One-pot catalytic synthesis of urea derivatives from alkyl ammonium carbamates using low concentrations of CO2
Autor: | Jun-Chul Choi, Masahito Uchida, Kazuhiro Matsumoto, Norihisa Fukaya, Hiroki Koizumi, Satoshi Hamura, Kazuhiko Sato, Katsuhiko Takeuchi, Seiji Matsumoto |
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Rok vydání: | 2021 |
Předmět: |
chemistry.chemical_classification
010405 organic chemistry Exhaust gas General Chemistry 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences Catalysis Solvent Chemistry chemistry.chemical_compound chemistry Carbon dioxide Materials Chemistry Environmental Chemistry Organic chemistry Ammonium Urea derivatives QD1-999 Volume concentration Alkyl |
Zdroj: | Communications Chemistry, Vol 4, Iss 1, Pp 1-7 (2021) |
ISSN: | 2399-3669 |
Popis: | To reduce anthropogenic carbon dioxide (CO2) emissions, it is desirable to develop reactions that can efficiently convert low concentrations of CO2, present in exhaust gases and ambient air, into industrially important chemicals, without involving any expensive separation, concentration, compression, and purification processes. Here, we present an efficient method for synthesizing urea derivatives from alkyl ammonium carbamates. The carbamates can be easily obtained from low concentrations of CO2 as present in ambient air or simulated exhaust gas. Reaction of alkyl ammonium carbamates with 1,3-dimethyl-2-imidazolidinone solvent in the presence of a titanium complex catalyst inside a sealed vessel produces urea derivatives in high yields. This reaction is suitable for synthesizing ethylene urea, an industrially important chemical, as well as various cyclic and acyclic urea derivatives. Using this methodology, we also show the synthesis of urea derivatives directly from low concentration of CO2 sources in a one-pot manner. Upconverting anthropogenic CO2 into valuable chemicals generally involves separation and concentration steps of the feed gas. Here, the authors report an efficient, one-pot method for synthesizing urea derivatives from alkyl ammonium carbamates obtained from atmospheric CO2 or simulated exhaust gas with low concentrations of CO2. |
Databáze: | OpenAIRE |
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