Abstract
Two new pigments,
haemofluorone A and haemofluorone B, have been isolated from the flowers of Macropidia fuliginosa Drum. and also
from the root system of Phlebocarya
ciliata R.Br. Spectroscopic analysis indicates the structures 5,8,9- and
8,9,11-trihydroxy-lH-naphtho[2,1,8-mna]xanthen-l-one. The former structure
has been confirmed by a synthesis of the trimethyl ether by photochemical oxidative
cyclization of 9-(3,4-dimethoxyphenyl)-6-hydroxy-2-methoxy-1H-phenalen-1-one.The parent chromophore, 1H-naphtho[2,1,8-mnalxanthen-1-one, and
the 2,5-dimethoxy derivative have also been prepared by analogous photochemical
reactions of the appropriate arylphenalenones.
Cited by
24 articles.
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