Tetrahedron Letters p. 7275 - 7278 (1999)
Update date:2022-08-03
Topics:
Fresneda, Pilar M.
Molina, Pedro
Delgado
A seven-step synthesis of the 1-methyl-3-(o-azidophenyl)quinolin-2-one, a common intermediate for the synthesis of the cryptotackieine and cryptosanguinolentine alkaloids, is described. This intermediate is directly converted into cryptotackieine 1 by an intramolecular aza-Wittig reaction with trimethylphosphine; alternatively heating followed by reduction of the resulting indoloquinoline derivative provided cryptosanguinolentine 2.
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