A series of new spiro-condensed 2-amino-4H-pyrans were synthesized by three-component interaction of 1,2-benzoxathiin-4(3H)-one 2,2-dioxide, malononitrile, and cyclic carbonyls in moderate to high yields. This is one of the first examples of 1,2-benzoxathiin-4(3H)-one 2,2-dioxide application in multicomponent transformations.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2019, 55(3), 254–260
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Grygoriv, G.V., Lega, D.A., Zaprutko, L. et al. Synthesis of novel spiro-condensed 2-amino-4H-pyrans based on 1,2-benzoxathiin-4(3H)-one 2,2-dioxide. Chem Heterocycl Comp 55, 254–260 (2019). https://doi.org/10.1007/s10593-019-02450-4
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DOI: https://doi.org/10.1007/s10593-019-02450-4