Silica-catalyzed carboxylative cyclization of propargylic amines with CO2

[Display omitted] •Silica catalyzed the carboxylative cyclization of a propargylic amine with CO2.•MCM-41 was the most effective silica catalyst for the reaction.•The MCM-41catalyst was recovered by filtration and could be reused over ten times. By employing only silica as a catalyst, the carboxylat...

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Bibliographic Details
Published in:Tetrahedron letters 2020-11, Vol.61 (48), p.152557, Article 152557
Main Authors: Matsuo, Hideaki, Choi, Jun-Chul, Fujitani, Tadahiro, Fujita, Ken-ichi
Format: Article
Language:English
Subjects:
Carbon dioxide fixation
Cyclization
Silica
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Summary:[Display omitted] •Silica catalyzed the carboxylative cyclization of a propargylic amine with CO2.•MCM-41 was the most effective silica catalyst for the reaction.•The MCM-41catalyst was recovered by filtration and could be reused over ten times. By employing only silica as a catalyst, the carboxylative cyclization of a propargylic amine with CO2 proceeded to afford the corresponding 2-oxazolidinone. MCM-41, which was a mesoporous silica, was found to be the most effective silica for this purpose. Moreover, after the reaction, the MCM-41 catalyst was recovered by filtration and could be reused over ten times without deactivation.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2020.152557