The L-proline modified Zr-based MOF (Basu-proline) catalyst for the one‐pot synthesis of dihydropyrano[3,2-c]chromenes

Abstract

A novel, reusable, and efficient L-proline-modified Zr-based metal–organic framework (Basu-proline) was designed, synthesized, and characterized by Fourier Transform-Infrared spectroscopy (FT-IR), Energy-Dispersive X-ray spectroscopy (EDX), elemental mapping, Field Emission Scanning Electron Microscopy (FE-SEM), X-ray Diffraction analysis (XRD), Thermo-Gravimetric-Differential Thermal Analysis (TGA-DTA), and N2 adsorption–desorption isotherms. Then, its catalytic performance was assessed in the synthesis of dihydropyrano[3,2-c]chromenes via the one-pot, three‐component tandem condensation reaction of 4-hydroxycoumarin, aromatic aldehydes and malononitrile. The Basu-proline catalyst exhibited a better efficiency than some reported protocols regarding higher yields, lower reaction times, and simple separation.

A novel magnetic FSM-16 supported ionic liquid/Pd complex as a high performance and recyclable catalyst for the synthesis of pyrano[3,2-c]chromenes

“…Due to the these limitations, the development of efficient, simple, and environmentally benign processes for the synthesis of pyran derivatives remains a critical objective aligned with green chemistry principles. 14,15 The design and development of novel catalysts with excellent activity, selectivity, and resistance to deactivation is one of the primary objectives of research scientists in the long term. Catalysts can typically be classied into two main categories: homogeneous and heterogeneous catalysts.…”

Bifunctionalised acid-base hierarchically structured monolithic micro-/mesoreactors for continuous-flow tandem catalytic processes. A case study of cyanocinnamate synthesis

“…Various catalysts have been obtained using nanoparticles, powdered porous supports with well-de ned pore structure, i.e. SBA-15, MCM-41, MOFs, zeolites and polymers [6][7][8][9][10][11][12][13][14]. The tandem reactions usually involve at least two different catalytically active species, and often with antagonistic properties.…”