A common and general access to berberine and benzo [c] phenanthridine alkaloids
摘要:
The S(RN)1 reactions between o-iodobenzamides and the enolate anion from 2-acetyl homoveratric acid lead to key tricyclic compounds which are easily converted to either berberine or benzo [c] phenanthridine ring systems providing thus a high-yielding and versatile access to both classes of alkaloids.