Polarized Ketene Dithioacetals; 55: Synthesis of Novel 5-Aryl-2-methylthio-4H-pyran-4-ones from Cinnamoylketene Dithioacetals

Article abstract of DOI:10.1055/s-1987-28112

A novel method for the synthesis of 5-aryl-2-methylthio-4H-pyran-4-ones 4a-h has been developed from the corresponding cinnamoylketene dithioacetals 1a-h in three successive steps.In the first step, 1a-h were oxidized with alkaline hydrogen peroxide to gi