Abstract
In the presence of cupric oxide as the catalyst, ethyl cyanoacetate reacts with 1-alkenes to form 1 : 1 adducts in high yields. The active catalytic component was found to be a soluble copper species generated in the absence of oxygen in 10-3 to 10-5 M concentrations by a partial dissolution of cupric oxide in ethyl cyanoacetate. The homogeneous catalytic reaction proceeds already at temperatures about 80 °C at a fast rate and with high selectivity. Results of inhibition experiments in the presence of α-naphthol and galvinoxyl support strongly the view on a free-radical mechanism of the addition reaction.
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