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Cobalt-Tetraamide-Phthalocyanine Immobilized on Fe3O4/Chitosan Microspheres as an Efficient Catalyst for Baeyer-Villiger Oxidation.


ABSTRACT: Cobalt-Tetraamide-Phthalocyanine (CoTaPc) immobilized onto magnetic Fe3O4 chitosan microspheres (Fe3O4/CTO) was synthesized via a simple immersion method, which is an efficient catalyst for the oxidation of cyclic ketones to lactones with O2/benzaldehyde as the oxidant. The CoTaPc-Fe3O4/CTO catalyst was applied for the first time in the Baeyer-Villiger (B-V) oxidation reaction. Characterization results obtained from X-ray diffraction, UV-vis, Fourier transform infrared, and scanning electron microscopy showed that the combination of CoTaPc and magnetic Fe3O4/CTO microspheres was achieved. The catalyst could be easily separated from the reaction system with an external magnet and reused several times without the remarkable loss of activity. In addition, a possible radical mechanism for the B-V oxidation in this catalytic system is proposed and verified by controlled experiments.

SUBMITTER: Tang Z 

PROVIDER: S-EPMC7226871 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Cobalt-Tetraamide-Phthalocyanine Immobilized on Fe<sub>3</sub>O<sub>4</sub>/Chitosan Microspheres as an Efficient Catalyst for Baeyer-Villiger Oxidation.

Tang Zhilin Z   Xiao Jin J   Li Fei F   Ma Zhanhu Z   Wang Li L   Niu Fanfan F   Sun Xiaoling X  

ACS omega 20200409 18


Cobalt-Tetraamide-Phthalocyanine (CoTaPc) immobilized onto magnetic Fe<sub>3</sub>O<sub>4</sub> chitosan microspheres (Fe<sub>3</sub>O<sub>4</sub>/CTO) was synthesized via a simple immersion method, which is an efficient catalyst for the oxidation of cyclic ketones to lactones with O<sub>2</sub>/benzaldehyde as the oxidant. The CoTaPc-Fe<sub>3</sub>O<sub>4</sub>/CTO catalyst was applied for the first time in the Baeyer-Villiger (B-V) oxidation reaction. Characterization results obtained from X-r  ...[more]

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