Study on Oxidative Condensation of Toluene and Hydrazine/Aniline Catalyzed by Copper Complex Immobilized on Functionalized Graphene Oxide

Abstract

The graphene oxide–imidazolium ionic liquid–CO2H–Cu (GO-IL-CO2H-Cu) catalyst has been successfully synthesized in the present research, and its catalytic activity was studied in a direct oxidative condensation reaction. Also graphene oxide–imidazolium ionic liquid–Cu (GO-IL-Cu), MCM-41–imidazolium ionic liquid–Cu (MCM-41-IL-Cu), MCM-41–imidazolium ionic liquid–CO2H–Cu (MCM-41-IL-CO2H-Cu), chitosan–imidazolium ionic liquid–CO2H–Cu (Chit-IL-CO2H-Cu), and graphitic carbon nitride–imidazolium ionic liquid–CO2H–Cu (g-C3N4-IL-CO2H-Cu) solid substrates were synthesized and used in the oxidative condensation reaction. Obtained results indicated that GO-IL-CO2H-Cu has higher catalytic activity than the other substrates and could be used more than five times without noticeable loss of its catalytic activity. The chemical structure and morphology of synthesized GO-IL-CO2H-Cu were characterized by Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA).

Selective Oxidative Methyl C–H Functionalization of Butylated Hydroxytoluene toward Arylimines/N-Heterocycles

“…Additionally, heteroaryl and polyaryl amines, exemplified by 3-aminopyridine ( 3m ), 5-aminoquinoline ( 3n ), and 1-naphthylamine ( 3o ), were also viable substrates for this protocol, providing the corresponding products in 90, 95, and 92% yields, respectively. Notably, methods for the synthesis of imines through direct methyl activation are rare . In contrast, the features of the protocol, including its metal-free conditions, ease of operation, use of commercially available reagents, and compatibility with a wide range of substituted anilines, highlight its high practicality and generality.…”

Investigation of the carbon dioxide adsorption behavior and the heterogeneous catalytic efficiency of a novel Ni-MOF with nitrogen-rich channels

“…At rst, according to reported articles [30][31][32] the polar solvents, e.g., H 2 O, EtOH, and CH 3 CN were selected as the reaction solvents at room temperature, but no product was achieved. In the next step, it was decided not to use any solvent that can be used at a higher temperature without the requirement of a reux condenser.…”

Graphitic Carbon Nitride Nanosheet/FeWO4 Nanoparticle Composite for Tandem Photooxidation/Knoevenagel Condensation

“…In continuation of our previous research interests in designing heterogeneous catalysts and photocatalysts, − we have developed a simple hydrothermal procedure to prepare a Z-scheme heterojunction g-C 3 N 4 /FeWO 4 nanocomposite for the tandem one-pot photooxidation/Knoevenagel condensation of alcohols with malononitrile (Scheme A,B). The appropriate CB and VB levels of the graphitic carbon nitride (g-C 3 N 4 ) and iron tungstate (FeWO 4 ) lead to spatial separation and prolonging the lifetime of the photogenerated electron–hole pairs.…”