Alkylation of indolizinethione at the sulfur atom by the action of RCOCH2Br (R = Me, Ar, CO2Me, OEt) leads to thioethers, and subsequent closure of the thiazine ring of which leads to the formation of stable antiaromatic thiazino[4,3,2-cd]indolizines.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2020, 56(7), 942–948
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Babaev, E.V., Nevskaya, A.А., Dlynnikh, I.V. et al. Synthesis of antiaromatic thiazinoindolizines based on electrophilic cyclizations of indolizine-5-thione. Chem Heterocycl Comp 56, 942–948 (2020). https://doi.org/10.1007/s10593-020-02754-w
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DOI: https://doi.org/10.1007/s10593-020-02754-w