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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Gales, L (Autor) ICBAS; de Sousa, ME (Autor) Outra; Pinto, MMM (Autor) FFUP; Kijjoa, A (Autor) ICBAS; Damas, AM (Autor) ICBAS

Revista

Título: Acta Crystallographica Section C: Crystal Structure Communications

Vol. 57

Páginas: 1319-1323

ISSN: 0108-2701

Editora: Blackwell

Indexação

ISI Proceedings

ISI Web of Knowledge - 24 Citações

Scopus - 26 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-000-SSG

DOI: 10.1107/s010827010101349x

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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5