Synthesis of N-(3- and 4-substituted phenyl)-O-isobutyl thionocarbamates from O-isobutyl xanthate and amines using a nano-platinum multi-walled carbon nanotube catalyst
| Autor: | Milutin M. Milosavljević, Radoslav Aleksić, Aleksandar D. Marinković, Petar S. Uskoković, Goran Vukovic |
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| Rok vydání: | 2011 |
| Předmět: |
Thermogravimetric analysis
Nanotube Nanostructure Inorganic chemistry chemistry.chemical_element Carbon nanotube 010402 general chemistry Heterogeneous catalysis 7. Clean energy 01 natural sciences law.invention Catalysis chemistry.chemical_compound Thionocarbamates Nano-Pt/NH2Ph-MWCNT law Amines 010405 organic chemistry General Chemistry Carbon-13 NMR 0104 chemical sciences chemistry Nucleophilic substitutions Xanthate Platinum Nuclear chemistry |
| Zdroj: | Monatshefte Fur Chemie |
| ISSN: | 1434-4475 0026-9247 |
| Popis: | Twelve N-(3- and 4-substituted phenyl)-O-isobutyl thionocarbamates, eight of which are novel, were synthesized from O-isobutyl xanthate and 3- and 4-substituted anilines in the presence of a nano-platinum aminophenyl modified multi-walled carbon nanotube catalyst. The nano-Pt catalyst was prepared on a carbon nanotube support modified by diazotization, nitro group reduction, and subsequent microwave-assisted nano-Pt precipitation. The catalyst was characterized by Fourier transform infrared (FT-IR) spectroscopy, elemental analysis, thermogravimetric analysis, and transmission electron microscopy. The nano-platinum/modified carbon nanotube catalyst was compared with a commercial Pt/active carbon catalyst in terms of product purity and yield. The results obtained by the use of the catalysts were additionally compared with those obtained by reaction of sodium isobutyl xanthogenacetate and 3- and 4-substituted anilines. Full structure characterization of the synthesized N-(substituted phenyl)-O-isobutyl thionocarbamates was achieved using FT-IR, H-1 and C-13 NMR, and mass spectrometric methods, and their purity was proved by elemental analysis and gas chromatography. The new catalytic method offers advantages over the commercial method, such as higher yields and no product purification is required, thus conforming to the principles of ecologically friendly syntheses. |
| Databáze: | OpenAIRE |
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