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Yoshito Kishi (1937-2023)
Yoshito Kishi (1937-2023)
Professor. Yoshito Kishi,
a member of the Honorary Editorial Associates of HETEROCYCLES,
has passed away on January 9, 2023 at the age of 85.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
January 13, 2023
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Paper | Regular issue | Vol 34, No. 6, 1992, pp.1101-1106
Published online, 1st January, 1970■ Tetracyclic Indole Derivatives from the Reaction of Methyl 2,4-Dioxo-6,6-dimethoxyhexanoate with Tryptamine: Indolo[2,3-a]quinolizidine vs 3,7a-Diazacyclohepta[jk]fluorene
Published online, 1st January, 1970
DOI: 10.3987/COM-91-5957
■ Tetracyclic Indole Derivatives from the Reaction of Methyl 2,4-Dioxo-6,6-dimethoxyhexanoate with Tryptamine: Indolo[2,3-a]quinolizidine vs 3,7a-Diazacyclohepta[jk]fluorene
Jean-Yves Laronze,* Jacqueline Laronze, F. Wemba-Lenga, and Jean Lévy
*Laboratoire de Transformations et Synthèse deSubstances Naturelles, associé au CNRS, Université de Reims, Faculté de Pharmacie, 51 rue Cognacq-Jay, 51096 Reims, France
Abstract
Depending on the acid used for cyclization, reaction of methyl 6,6-dimethoxy-2,4-dioxohexanoate (4) with tryptamine yielded indoloquinolizidine (8) (AcOH) or diazacycloheptafluorene (10) (TFA). Treatment of 8 with TFA gave 10.
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