Diterpenóides com esqueleto cleistantano de Vellozia aff. carunculares martius ex seubert (Velloziaceae)

• Main Authors: Silva Gilson Cruz da, Valente Ligia Maria Marino, Patitucci Maria Lucia, Pinto Angelo da Cunha, Menezes Nanuza Luíza de
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2001-01-01
• Series: Química Nova
• Subjects: Vellozia aff. carunculares; Velloziaceae; cleistanthane diterpenoids
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000500009

From the hexane extract of leaves, stem and roots, of Vellozia aff. carunculares, fourteen cleistanthane diterpenoids were detected by HRGC-MS, through the analysis of their fragmentation patterns. Comparison of their MS spectra with those of authentic standards previously isolated from other species of the family Velloziaceae allowed the identification, with a high degree of confidence, of eigth known cleistanthane diterpenoids. Of these, four were isolated and identified from their MS, IR and ¹H and 13C NMR spectra, as the known cleistantha-8,11,13-trien-7-one, cleistantha-8,11,13-trien-3,7-dione, cleistantha-1,8,11,13-tetraen-3,7-dione and the first reported 6-alpha-hydroxy-cleistantha-8,11,13-trien-7-one. The triterpenoid beta-amyrin was also isolated.