Isomerization of Thionolactones to Thiolactones

The isomerization of thionolactones to thiolactones was found to occur through the catalysis of In(OTf)3 as reported by Dunach et al in their screening of appropriate catalysts for such reactions [300]. However, BF3 Et20 was found to give better yields and selectivities (Figure 8.140). 

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