Spiropyranobenzopyrandiones were prepared, reduced, and dehydrated to form spirosubstituted pyranocoumarins.
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We thank OAO Eximed (Kiev, Ukraine) for help in performing the work.
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 135–139, March–April, 2009.
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Nagorichna, I.V., Tkachuk, A.A., Garazd, M.M. et al. Modified coumarins. 28. Synthesis of spirosubstituted pyranocoumarins. Chem Nat Compd 45, 152–157 (2009). https://doi.org/10.1007/s10600-009-9260-y
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DOI: https://doi.org/10.1007/s10600-009-9260-y