CuO Nanoparticles as an Efficient Catalyst for the Synthesis of Flavanones

Non-Covalent Supported of l-Proline on Graphene Oxide/Fe3O4 Nanocomposite: A Novel, Highly Efficient and Superparamagnetically Separable Catalyst for the Synthesis of Bis-Pyrazole Derivatives

“…Therefore, the most prominent problem, which is the tendency of nanoparticles to agglomerate due to their high surface energy, can be avoided [ 13 ]. For example, various organic materials, such as dendrimers [ 14 ], polymers brushes [ 15 ], graphene sheets [ 16 ], as well as inorganic materials [ 17 , 18 , 19 , 20 , 21 ], have been utilized as carriers for the immobilization of metal NPs.…”

Zirconium Oxide Nanoparticles as an Efficient Catalyst for Three-Component Synthesis of Pyrazolo[1,2-A][1,2,4]Triazole-1,3-Diones Derivatives

“…( Table 2) and their spectral properties with literature data. [15][16][17] Although it is not clear how ZrO 2 acts as a catalyst for the reaction, on the basis of the surface of metal oxides exhibit both Lewis acid and Lewis base character 18,19 and according to the literature survey [15][16][17] , the suggested mechanism for the formation of the products is shown in Figure 1. The catalyst was recovered after each run, washed with ethanol, dried in an oven at 100 o C for 15 min.…”

A review of the syntheses of flavanones, thioflavanones, and azaflavanones from 2'‐substituted chalcones

“…These intermediates then undergo intramolecular cyclization to yield flavanones (33) (Scheme 15). 36 Recently, it was reported that a Pd(TFA) 2 catalyst provided flavanones from 2'-hydroxydihydrochalcones via oxidative cyclization involving dehydrogenation. Treatment of 2'-hydroxydihydrochalcones (34) with 10 mol% Pd(TFA) 2 in the presence of Cu(OAc) 2 as an oxidant in DMSO caused dehydrogenation to form intermediates (M), which underwent elimination of β-hydride to give 2'hydroxychalcones (35).…”