New Synthesis of 2-Substituted Cyclopentane-1, 3-dione

Abstract

2-Methyl, 2-propyl and 2-phenethylcyclopentane-1, 3-dione (III) were prepared by the catalytic hydrogenation of the corresponding 2-(α-ethoxyalkylidene) cyclopent-4-ene-1, 3-diones, (II), which were obtained by the condensation of cyclopent-4-ene-1, 3-dione (I) and ethyl ester of ortho acids.