Nanomagnetic Macrocyclic Schiff-base-Mn(ii) Complex: an Efficient Heterogeneous Catalyst for Click Approach Synthesis of Novel β-substitued-1,2,3-triazoles
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In the present work, a novel symmetrical 15-membered macrocyclic Schiff base complex of manganese was prepared using the reaction of the synthetic 2,6-diacetylpyridine functionalized FeO MNPs with 2,2-(piperazine-1,4-diyl)dianiline and Mn(ii) bromide salt a template approach. The resulting [FeO@PAM-Schiff-base-Mn][ClO] heterogenized complex was characterized using FT-IR, XRD, BET, TGA, EDX, Xray-mapping, SEM, TEM and VSM analysis. To demonstrate proof of concept, Huisgen 1,3-dipolar cycloaddition synthesis of 1,2,3-triazoles was selected to evaluate the activity and reusability of the catalyst. The ethanol as a green solvent proved to be an excellent reaction medium for this synthesis. Yields of up to 100% were obtained in some cases. Significantly, as demonstrated, [FeO@PAM-Schiff-base-Mn][ClO] catalyst was recycled for 8 cycles without losing catalytic activity under the optimized reaction conditions. The hot filtration and ICP-OES tests ratified that there was no leaching of metal during the catalytic reaction, indicating the heterogeneous manner of the catalyst.
Ajormal F, Bikas R, Ghasemzadeh H, Noshiranzadeh N, Kozakiewicz-Piekarz A RSC Adv. 2024; 14(43):31320-31331.
PMID: 39359334 PMC: 11443811. DOI: 10.1039/d4ra05626d.
Metal Complexes with Schiff Bases: Data Collection and Recent Studies on Biological Activities.
Sinicropi M, Ceramella J, Iacopetta D, Catalano A, Mariconda A, Rosano C Int J Mol Sci. 2022; 23(23).
PMID: 36499170 PMC: 9739361. DOI: 10.3390/ijms232314840.