Abstract A new alkaloid solanaviol ((22 R , 25 R )-spirosol-5-ene-3β,12β-diol) was isolated from Solanum aviculare in addition to solasodine as one of the main alkaloids. The structure of solanaviol was established by NMR spectroscopy, as well as by conversion into a known pregnane derivative and solasodine.
摘要 以茄子碱为主要生物碱之一,从茄属植物中分离得到一种新的生物碱茄碱((22 R , 25 R )-spirosol-5-ene-3β,12β-diol)。茄子醇的结构是通过核磁共振光谱确定的,以及通过转化为已知的孕烷衍生物和茄碱。
Application of the Reich iodoso syn-elimination for the preparation of an intermediate appropriate for the synthesis of both hexacyclic steroidal units of cephalostatin 7
作者:Seongkon Kim、P.L. Fuchs
DOI:10.1016/0040-4039(94)85350-9
日期:1994.9
Hecogenin acetate 5 was converted to an intermediate suitable for construction of both “North” and “South” hexacyclic spiroketals present in cephalostatin 7. The key chemical transformations involved are: (1) the Reich iodoso syn-elimination of iodide 18; (2) Rhodium [II] catalyzed intermolecular oxygen alkylation of secondary neopentyl alcohol 21; and (3) Intramolecular Wadsworth-Emmons reaction to
Über Digitanolglykoside, 15. Synthese von 12α.20
<i>R</i>
‐Epoxy‐5α.14β.17βH‐pregnanen
作者:Rudolf Tschesche、Ernst Schwinum
DOI:10.1002/cber.19671000213
日期:1967.2
Ausgehend von Hecogeninacetat wurden auf zwei verschiedenen Wegen erstmals synthetisch 5α.14β.17βH-Pregnane (9, 19) mit einem 12α.20R-Oxidring hergestellt, wie er im Diginigenin, dort allerdings in der 20S-Konfiguration, vorkommen soll.
927. By-ways of synthesis of cortisone from hecogenin. Part II. A route to 11-oxygenated compounds through 3β : 20β-diacetoxy-11-bromoallopregnan-12-one
作者:R. K. Callow、V. H. T. James
DOI:10.1039/jr9560004744
日期:——
Adams et al., Journal of the Chemical Society, 1955, p. 870,875