Cyclopentyl n-decanoate and n-butyl cyclopentanecarboxylate were converted into ketones over heterogeneous catalyst. The transformations proceeded as parallel ones: through beta-ketoesters with simultaneous thermal decomposition (retro-Tishchenko reaction) and secondary condensation of the resultant aldehydes. The path from esters to ketones from acidic ester sides is shorter than the one from alcohol ester sides. The mutual proportions of ketones depend also on the control parameters.