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Bis(Oxime Palladacycle) Supported on Magnetized SBA-15 as an Efficient and Retriveble Catalyst for the Mizoroki–Heck Reaction by Fatemeh Ghahramani; Yagoub Mansoori; Abolfazl Bezaatpour; Dolores Esquivel; M. Angeles Navarro is a Materials Science article available to read on EtoBox.

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Herein, we report the anchoring of a bis(oxime palladacycle) adduct on magnetic mesoporous silica (Fe 3 O 4 @SBA-15). Magnetic mesoporous silica was successively treated with (3-aminopropyl) triethoxysilane (APTES), cyanuric chloride (CC), and 4-hydroxyacetophenone oxime-derived palladacycle to give Fe 3 O 4 @SBA-AP-CC-bis(oxime palladacycle). The obtained nano-catalyst was characterized by FT-IR spectroscopy, CP MAS 13 C NMR spectroscopy, scanning electron microscopy (SEM), vibrating sample magnetometry (VSM), Brunauer-Emmett-Teller surface area measurement (S BET ) and X-ray diffraction spectroscopy (XRD). X-Ray photoelectron spectroscopy (XPS) corroborated the (+ 2) oxidation number for palladium. The catalytic potential of Fe 3 O 4 @SBA-AP-CC-bis(oxime palladacycle) was explored in the Mizoroki-Heck reaction. The effects of different reaction conditions, including the solvent, the base, temperature, and palladium content, were studied in detail. The N-methylpyrrolidone (NMP) solvent, 0.5 mol% of the Pd-catalyst, the NaOAc base, and the reaction temperature of 120 °C, provided the best conditions for the Heck cross-coupling reaction. The catalyst showed a wide substrate scope, i

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Author

Fatemeh Ghahramani; Yagoub Mansoori; Abolfazl Bezaatpour; Dolores Esquivel; M. Angeles Navarro

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)