Abstract
AbstractConcise syntheses of 9‐methoxyellipticine, 3,4‐dihydroellipticine (µ‐alkaloid D), 1,2,3,4‐tetrahydroellipticine, 2‐methyl‐1,2,3,4‐tetrahydroellipticine, olivacine, 3,4‐dihydroolivacine, (±)‐guatambuine, and (±)‐janetine were developed starting from hexatriene intermediates readily obtained by Pd‐catalyzed tandem cyclization/cross‐coupling reaction of indolylborates. The route enables the facile construction of pyrido[4,3‐b]carbazoles by Cu‐catalyzed 6π‐electrocyclization and subsequent transformation of the pyridocarbazole intermediates into pyrido[4,3‐b]carbazole alkaloids.
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