Alcohols 4a,bderived from ketone 3 were transformed, in acidic medium, to the rearranged compounds 6 (or 6′) and to the pentacyclic derivative 8. This procedure provides easy access to the 16-deethylapovincamine skeleton.
衍生自酮 3 的醇 4a,b 在酸性介质中转化为重排的化合物 6(或 6')和五环衍
生物 8。该过程提供了对 16-脱乙基 apovincamine 骨架的轻松访问。