Synthetic studies towards complex diterpenoids. Part 19. Total synthesis of (±)-deoxofaveline, (±)-faveline methyl ether and (±)-faveline
Abstract
Simple and efficient syntheses have been developed for the cytotoxic dinorditerpenoids, (±)-deoxofaveline 1, (±)-faveline methyl ether 2 and (±)-faveline 3, having a hexahydrodibenzo[a,d]cycloheptene ring system, through the enolizable tricyclic ketone mixture 12 and 13, prepared from the easily accessible 2-arylethyl-3,3-dimethylcyclohexanone 7.