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Naturally occurring 1,2,8-trimethoxyxanthone and biphenyl ether intermediates leading to 1,2-dimethoxyxanthone

Title
Naturally occurring 1,2,8-trimethoxyxanthone and biphenyl ether intermediates leading to 1,2-dimethoxyxanthone
Type
Article in International Scientific Journal
Year
2001
Authors
Gales, L
(Author)
ICBAS
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de Sousa, ME
(Author)
Other
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Pinto, MMM
(Author)
FFUP
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Kijjoa, A
(Author)
ICBAS
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Damas, AM
(Author)
ICBAS
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Journal
Vol. 57
Pages: 1319-1323
ISSN: 0108-2701
Publisher: Blackwell
Indexing
Publicação em ISI Proceedings ISI Proceedings
Scientific classification
FOS: Natural sciences > Chemical sciences
Other information
Authenticus ID: P-000-SSG
Abstract (EN): In order to study structure-activity relationships, a series of mono-, di- and trioxygenated xanthones has been synthesized and the structures of methyl 2-(3,4-dimethoxyphenoxy)benzoate, C16H16O5, 2-(3,4-dimethoxyphenoxy)benzoic acid, C15H14O5, 1,2-dimethoxy-9H-xanthen-9-one, C15H12O4, and 1,2,8-trimethoxy-9H-xanthen-9-one, C16H14O5, have been determined. The first two compounds both assume skew conformations, the dihedral angles between the two phenyl rings being 80.04 (8) and 83.0 (1)degrees, respectively. The latter two compounds are essentially planar and their methoxy substituents assume orientations consistent with minimum steric interactions.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 5
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