[BMIm]BF4-LiCl: An effective catalytic system for the synthesis of pyrano[3,2-c]chromene and pyrano[4,3-b]pyrone derivatives

Authors

• Esmayeel Abbaspour-Gilandeh ¹
• Seyyedeh Cobra Azimi ²
• Kurosh Rad-Moghadam ³
• Aidin Mohammadi-Barkchai ⁴

1. Young Researchers and Elites Club, Ardabil Branch, Islamic Azad University, Ardabil, Iran.
2. Young Researchers and Elites Club, Rasht Branch, Islamic Azad University, Rasht, Iran.
3. Chemistry Department, University of Guilan, P.O. Box 41335-19141, Rasht, Iran.
4. Department of Applied Chemistry, Ardabil Branch, Islamic Azad University, Ardabil, 56157, I.R. Iran.

Abstract

An efficient and green method for the synthesis of pyrano[3,2-c]chromene or pyrano[4,3-b]pyrone derivatives is described by using a three-component condensation process of malononitrile, aldehyde, and 4-hydroxycoumarine or 4-hydroxypyrone in [BMIm]BF4-LiCl as an ionic liquid.

Keywords

• Ionic liquid
• Green chemistry
• Multicomponent reaction
• Homogeneous catalyst