SCHEDULED MAINTENANCE
Pent-4-yonic acid, in various alcohols, was cyclised in the presence of yellow mercury(II) oxide to 4,5-dihydro-5-alkoxy-5-methylfuran-2(3H)-ones; 8-hydroxyoct-4-yonic acid was also cyclised in dimethylformamide to 1,6-dioxaspiro[4.5]decan-2-one in good yield.
M. Yamamoto, M. Yoshitake and K. Yamada, J. Chem. Soc., Chem. Commun., 1983, 991 DOI: 10.1039/C39830000991
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