Collective Total Syntheses of Benzo[ c ]phenanthridine Alkaloids via a Sequential Transition Metal-Catalyzed Pot-Economic Approach.

Collective total syntheses of 10 benzo[ c ]phenanthridines were achieved on the basis of the construction of rings C and B through sequential transition metal-catalyzed reactions and flexible condition-controlled Mannich reaction via three pots in 25-34% yields, which provided an efficient route to benzo[ c ]phenanthridines via a pot-economic approach.