The reaction of (+)-usninic acid and its pyrazole derivative with sodium borohydride was studied. The reduction occurred stereoselectively at the endocyclic carbonyl group. Novel (+)-usninic acid derivatives that were reduction products of the carbonyls were obtained.
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 188–190, March–April, 2011.
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Sokolov, D.N., Luzina, O.A., Polovinka, M.P. et al. Reduction of (+)-usninic acid and its pyrazole derivative by sodium borohydride. Chem Nat Compd 47, 203–205 (2011). https://doi.org/10.1007/s10600-011-9882-8
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DOI: https://doi.org/10.1007/s10600-011-9882-8