Studies on the Sapogenins of Dioscorea tokoro Mdkino. II The Structure of Tokorogenin
作者:Katsura Morita
DOI:10.1246/bcsj.32.791
日期:1959.8
the known steroid, 25D-5β-spirostan (IX), was established: Tokorogenin formed an acetonide (IIa), which could be tosylated and then hydrolyzed to give tokorogenin monotosylate (IVb). On treatment with alkali, IVb was led to anhydrotokorogenin (Va), which on oxidation with Py.—CrO3 and subsequent reduction with CrCl2 gave rise to an α,β-unsaturated ketone (VII). Catalytic hydrogenation of VII followed