Abstract
Solvent effect on the ratio of the endo and exo isomers formed by the Diels-Alder reaction of cyclopentadiene with acrylic acid esters can be described by multiparameter equations involving solvent polarity and electrophilic solvating power as determining parameters. The solvent polarity parameter Ω based on the stereoisomer ratio in the reaction with methyl acrylate cannot be regarded as a universal measure of solvating power, which was demonstrated using a number of examples.
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Original Russian Text © N.M. Karpyak, R.G. Makitra, G.A. Marshalok, E.Ya. Pal’chikova, 2008, published in Zhurnal Obshchei Khimii, 2008, Vol. 78, No. 1, pp. 111–117.
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Karpyak, N.M., Makitra, R.G., Marshalok, G.A. et al. Solvent effect on the stereoselectivity in cycloaddition of cyclopentadiene to unsaturated esters. Invalidity of the solvent polarity parameter Ω. Russ J Gen Chem 78, 106–111 (2008). https://doi.org/10.1134/S1070363208010180
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DOI: https://doi.org/10.1134/S1070363208010180