Preparation and characterization of Cu with anthracene-2,3,6,7-tetramine as novel recyclable metal-organic frameworks for the Pechmann reactions to prepare coumarin derivatives under solvent-free conditions

Abstract

Cu with anthracene-2,3,6,7-tetramine ([CuAnTA·2H2O]n) as a recyclable metal-organic framework (MOF) was prepared and used for Pechmann reactions between different substituted phenols and ethyl acetoacetate to obtain coumarin derivatives in good to excellent yields. The prepared catalyst was characterized with various techniques such as FT-IR, XRD, SEM, EDX, BET, BJH and ICP-AES analysis. [CuAnTA·2H2O]n demonstrated good to excellent catalytic efficiency for Pechmann reactions in comparison with to other catalysts. Also, the catalyst is recovered by a simple filtration and reserved its activity even after several cycles.