Allylic Hydroxylation Through Acid Catalysed Epoxy Ring Opening of Betulinic Acid Derivatives
摘要:
Acid catalysed epoxy ring opening of several lupane type triterpenoids leads to unusual allylic hydroxylation. The reaction involves the formation of epoxide by m-chloroperbenzoic acid followed by the treatment of mineral acid. The simple methodology finds utility to introduce a hydroxyl function at the allylic position in these triterpenoids, which is otherwise quite difficult.
Zur Kenntnis der Triterpene. (48. Mitteilung). Über Oxydationsprodukte des Lupeols und von Estern des Lupeols mit Phtalmonopersäure und mit Selendioxyd