The chemistry of indoles part 91 - Preparations of melatonin and 1-hydroxymelatonin, and its novel nucleophilic dimerization to (+/-)-3a,3a '-bispyrrolo[2,3-b]indoles
M. Somei et al., The chemistry of indoles part 91 - Preparations of melatonin and 1-hydroxymelatonin, and its novel nucleophilic dimerization to (+/-)-3a,3a '-bispyrrolo[2,3-b]indoles, HETEROCYCLE, 51(6), 1999, pp. 1237
A unique synthetic method for melatonin was established through biologicall
y promising synthetic intermediates, 1-Hydroxymelatonin was prepared as cry
stals for the first time. It reacted with 85% formic acid to give (+/-)-3a,
3a'-bispyrrolo[2,3-b]indole compound, whose structure was unequivocally det
ermined by X-Ray crystallographic analysis.