Lactones. Part 16: Lactonization of γ,δ-epoxy esters with p-Toluenesulfonic acid monohydrate (cas 104-150-4)

Add time:07/25/2019    Source:sciencedirect.com

The reaction of cyclic γ,δ-epoxy esters with p-toluenesulfonic acid monohydrate is described. The reaction carried out in benzene or methylene chloride gave tosyloxy lactones as product. The ethoxy or methoxy lactones were obtained when ethanol or methanol were used as solvent. A mechanism of this lactonization is proposed.

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