Abstract
The direct incorporation of CO2 into alkynes in the presence of nucleophiles has been investigated. Vinylcarbamates and dienylcarbamates can be regioselectively produced in one-step from terminal alkynes or isopropenylacetylene, CO2 and secondary amines with ruthenium catalysts. Reactions of propargyl alcohol derivatives and CO2 can lead selectively to β-oxopropylcarbamates, with ruthenium catalysts, and to α-methylene cyclic carbonates or functional α-methylene oxazolidinones with phosphines catalysts.
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