SnCl2-catalyzed synthesis of carbamates from renewable origin alcohols
| Autor: | Michele Jorge Silva Siqueira, Diêgo Chaves, Marcio Jose da Silva |
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| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Chemistry General Chemical Engineering General Chemistry Raw material 010402 general chemistry 01 natural sciences Biochemistry Industrial and Manufacturing Engineering 0104 chemical sciences Catalysis chemistry.chemical_compound Materials Chemistry Urea Organic chemistry Reactivity (chemistry) Organic synthesis Lewis acids and bases Phosgene Selectivity |
| Zdroj: | Chemical Papers. 72:1169-1180 |
| ISSN: | 1336-9075 2585-7290 |
| Popis: | Effects of structure and reactivity of renewable origin alcohols in the conversion and selectivity of the SnCl2-catalyzed reactions in the presence and absence of urea were assessed. Convenient simple and suitable method for the synthesis of carbamates from renewable origin alcohols and urea in one-step are provided. We have assessed the activity of SnCl2 catalyst, a commercially affordable Lewis acid, in reactions of urea alcoholysis with different natural origin alcohols (geranyl, neryl, bornyl, cinnamyl, α-terpinyl and benzyl alcohols), aiming to synthesize carbamates, which are biologically active compounds, building blocks in organic synthesis and raw material to synthesize polyurethanes. The low cost of urea, the water tolerant catalyst and phosgene free reaction are positive aspects of this carbamates synthesis process. The different reaction pathways were assessed. A mechanism was proposed based on FT-IR experiments and experimental data. |
| Databáze: | OpenAIRE |
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