Lokalisierung der Ketogruppe in Inandenin‐onen. 160. Mitteilung über Alkaloide

Localization of the keto group in Inandenin‐ones . By Schmidt degradation of the spermidine alkaloids inandenine‐12‐on ( 1 ) and inandenine‐13‐on ( 2 ) from Oncinotis inandensis followed by hydrolysis, acetylation and esterification four different types of products were obtained: the dicarboxylic diesters 9 and 10 , the ω‐amino‐carboxylic esters 11 and 12 , the acetylated polyamines 14 and 15 , and the acetylated triaminecarboxylic esters 16 and 17 . By GLC. and mass spectral analysis of these degradation products, and by comparison with synthetic compounds it was possible to confirm the structures 1 and 2 . The same alkaloid mixture ( 1+2 ) was obtained from the leaves of Oncinotis nitida B ENTH .