Abstract

An efficient synthesis of nitidine (1a).and fagaronine (1c), antitumor 2, 3, 8, 9-tetraoxygenated benzo [c] phenanthridine alkaloids, has been achieved via regioselective C6-N bond cleavage, followed by consecutive oxy-functionalization and recyclization between the C6 and C13 positions of the starting protoberberines, pseudoberberine (3a) and O-benzyldehydrodiscretine (3b), respectively.

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