A convenient procedure for introducing arylsulfanyl and heterylsulfanyl groups into the 5 position of the oxazole ring
作者:A. V. Golovchenko、V. S. Brovarets、B. S. Drach
DOI:10.1007/s11176-005-0023-6
日期:2004.9
Available (2-aryl-5-mesyl-1,3-oxazol-5-yl)triphenylphosphonium salts readily react with sodium thiophenolates and their heterocyclic analogs by way of substitution of the mesyl group by an arylsulfanyl or a heterylsulfanyl group. Treatment of the products with sodium hydroxide results in their mild dephosphorylation, which was used for preparative synthesis of a series of 2-aryl-5-arylsulfanyl(heterylsulfanyl)-1,3-oxazoles.
Excellent anticancer activity of 1,3-oxazol-4-ylphosphonium salts has been demonstrated in a total panel of NCI tumor cell lines. The average values of the antitumoractivity parameters of the most potent derivatives ranged from 0.3–1.1 μM (GI50), 1.2–2.5 μM (TGI), and 5–6 μM (LC50). The cytotoxicity vector of the compound 9 showed a high positive correlation with standard antitumor agents that induce