Abstract
AbstractA benzyne type reaction of 1‐bromo‐3,4‐dimethoxybenzene (V) with 3,4‐dihydro‐6,7‐methylenedioxy‐I(2H)naphthalenone (VI) gave the tetralone derivative VII, which was converted into the amine IX via the oxime VIII. A Mannich reaction of IX afforded the benzo[c]phen‐anthridine II which was then transformed into oxynitidine (I) and nitidine (IV).
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