Green synthesis of 2-amino-7-hydroxy-4-aryl-4$H$-chromene-3-carbonitriles using ZnO nanoparticles prepared with mulberry leaf extract and ZnCl$_{2}$

Abstract

Abstract:A highly efficient and environmentally benign protocol for the synthesis of 2-amino-7-hydroxy-4-aryl-4 Hchromene-3-carbonitrile derivatives in good to high yields (77%-97%) by one-pot three-component coupling reaction of aromatic aldehydes, malononitrile, and resorcinol under reflux condition was developed in aqueous media using ZnO nanoparticles that were prepared in the presence of mulberry leaf extract under mild conditions.

Fe3O4@NCs/BF0.2: A magnetic bio‐based nanocatalyst for the synthesis of 2,3‐dihydro‐1H‐perimidines

“…The proposed mechanism for the synthesis of 2-phenyl-2,-3-dihydro-1H-perimidine in the presence of Fe 3 [22] 2 NSSA a (2 mg) r.t. EtOH 50 min 84 [7] 3 Cu(NO 3 ) 2 .6H 2 O (5 mol%) r.t. EtOH 10 min 83 [6] 4 CuY zeolite (0.002 g) r.t. EtOH 25 min 81 [9] 5 FePO 4 (0.01 g) r.t. EtOH 12 hr 80 [5] 6…”

One-pot synthesis of substituted 4 H -chromenes by nickel ferrite nanoparticles as an efficient and magnetically reusable catalyst

“…4,5 These types of reactions in the presence of magnetic nanoparticles (MNPs) have many advantages such as high yield, short reaction times, low cost, selectivity, clean reaction profiles, and ecofriendly and environmentally benign conditions in comparison to the various strategies of the classical chemistry. 6−8 MNPs, and especially different ferrite MNPs with interesting properties as recoverable and reusable catalysts, are widely used in a variety of MCRs.…”