5-Alkylidene-2-halo-4-substituted-2-cyclopentenone and process for production thereof.

摘要

Novel 5-alkylidene-2-halo-4-substituted-2- cyclopentenone and process for production thereof. The novel 5-alkylidene-2-halo-4-substituted-2-cyclopentenones are represented by the following formula (I):
<Chemistry id="chema01" num="0001"><Image id="ia01" he="25" wi="53" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein Ra represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 12 carbon atoms or a substituted or unsubstituted phenyl group, R<Sub>b</Sub> represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 12 carbon atoms, and X represents a halogen atom. The novel cyclopentenones possess excellent pharmaceutical activities including anti-tumor activity, antiviral activity and antimicrobial activity.