Naturally occurring 1,2,8-trimethoxyxanthone and biphenyl ether intermediates leading to 1,2-dimethoxyxanthone.
Acta Crystallogr C
; 57(Pt 11): 1319-23, 2001 Nov.
Article
in En
| MEDLINE
| ID: mdl-11706262
ABSTRACT
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, C(16)H(16)O(5), 2-(3,4-dimethoxyphenoxy)benzoic acid, C(15)H(14)O(5), 1,2-dimethoxy-9H-xanthen-9-one, C(15)H(12)O(4), and 1,2,8-trimethoxy-9H-xanthen-9-one, C(16)H(14)O(5), 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.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plants
/
Xanthenes
/
Biphenyl Compounds
/
Xanthones
/
Ethers
Language:
En
Journal:
Acta Crystallogr C
Year:
2001
Document type:
Article
Affiliation country:
Portugal
Publication country:
EEUU
/
ESTADOS UNIDOS
/
ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
/
UNITED STATES OF AMERICA
/
US
/
USA