Implications of a Transition State in a Diels–Alder Reaction in Supercritical Carbon Dioxide

Abstract
For the Diels–Alder reaction between isoprene and methyl acrylate in supercritical carbon dioxide at 323 K, the solubility parameter of the activated complex was determined as a function of the pressure, ranging from 7 to 20 MPa, in order to study the nature of the complex and the effect of the solvent on the reaction. The relation between the solubility parameter and the ET(30)-scale was examined as well.