Fe3O4@SiO2@TiO2-OSO3H: an efficient hierarchical nanocatalyst for the organic quinazolines syntheses

Green and eco-friendly mica/Fe3O4as an efficient nanocatalyst for the multicomponent synthesis of 2-amino-4H-chromene derivatives

“…Most of these reported methods have undesirable conditions like long catalyst synthesis processes, rigorous catalyst regeneration and long reaction times. In continuation of our research on introducing new recoverable, efficient and eco-friendly nanocatalysts in organic synthesis [28][29][30][31][32][33][34][35][36][37][38], herein, we report the synthesis and characterization of a mica/Fe 3 O 4 nanocomposite as a heterogeneous catalyst and its application in the effective synthesis of 2-amino-4H-chromenes derivatives 5a-j and 6a-d (Scheme 1). To the best of our knowledge, there is no previously reported work on the catalytic activity investigation of magnetized mica.…”

Synthesis of Quinazoline Derivatives Catalyzed by a New Efficient Reusable Nanomagnetic Catalyst Supported with Functionalized Piperidinium Benzene‐1,3‐Disulfonate Ionic Liquid

“…For this purpose, some routes have been already reported that we review them here. Three‐component reaction catalyzed by polyphosphate ethyl ester (PPE), palladium, TBBDA, copper 1‐methylimidazolium triflouroacetate ([Hmim]TFA), butylmethylimidazolium tetrachloroferrate (bmim[FeCl 4 ]), Fe 3 O 4 /SBA‐15, CoFe 2 O 4 @B 2 O 3 ‐SiO 2 , Fe 3 O 4 @SiO 2 @TiO 2 ‐OSO 3 H, and acetic acid provide the synthesis of various quinazoline and dihydroquinazolinone derivatives. The methods reviewed above have some disadvantages such as long reaction times, by products, low product efficiency and expensive or poisonous catalysts.…”

Sodium gluconate: An efficient organocatalyst for the synthesis of dihydropyrano[2,3-c] pyrazole derivatives

“…The increased attention on the use of novel catalyst and newer techniques via one pot multi component reactions led to the integration of a variety of novelty in their line of investigation [4][5][6][7]. The developments of newer catalyst which are in accordance with the principle of green chemistry are mostly used in one pot synthesis of heterocyclic compounds [8][9].…”