Saponin and Sapogenol. XI. Chemical Correlation of Spergulagenin A, a New Migrated Hopane-type Sapogenol, with Hydroxyhopane

Abstract

The chemical correlation of spergulagenin A (1), which is a new migrated hopane-type sapogenol elucidated previously from the root of Mollugo spergula L., with hydroxyhopane (2) has been accomplished through the conversion of both to the common derivative 4a (=7a). The Meerwein-Ponndorf type reduction of the methylcarbonyl moiety in spergulagenin A (1), which occurs on prolonged treatment with ethanolic alkali, has been described.