Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Structure of Gardneramine and 18-Demethylgardneramine
SHINICHIRO SAKAI, NORIO AIMI, AKINORI KUBO, MASAYUKI KITAGAWA, MASAKO HANASAWA, KIYOAKI KATANO, KEIICHI YAMAGUCHI, JOJU HAGINIWA
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1975 Volume 23 Issue 11 Pages 2805-2817

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Abstract
Gardneramine, the main alkaloid of Gardneria spp. (Loganiaceae), was found to have the structure I. At the same time a minor base, alkaloid G, was elucidated to be 18-demethylgardneramine (XVIII). Both alkaloids have an iminoether ring as the masked oxindole, some novel reactivities of which are described. Three trimethoxy oxindoles (XXXII a, b, c) were synthesized as the model compounds for locating the aromatic substituents of I.
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© The Pharmaceutical Society of Japan
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