2-(l-Cyclohexenyl)-3-(d-methoxyvinyl)indole was heated in decalin in the presence of 5% Pd-C to give l,2,3,4-tetrahydro-5-methoxy-llH-benzo[a]carbazole and 5-methoxy-llff-benzo[o]carbazole. 3-(/S-Methoxyvinyl)-2-(1 -phenyl-1-propenyl)indole and 5-chloro-3-(/3-methoxyvinyl)-2-(l-phenyl-l-propenyl)indole were also heated in decalin in the presence of 5% Pd-C at 210 °C, yielding the carbazole alkaloids hyellazole and 6chlorohyellazole, respectively.
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