Preparation and characterization of new inorganic–organic hybrid catalyst H₃PMo₁₂O₄₀/Hyd‐SBA‐15 and its application in the domino multi‐component reaction

Abstract

We present novel inorganic-organic hybrid catalyst to accomplish domino multi-component reaction (MCR) for synthesis of 3-amino-2′-oxospiro[benzoThis methodology offers remarkable development by easy production of H 3 PMo 12 O 40 /Hyd-SBA-15 in regard to solving the problem of using harsh catalysts, also it demonstrates to be impressive and environmentally friendly in term of low reaction times and high yields.

Recent Advances in the Synthesis of 2-Hydroxy-1,4-naphthoquinone (Lawsone) Derivatives

“…environmentally friendly due to its low reaction times and high product yields. 48 Scheme This was achieved through a sequential one-pot, two-step, pseudo-five-component tandem reaction using 2hydroxynaphthalene-1,4-dione 1, o-phenylenediamine 22, and aromatic aldehydes 68a-h. The reaction took place under solvent-free conditions at 90 °C, with the presence of 2aminopyridine as a co-catalyst and p-TsOH as a catalyst (Scheme 20).…”

CoFe2O4@SiO2‐PA‐CC‐guanidine nanoparticles: A novel, efficient, and recyclable catalyst for the synthesis of 3,5‐disubstituted‐2,6‐dicyanoaniline derivatives

“…Nanoparticles are heterogeneous catalysts. [33] Because the activity of heterogeneous catalysts is lower than that of homogeneous catalysts, [34] nanoparticles not only have activity similar to the homogeneous catalysts but can also be easily separated from the reaction mixture. Nanoparticles such as Fe 3 O 4 and CoFe 2 O 4 [35][36][37][38] have magnetic property and thus can be simply separated from the reaction mixture using an external magnet without need for complex methods such as filtration or centrifugation and can be recovered and reused.…”

“…Nowadays, the use of nanoparticles as the catalyst for the synthesis of organic compounds has increased. Nanoparticles are heterogeneous catalysts . Because the activity of heterogeneous catalysts is lower than that of homogeneous catalysts, nanoparticles not only have activity similar to the homogeneous catalysts but can also be easily separated from the reaction mixture.…”