Synthesis of 1H‐Isochromenes, 4H‐Chromenes and Orthoaminocarbonitrile Tetrahydronaphthalenes by CaMgFe₂O₄ Base Nanocatalyst

Abstract

Designing protocols for the preparation of nanocatalyst in order to increase the yield of an organic reaction is a challenging task in modern chemistry. CaMgFe2O4 is a base nanocatalyst that prepared through sol‐gel method. This nanocatalyst has used for the synthesis of 1H‐isocromenes, 4H‐chromenes and ortho‐aminocarbonitrile tetrahydronaphthalenes through the multi‐component reactions. The starting materials for all of the reactions are cyclohexanone, benzaldehyde and malononitrile and the reaction followed with Michael addition and cyclization. Therefore, the different multicomponent reactions from the same materials arranged by using CaMgFe2O4 base nanocatalyst. The catalyst identified with XRD, EDX, SEM, VSM and XPS techniques and the organic compounds recognized with melting point, FT‐IR, 1H NMR and 13C NMR analyses.

Functionalized NiFe2O4/mesopore silica anchored to guanidine nanocomposite as a catalyst for synthesis of 4H-chromenes under ultrasonic irradiation

“…The NiFe 2 O 4 nanoparticles were synthesized and functionalized by mesopore silica and guanidine. At first, NiFe 2 O 4 was provided by the sol-gel method [48]. The obtained NiFe 2 O 4 was reacted by CTAB, NaOH, and TEOS at ambient temperature to NiFe 2 O 4 @ mesopore silica.…”

Design and preparation of hollow triple-shell CaMgFe2O4 nanospheres for green synthesis of spiro-dihydrofurans under solvent free conditions

“…Nano-sized MgFe 2 O 4 , CaFe 2 O 4 and CaMgFe 2 O 4 , possessing spinel structures, have attracted much attention due to their chemical and thermal stability and unrivaled structural, optical, magnetic, electrical and dielectric properties. [3][4][5] The preparation methods of spinel ferrites include using a host template, 6 co-precipitation 7 and hydrothermal treatment. 8 Hollow structures, as a class of organic/inorganic material, attract much attention in both fundamental and applied research.…”

Preparation and characterization of doped hollow carbon spherical nanostructures with nickel and cobalt metals and their catalysis for the green synthesis of pyridopyrimidines

“…Sometimes, depending on the metals used and on the studied reaction, the catalytic activity of the bimetallic catalyst is more potent than the total activity of the respective single metallic catalysts. 24,25 However, not all bimetallic catalysts exhibit a synergic effect.…”