Process for preparing 4-hydroxy-2-cyclopentenones.

摘要

A process for producing a compound of the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="24" wi="62" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R, is a hydrogen atom, an alkyl group or an alkenyl group and R<Sub>2</Sub> is an alkyl group, an alkenyl group or an alkynyl group, which comprises treating a compound of the formula:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="28" wi="61" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R, and R<Sub>2</Sub> are each as defined above and R is a hydrogen atom or a lower alkyl group in the presence of an acidic substance and water.