Lactones. Part 16: Lactonization of γ,δ-epoxy esters with p-toluenesulfonic acid monohydrate |
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| Authors: | Czes?aw Wawrzeńczyk Ma?gorzata GrabarczykAgata Bia?ońska Zbigniew Ciunik |
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| Institution: | a Department of Chemistry, Agricultural University, Norwida 25, 50-375 Wroc?aw, Poland
b Faculty of Chemistry, University of Wroc?aw, F. Joliot-Curie 14, 50-383 Wroc?aw, Poland |
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| Abstract: | 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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| Keywords: | lactones acidic lactonization epoxy esters X-ray crystal structures |
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