Utilize este identificador para referenciar este registo: http://hdl.handle.net/10451/21133
Título: A trihomoabietane diterpenoid from Plectranthus grandidentatus and an unusual addition of acetone to the ortho-quinone system of cryptotanshinone
Autor: Gaspar-Marques, C
Simoes, MF
Rodriguez, B
Palavras-chave: Plant Sciences
Chemistry, Medicinal
Pharmacology & Pharmacy
Data: 2005
Editora: AMER CHEMICAL SOC
Citação: JOURNAL OF NATURAL PRODUCTS. - Vol. 68, n. 9 (SEP 2005), p. 1408-1411
Resumo: A new 9 alpha-(2-oxopropyl)abietane derivative (1) has been isolated from an acetone extract of Pleectranthus grandidentatus. Extraction of the plant material and analytical processes carried out in the absence of acetone also revealed the presence of 1 in the plant, thus suggesting that it is a natural product rather than an artifact. Attempts at obtaining Michael adducts between acetone and para-quinone abietane diterpenoids were unsuccessful, whereas treatment of the ortho-quinone cryptotanshinone (3) with acetone under basic conditions yielded compound 2. The structures of 1 and 2 were established by 1D and 2D NMR spectroscopic studies.
URI: http://hdl.handle.net/10451/21133
DOI: http://dx.doi.org/10.1021/np0580457
ISSN: 0163-3864
Aparece nas colecções:FF - Produção Científica 2000-2009

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