1-Methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid, produced in situ from tryptophan and acetaldehyde, was oxidatively decarboxylated with sodium hypochlorite affording a dihydro-β-carboline which on condensation with N-methyl-Δ1-pyrrolinium acetate and subsequent aerial oxidation afforded brevicolline.
E. Leete, J. Chem. Soc., Chem. Commun., 1979, 821 DOI: 10.1039/C39790000821
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