Abstract
The reaction of dimethyl 1,4-tetrahydrothiazone-3,5-dicarboxylate with phenyl isocyanate and phenyl isothiocyanate leads to 2,4-dioxo-3-phenyl-9-methoxycarbonyl-7-thia-1,3-diazabicyclo[3.4.O]nonane and its thioxo analog. It is shown that only the trans isomer of the starting diester undergoes the reaction.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1056–1059, August, 1985.
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Eremeev, A.V., Nurdinov, R., Polyak, F.D. et al. Absolute configurations of diastereomeric esters of 1,4-tetrahydrothiazine-3,5-dicarboxylic acid. Chem Heterocycl Compd 21, 879–883 (1985). https://doi.org/10.1007/BF00519814
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DOI: https://doi.org/10.1007/BF00519814