Abstract
Mixtures of stereoisomers of the corresponding 4-hydroxy-4-cyanopiperidines were synthesized by the reaction of substituted 4-piperidones with hydrogen cyanide by an exchange reaction with acetone cyanohydrin. The ratios of the stereoisomers in the resulting mixtures of stereoisomeric 4-piperidone cyanohydrins were determined by means of the 13C NMR spectra, and the three-dimensional structures were established by direct determination of the orientation of the cyano group in their molecules. A dependence of the quantitative ratios of the stereoisomeric cyanohydrins of the substituted 4-piperidones on the reaction temperature was demonstrated.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1359–1363, October, 1990.
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Unkovskii, B.V., D'yakov, M.Y., Sokolova, T.D. et al. Stereospecificity of the addition of hydrogen cyanide to the carbonyl group of substituted 4-piperidones. Synthesis and three-dimensional structures of substituted 4-hydroxy-4-cyanopiperidines. Chem Heterocycl Compd 26, 1132–1136 (1990). https://doi.org/10.1007/BF00472184
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DOI: https://doi.org/10.1007/BF00472184