Two dolabrane-type diterpenoids

• Tipo: Artigo em Revista Científica Internacional
• Data: 1997

Autores

damas, am (Autor) Outra; kijjoa, a (Autor) ICBAS; pinto, m (Autor) FFUP

Revista

Título: Acta Crystallographica Section C: Crystal Structure Communications

Vol. 53

Páginas: 755-757

ISSN: 0108-2701

Editora: Blackwell

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-001-B7X

DOI: 10.1107/S0108270196015752

Abstract (EN): The crystal structures of two dolabrane diterpenes, ent-2-seco-3-nor-5 alpha,4,15-dioxo-16-hydroxydolabran-2-oic acid, C19H30O5, (I), and ent-2-seco-3-nor-5 alpha,16-chloro-15-hydroxydolabran-2-oic acid, C(19)H(31)C(10)4, (II), have been determined at room temperature. They revealed the presence of two trans-fused rings having a chair conformation and they confirmed previous NMR studies showing that the C9 substituent is trans with respect to those at C8 and C10. Furthermore, we observed that the longer C-Sp3-C-sp3 distances occur for C9-C10 and C5-C10, which is in agreement with the values found in other diterpenes. These are the first reported crystal structures of dolabrane molecules.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3