Carbon Nitride‐Supported Silver Nanoparticles: Microwave‐ Assisted Synthesis of Propargylamine and Oxidative C‐C Coupling Reaction

Abstract

In the present study we have, synthesized silver nanoparticles supported on carbon nitride AgNPs@g‐C3N4 and investigated its catalytic aspects by using microwave. We found that silver nanoparticles supported on g‐C3N4 were highly active in the A3‐coupling reaction of (Aldehyde, secondary amine and terminal alkynes) for the synthesis of propargylamines with excellent yield up to 97% and in C−C coupling reaction of terminal alkynes for the synthesis of 1, 3‐diyne with excellent yield up to 98%. We have achieved excellent TON (72932), TOF (3636 min−1), E‐factor (0.27) and atom economy AE (94%). Reaction parameters like effect of catalyst quantity, effect of time and effect of temperature was deeply studied. The catalyst was characterized by SEM, HR‐TEM, EDX, XRD, ICP‐AES and IR.

In Situ Immobilized Silver Nanoparticles on Rubia tinctorum Extract-Coated Ultrasmall Iron Oxide Nanoparticles: An Efficient Nanocatalyst with Magnetic Recyclability for Synthesis of Propargylamines by A3 Coupling Reaction

“…In the next step, the crude product was purified using a silica gel column chromatography (70:30, hexane/EtOAc). All compounds were identified and characterized using spectral analysis or melting points. − …”

A walk around the application of nanocatalysts for cross-dehydrogenative coupling of C–H bonds

“…53 Without slight doubt, the most straightforward approach to the synthesis of symmetrical 1,3-diynes is the oxidative homo-coupling of two terminal alkynes, which known as the Glaser coupling. 54 Although numerous efficient metal nanocatalysts have been reported for this interesting and useful reaction (Table 4), [55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70] the nanometal-catalyzed hetero-coupling reactions between two different alkynes were less developed. Noteworthy, due to the competitive reaction pathways between homo-coupling and hetero-coupling reactions, synthesis of unsymmetrical 1,3-diynes is more difficult compared to the symmetrical ones.…”

High‐efficiency catalyst for copper nanoparticles attached to porous nitrogen‐doped carbon materials: Applied to the coupling reaction of alkyne groups under mild conditions

“…[ 14 ] A type of high‐surface‐area polyporous and coral‐like carbon materials was synthesized from acetone [ 15 ] and applied to synthetic 1,4‐diphenylbutadiyne under mild reaction conditions. [ 16 ] Optimal reaction conditions were obtained by analyzing the factors, such as alkali, solvent, reaction temperature, and reaction time. Experimental exploration shows the prepared catalyst has a high surface area (656 m 2 g −1 ), and the Cu nanoparticles are uniformly dispersed on the surface of the carrier.…”