Reduction of substituted 4-arylhexahydroquinazoline-2(1H)-thiones using NaBH4/CF3CO2H in chloroform gave the corresponding trans-fused octahydroquinazoline-2(1H)-thiones. The use of two reducing systems, NaBH4/CH3CO2H or NaBH4/CF3CO2H, permitted the consecutive trans-selective reduction of the endo- and exocyclic double bond in the case of 8-dithiomethylidene derivatives of hexahydroquinazoline-2(1H)-thiones.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 327-334, February, 2013.
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Gella, I.M., Bui, O.D., Mirnyi, A.V. et al. trans-Stereoselective Reduction of Hexahydroquinazoline-2(1H)-thione Derivatives. Chem Heterocycl Comp 49, 302–309 (2013). https://doi.org/10.1007/s10593-013-1247-8
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DOI: https://doi.org/10.1007/s10593-013-1247-8