Synthesis of some 3-aryl-1<i>H</i>-isochromene-1-thiones
作者:Aamer Saeed、Zaman Ashraf
DOI:10.1002/jhet.5570450307
日期:2008.5
A rapid microwave-accelerated thionation of some 3-substitued isocoumarins to corresponding 1-thio-isocoumarins was achieved employing Lawesson's reagent under solventless conditions.
A series of 3-substituted-1H-isochromene-1-thiones (3) were prepared by the reaction of 3-substituted isocoumarins (2) with Lawesson's reagent in the presence of toluene under a nitrogen atmosphere. The antimicrobial activities of the newly synthesized products were measured using Gram-negative (Escherichia coli, Salmonella typhi, and Proteus mirabilis) and Gram-positive bacteria (Staphylococcus aureus and Bacillus cereus). Synthesized thioanalogue of isocoumarins showed good antibacterial activity against Proteus mirabilis.