Ruthenium-Na2CO3-catalyzed one-pot synthesis of ring-hydrogenated carbamates from aromatic amines and organic carbonates under H-2
- Authors
- Mishra, Vivek; Cho, Jin Ku; Shin, Seung-Han; Suh, Young-Woong; Kim, Hoon Sik; Kim, Yong Jin
- Issue Date
- Oct-2014
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Aromatic amine; Alkylene carbonate; Carbamate; Ring hydrogenation; Ruthenium catalyst; Sodium carbonate
- Citation
- APPLIED CATALYSIS A-GENERAL, v.487, pp.82 - 90
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED CATALYSIS A-GENERAL
- Volume
- 487
- Start Page
- 82
- End Page
- 90
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/159005
- DOI
- 10.1016/j.apcata.2014.09.013
- ISSN
- 0926-860X
- Abstract
- A facile and efficient one-pot procedure for the synthesis of ring hydrogenated carbamates from aromatic amine and alkylene carbonate under H-2 gas pressure has been developed using a heterogeneous catalyst system comprising ruthenium and alkali metal carbonates. The effects of temperature, H-2 pressure, catalyst (types of loaded metal and their supports), molar ratio of substrate/catalyst, and solvent were also investigated. Among the alkali metal carbonates, the sodium carbonate was found as best promoter for nucleophilic attack and ring-opening (NARO) reaction and thus increased the yield of ring hydrogenated carbamate up to 88% when using Ru/C as ring hydrogenation (RH) catalyst. This catalyst system could be reused at least five times without significant loss of activity, which makes this process cost-effective and eco-friendly.
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