The Course of the Catalytic Hydrogenation/Isomerization Reaction of Steroidal Ring B Olefins in the 13?- and 13?-Series
作者:Georg Acklin、Walter Graf
DOI:10.1002/hlca.19790620825
日期:1979.12.12
The course of the catalytic hydrogenation and isomerization (H2/Raney-Ni/dioxane or H2/Pd/C/EtOH) of Δ5.7-, Δ7-, Δ8-, and Δ8(14)-steroid olefins was shown to depend strongly on the configuration at C(13). The known hydrogenation/isomerization of reactions of Δ5.7-dienes in the 13β-series to Δ7-(H2/Raney-Ni/dioxane) and Δ8(14)-olefins (H2/Pd/C/EtOH) were also confirmed in the 3β, 19-epoxy-13β- and
The synthesis of (–)-sandaracopimaradiene from androstane derivatives
作者:P. Johnston、R. C. Sheppard、C. E. Stehr、S. Turner
DOI:10.1039/j39660001847
日期:——
D by reduction of the ozonide and selective oxidation of the seco-diol or triol with manganese dioxide yielded ring-D homo-lactones, which were converted by way of the β-keto-lactone into (–)-sandaracopimaradiene.