Abstract
Tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidines in the presence of activated alkynes were transformed into mixtures of pyrimido[5′,4′:4,5]thieno[3,2-d]azocines and spiro[pyridine-4,5′-thieno[2,3-d]pyrimidines].
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 368–377, February, 2012.
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Voskressensky, L.G., Borisova, T.N., Kovaleva, S.A. et al. Transformations of tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidin-4(3H)-ones in the presence of alkynes bearing electron-withdrawing substituents. Russ Chem Bull 61, 370–379 (2012). https://doi.org/10.1007/s11172-012-0052-3
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DOI: https://doi.org/10.1007/s11172-012-0052-3