Abstract
Abstract The acetone-initiated photochemical addition of cis- or trans-2,4-dimethyl-1,3-dioxolane to methyl acrylate at −78°C leads to a mixture of geometrically isomeric methyl 3-(2,4-dimethyl-1,3-dioxolan-2-yl)propionates with partial retention of the original configuration of the starting dioxolane. This constitutes evidence for a pyramidal structure of the radical centre of 1,3-dioxolan-2-yl radicals involved as an intermediate in the photochemical addition.
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