Determinação da Estereoquímica Relativa de Pimaradienos Através de Produtos de Oxidação Relative stereochemistry determination of pimaradienes through oxidative products

• Main Authors: Frederico Guaré Cruz, Nídia Franca Roque
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 1997-06-01
• Series: Química Nova
• Subjects: diterpenes; pimaradienes; stereochemistry
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421997000300006

<abstract language="eng">Pimaradienes, including isopimaradienes, with an endocyclic double bond between C-9 and C-11 are uncommon compounds in nature. The diterpenoid pimar-9(11),15-dien-19-oic acid (1) was isolated from Mikania triangularis (Asteraceae) and the correct stereochemistry of 1was established by ¹H and 13C NMR studies of several oxidative products, mainly epoxides, of this compound and its double bond isomers.