Heterogeneous CeO₂ catalyst for the one-pot synthesis of organic carbamates from amines, CO₂ and alcohols
2011
Honda, Masayoshi | Sonehara, Satoru | Yasuda, Hiroshi | Nakagawa, Yoshinao | Tomishige, Keiichi
Heterogeneous CeO₂ catalyst can catalyze the one-pot synthesis of methyl benzylcarbamate from benzylamine, CO₂ and methanol. The yield of methyl benzylcarbamate reached 92% at >99% benzylamine conversion and 92% benzylamine-based selectivity even in the absence of the dehydrating agents. The catalyst is reusable after the calcination at 873 K for 3 h. Various carbamates can be synthesized with good yield and high selectivity by the reaction of amines + CO₂ + alcohols over CeO₂. The main formation route of methyl benzylcarbamate is suggested to be the reaction of dimethyl carbonate or the precursor of dimethyl carbonate formation with benzylamine.
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