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Synthesis of crab type Aminomethyldiphosphine‐Oxovanadium(IV) complexes supported on magnetic Nano particles: Selective and recoverable catalysts in vitamin K3 synthesis

Nano Fe3O4 particles were obtained in microvawe oven using closed system. Oxovanadium(IV) complexes of Fe3O4@SiO2@(aminomethylphosphine) type ligands were synthesized and characterized using SEM, EDX, TEM, UV‐Visible, XRD, FT‐IR and TG/DTA techniques. Catalytic properties of the synthesized pincer type oxovanadium(IV)‐aminomethylphosphine complexes supported on magnetic nano structure were investigated in the synthesis of 2‐methyl‐1, 4‐naphthoquinone (Vitamin K3, menadione, 2MNQ) from 2‐methyl naphthalene (2MN) in hydrogen peroxide, acetic acid and sulfuric acid. Magnetic‐nano particle supported oxovanadium(IV)‐aminomethylphosphine type complexes were very efficient catalysts with the 51.36‐55.20 % selectivities in conversions of 89.78‐95.01 %. Besides, the hetergeneous complexes were very active in five cycling tests on avarage evaluated in the reusability.

Fe3O4@SiO2@(aminomethylphosphine)‐oxovanadium(IV) type complexes active catalyst in vitamin K3 (2‐methyl‐1, 4‐naphthoquinone) synthesis.

Authors:   Serhan Uruş, Mahmut Çaylar, Ferudun Koçer
Journal:   Applied Organometallic Chemistry
Year:   2018
Pages:   n/a
DOI:   10.1002/aoc.4219
Publication date:   17-Jan-2018
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