Synthesis, Antibacterial, and Analgesic Activity of Novel 4-Hydroxy-3- (phenylthio)-2H-chromen-2-ones and 4-Hydroxy-3-[imidazol/tetrazolo-2-yl)thio]-2H-chromen-2-ones

A mild and efficient synthesis of new 4-hydroxy-3-(phenylthio)-2H-chromen-2-ones 4a–k and 4-hydroxy-3-[imidazol/tetrazolo-2-yl)thio]-2H-chromen-2-ones 6a–d is described. The compounds 4a–c were further subjected to oxidation by m-CPBA to obtain 3-(phenylsulfonyl)-4-hydroxy-2H-chromen-2-ones 5a–c. The structures of the resulted new compounds were established by IR, 1H NMR, mass, and elemental analysis. All the synthesized compounds were subjected to antibacterial activity against the Gram positive bacteria Staphylococcus aureus, Bacillus subtilis, and Streptococcus haemolytius and the Gram negative bacteria Salmonella typhi, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumonia. The analgesic activity was carried out using Swiss albino male mice by abdominal concentration method. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.