hossein Naeimi ¹ , Mahsa Khorasani ²

1 - Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
2 - Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran

Received: 2023-06-08 Accepted : 2023-06-24 Published : 2023-05-22

Keywords: 4-dione, Ionic liquid, Butyl-3-methylimidazolium hexafluorophosphate, Benzene-1, 2-diamine, 2-hydroxynaphthalene-1,

Abstract :

In this research, the condensation of 2-hydroxynaphthalene-1,4-dione, malononitrile, aromatic aldehydes, and ortho-phenylenediamine was carried out for green synthesis of benzo[a]pyrano[3,2-c]phenazine under solvent-free conditions. This reaction was catalyzed using ionic liquid, butyl-3-methylimidazolium hexafluorophosphate as a base catalyst with simple reaction condition and easy separation of products. The products were obtained in high to excellent yields and reaction time between 15 to 25 minutes. All products were identified by melting point, FT-IR and 1H NMR techniques.

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