Isolation and Oxidation Characteristics of Alkaloids of Aconitum volubile
2008
Heo, K.H. (Kyungsung University, Busan, Republic of Korea) | Lee, C.K. (Kyungsung University, Busan, Republic of Korea), E-mail: [email protected]
From the under ground part of Aconitum volubile Pall. (Ranunculaceae),seven nor- or di-terpenoid alkaloids were isolated and identified by NMR spectra and mass spectrum. The alkaloids were three C∧19-norditerpenoid alkaloids such as isotalatizidine, altaconitine and vilmorrianine A, and four C∧20-diterpenoid alkaloids such as 12-epidehydronapelline, 12-epinapelline, songoramine and songorine. Some of the isolated diterpenoid alkaloids were subjected to oxidation reaction with active MnO₂ and oxoammonium salt. The results were C-12 oxidation(ketone formation) and N-dealkylation in veatchin-type and decomposition to non-alkaloidal compounds in atisine-type ajaconine.
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