Concise syntheses of 5,6-dibromotryptamine and 5,6-dibromo-N,N-dimethyltryptamine en route to the antibiotic alternatamide D

Concise syntheses of the natural products 5,6-dibromotryptamine, 5,6-dibromo-N,N-dimethyltryptamine and the bromotryptamine antibiotic alternatamide D have been accomplished starting from the common intermediate, 5,6-dibromoindole-3-carbaldehyde.