Conclusions
Based on the stereochemistry established for the cycloadducts obtained by the reaction of 3R-4,5-dihydro-6H-1,2-oxazine N-oxides with monosubstituted olefins it was shown that the exo approach of the olefin to the dipoles is realized exclusively in the case of styrene, and preferentially in the case of methyl acrylate and acrylonitrile.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 211–214, January, 1977.
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Shitkin, V.M., Chlenov, I.E. & Tartakovskii, V.A. Steric structure of 6 R-8 R'-2,9-diox A-1-azabicyclo [4.3.0]nonane derivatives. Russ Chem Bull 26, 187–189 (1977). https://doi.org/10.1007/BF00921528
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DOI: https://doi.org/10.1007/BF00921528