Dihydroxyxanthones prenylated derivatives: Synthesis, structure elucidation, and growth inhibitory activity on human tumor cell lines with improvement of selectivity for MCF-7
作者:Raquel A.P. Castanheiro、Madalena M.M. Pinto、Artur M.S. Silva、Sara M.M. Cravo、Luís Gales、Ana M. Damas、Naïr Nazareth、Maria S.J. Nascimento、Graham Eaton
DOI:10.1016/j.bmc.2007.06.037
日期:2007.9
The synthesis, structureelucidation, and antitumor activity of 11 xanthones are reported, being the compounds 3, 4, 6-8, and 9 described for the first time. Xanthones 1 and 2 were used as building blocks to obtain the prenylated derivatives 3-8. Prenylation was carried out using prenyl bromide in alkaline medium. Dihydropyranoxanthones 9-11 were obtained from compounds 4 and 5 by an oxidative ring
Thermorubin II. 1,3-Dihydroxy-9H-xanthones and 1,3-dihydroxy-9H-xanthenes. New methods of synthesis
作者:Radhakrishna K. M. Pillai、Prakash Naiksatam、Francis Johnson、Raghavan Rajagopalan、Paul C. Watts、Renato Cricchio、Sonia Borras
DOI:10.1021/jo00355a024
日期:1986.3
Improved methodologies for synthesis of prenylated xanthones by microwave irradiation and combination of heterogeneous catalysis (K10 clay) with microwave irradiation
been synthesized for the first time by the microwaveirradiation method. Prenylation of the xanthone building blocks 1 and 2 with prenyl bromide in alkaline medium, using microwaveirradiation, gave the oxyprenylated xanthones 4 and 6, as major products in high yields, as well as diprenylated by-products (5, 7, 8, and 9) in very low yields. Microwaveirradiation of oxyprenylated xanthones 4 and 6 furnished