In the present paper, the coupling reaction of aldehyde, terminal alkyne, amine salt and CO2 was investigated.
Copper iodide was found to be an efficient catalyst for the coupling reaction in ethyl acetate at 80 °C and under an atmospheric
pressure of CO2. A diverse range of oxazolidinones was prepared by this method. Subsequently, a copper-catalyzed
coupling of aldehyde, terminal alkyne, diamine salt and CO2 was developed to generate a dioxazolidinone. Finally, under
the optimised conditions, we report for the first time a facile synthetic route for the synthesis of polyoxazolidinone, a new
polyurethane, via a multi-component coupling of benzaldehyde, 1, 4-diethynylbenzene, 1, 6-hexadiamine and CO2.
Keywords: Carbon dioxide fixation, copper catalysis, multicomponent reactions, oxazolidinone, polyurethane, transition-metal, cyclic, carbonates, cobalt, ruthenium.
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