Novel transformation of β-keto sulfoxides to unsaturated β-keto sulfides
Abstract
Reaction of β-keto sulfoxides with trimethylsilyl trifluoromethanesulfonate in the presence of diisopropylethylamine afforded the corresponding (1E,3E)-1-phenylthio-2-(trimethylsilyloxy)-1,3-diene derivatives which underwent hydrolysis to furnish 1-phenylthio-alk-3-en-2-one derivatives in high yields.