Pharmaceuticals 2009, 2(2), 33-43; doi:10.3390/ph2020033
Article

Antitumor Activity of Some Prenylated Xanthones

1email, 2, 1, 1,3 and 1,4,* email
Received: 1 July 2009; in revised form: 29 July 2009 / Accepted: 10 August 2009 / Published: 11 August 2009
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Pyranoxanthones 6-8 were obtained by dehydrogenation of the respective dihydropyranoxanthones 3-5 with DDQ in dry dioxane. Two prenylated xanthones 10,11 were obtained from the reaction of 1-hydroxyxanthone (9) with prenyl bromide in alkaline medium, or by condensation of xanthone 9 with isoprene in the presence of orthophosphoric acid. The structural elucidation of the two new compounds 6,11, as well as an update of data for the already described prenylated derivatives 7,8,10 were accomplished by IR, UV, HRMS and NMR (1H, 13C, HSQC and HMBC) techniques. The effect of the prenylated xanthone derivatives on the in vitro growth of human tumor cell lines MCF-7 (breast adenocarcinoma) and NCI-H460 (non-small cell lung cancer) is also reported. Compounds 10 and 11 have been found to exhibit a moderate growth inhibitory activity against the MCF-7 cell line.
Keywords: xanthones; prenylation; dehydrogenation; antitumor activity; NMR spectroscopy
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MDPI and ACS Style

Castanheiro, R.A.; Silva, A.M.; Campos, N.A.; Nascimento, M.S.; Pinto, M.M. Antitumor Activity of Some Prenylated Xanthones. Pharmaceuticals 2009, 2, 33-43.

AMA Style

Castanheiro RA, Silva AM, Campos NA, Nascimento MS, Pinto MM. Antitumor Activity of Some Prenylated Xanthones. Pharmaceuticals. 2009; 2(2):33-43.

Chicago/Turabian Style

Castanheiro, Raquel A.; Silva, Artur M.; Campos, Naïr A.; Nascimento, Maria S.; Pinto, Madalena M. 2009. "Antitumor Activity of Some Prenylated Xanthones." Pharmaceuticals 2, no. 2: 33-43.

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