Abstract
Acyloxiranes react with aliphatic ketones in the presence of boron trifluoride etherate to give the corresponding 4-acyl-1,3-dioxolanes. The corresponding 4,5s-dimethyl-4r-acetyl-1,3-dioxolanes are formed in this case from 2,3t-dimethyl-2r-acetyloxirane, whereas a mixture of cis- and trans-1,3-dioxolanes is formed from trans-2-acetyl-3-phenyloxirane and acetone. The reaction of acyloxiranes with unsymmetrical ketones gives a mixture of the cis- and trans-1,3-dioxolanes with respect to the substituents attached to C-2 relative to the acetyl group, whereas the isomer ratio in this case depends on the effective volumes of the substituents attached to C-2.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 907–910, July, 1975.
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Tishchenko, I.G., Bubel', O.N., Stasevich, G.Z. et al. Reactions of acyloxiranes with aliphatic ketones. Chem Heterocycl Compd 11, 795–798 (1975). https://doi.org/10.1007/BF00497296
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DOI: https://doi.org/10.1007/BF00497296