YAKUGAKU ZASSHI
Online ISSN : 1347-5231
Print ISSN : 0031-6903
ISSN-L : 0031-6903
Chemistry of Damnacanthus Genus. I
The Anthraquinone Coloring Matter from Damnacanthus major, D. major var. parvifolius, and D. indicus var. microphyllus. (1)
Susumu Nonomura
Author information
JOURNALS FREE ACCESS

1955 Volume 75 Issue 2 Pages 219-221

Details
Abstract

Anthraquinone pigments were isolated from Damnacanthus major Sieb. et Zucc., D. major Sieb. et Zucc. var. parvifolius Koidz., and D. indicus Gaertner fil. var. microphyllus Makino (Rubiacea family), and were designated as follows: Damnacanthal (m.p. 208°), juzunal (m.p. 248°), damnacanthol (m.p. 288°), damnidin (m.p. 180°), and a neutral substance (m.p. 160°). Of these, damnacanthal is identical with the substance, C16H10O5 (B), isolated by Perkin from Morinda umbellata L. It is an anthraquinone containing α-methoxyl and is saponified by sulfuric acid or alkali to form nordamnacanthal, m.p. 218°, which is the decarboxylation product of m.p. 218° obtained by Perkin. Heating of damnacanthal with alkali yielded purpuroxanthin.

Information related to the author
© by the PHARMACEUTICAL SOCIETY OF JAPAN
Previous article Next article
feedback
Top