Abstract
A novel oxidative coupling method of 2-lithio-1-methoxyindole was developed resulting in the formation of 2,2'-bis(1-methoxyindole) (6). Catalytic hydrogenation of 6 produced 2,2'-bisindole (9). Diels-Alder reaction of 9 with dienophiles afforded indolo[2,3-a] carbazole derivatives
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