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22.1.3.1.2.3 Variation 3: With Phosphorus Pentasulfide and Hexamethyldisiloxane

DOI: 10.1055/sos-SD-022-00101

Glass, R. S.Science of Synthesis, (20052289.

Reaction of esters and lactones with the combination of phosphorus pentasulfide and hexamethyldisiloxane gives the corresponding thiocarboxylic O-acid esters 7 and thionolactones in 2187% yield (Schemes 6 and 7).[‌12‌] The yields are generally equal to or greater than those obtained with Lawesson's reagent under conventional conditions. In addition, the workup is easier with these reagents than with Lawesson's reagent.

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References


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