Synthesis and characterization of copper nanoparticles supported on reduced graphene oxide as a highly active and recyclable catalyst for the synthesis of formamides and primary amines

Green synthesis of Pd/Fe 3 O 4 nanoparticles using Euphorbia condylocarpa M. bieb root extract and their catalytic applications as magnetically recoverable and stable recyclable catalysts for the phosphine-free Sonogashira and Suzuki coupling reactions

“…To a stirred solution of 1.0 mmol of aryl halide in 4 mL of DMF, 1.0 mmol of terminal alkyne, 1.5 mmol of piperidine and 0.2 mol% of Pd/Fe 3 O 4 NPs were added and the mixture was heated on an oil bath at 110 °C for M a n u s c r i p t 5 24 h under inert atmosphere (N 2 ). After completion of the reaction (as monitored by TLC), the reaction mixture was cooled to room temperature and the catalyst was separated using a magnetic separator.…”

“…In continuation of our efforts to develop environmentally friendly synthetic methodologies [23][24][25][26][27][28][29], we now wish to report a new and rapid protocol for the preparation of Pd/Fe 3 O 4 NPs by using Euphorbia condylocarpa M. bieb extract ( Figure 1) as a reducing and stabilizing agent and the application of these NPs as novel and stable heterogeneous catalysts in the copper-and phosphine-free Sonogashira and Suzuki coupling reactions. …”

Synthesis, characterization and catalytic activity of graphene oxide/ZnO nanocomposites

“…7 We recently published synthesis of copper nanoparticles supported on reduced graphene oxide as a highly active and recyclable catalyst for the preparation of formamides and primary amines. 8 In continuation of our researches on the synthesis of tetrazoles and application of heterogeneous catalysts, 1,9 we report a new protocol for the preparation of the graphene oxide/ZnO nanocomposite and its catalytic applications as a novel and stable heterogeneous catalyst for the synthesis of 5-substituted-1H-tetrazoles (Scheme 1). Environmental acceptability, economic viability, and recyclability of the graphene oxide/ZnO nanocomposite are the advantages of this novel catalyst.…”

Green synthesis of CuO nanoparticles by aqueous extract of Anthemis nobilis flowers and their catalytic activity for the A3 coupling reaction

“…The flowers are white with a prominent yellow center [25][26][27][28][29]. Due to our ongoing interest on the biosynthesis of metal nanoparticles and heterogeneous catalysts [30][31][32][33][34][35][36][37][38][39][40], we wish to report a simple and effective protocol for preparation of CuO NPs by using Anthemis nobilis flowers extract as a reducing and stabilizing agent. Also, the catalytic activity of CuO NPs for the A 3 coupling reaction was studied.…”