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- W2352104453 abstract "Sterically hindered alkoxyamine of hexa-atonic cycle compound containing nitrogen is the key intermediate for synthesizing the flame retardant with excellent fire retardancy for the polypropylene fiber. Sterically hindered nitroxyl radical—1-oxyl-2,2,6,6-tetramethylpiperid-4-one was synthesized by using 2,2,6,6-tetramethylpiperid-4-one as the raw material, ion exchange resin loaded Mg(Ⅱ) as catalyst, and hydrogen peroxide as oxidant. 1-cyclohexyloxy-2,2,6,6- tetramethylpiperid-4-one was synthesized by using cyclohexane and sterically hindered nitroxyl radical synthesized above as raw materials, hydrogen peroxide and ferrous sulfate heptahydrate as oxidation-reduction initiator, and tetrabutyl ammonium bromide as phase transfer catalyst. The effects of catalyst, phase transfer catalyst and technology conditions on the syntheses were investigated. The structure and purity of products were characterized and measured by electron-spin resonance (ESR), ESI-MS、1H-NMR、13C-NMR and HPLC. The results show that using the ion exchange resin loaded Mg(Ⅱ) as catalyst is advantageous to the separation of the sterically hindered nitroxyl radical from the reaction system, and that in the synthesis of the sterically hindered alkoxyamine, the use of cyclohexane as a raw material has the superiority of the synthesis cost." @default.
- W2352104453 created "2016-06-24" @default.
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- W2352104453 date "2010-01-01" @default.
- W2352104453 modified "2023-09-30" @default.
- W2352104453 title "Synthesis and Characterization of 1-Cyclohexyloxy-2,2,6,6-tetramethylpiperid-4-one" @default.
- W2352104453 hasPublicationYear "2010" @default.
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