Conclusions
A D-D′-homoannelation of 20β- and 20α-epimeric alcohols of the pregna-D6′-pentarane series with rupture of the C16-C17 and C17-C21 bonds, respectively, has been discovered.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2313–2318, October, 1987.
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Levina, I.S., Kulikova, L.E., Cherepanova, E.G. et al. Transformed steroids. 159. D-D′-homoannelation of 20-epimeric alcohols in the pregna-D6′-pentarane series. Russ Chem Bull 36, 2144–2149 (1987). https://doi.org/10.1007/BF00962007
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DOI: https://doi.org/10.1007/BF00962007