Structural Confirmation of 15-Norlubiminol and 15-Norepilubiminol, Isolated from Solanum aethiopicum, by Chemical Conversion from Lubimin and Epilubimin, and their Antifungal Activity
15-Norlubiminol and 15-norepilubiminol were obtained from Solanum aethiopicum as an inseparable 1:1 mixture in a relatively poor yield to that of the major phytoalexins, lubimin and epilubimin. Their structures were confirmed by chemical conversion starting from lubimin and epilubimin. Baeyer-Villiger oxidation of the protected lubimins with m-chloroperoxybenzoic acid provided the desired formates