The synthesis of a series of 2,2-disubstituted-5-cyanocyclopentanones by hydrolysis of the precursor 3,3-disubstituted-2-amino-1-cyanocyclopentenes (2,2-disubstituted-5-cyanocyclopentanoneimines) is described. The new compounds possess the following substituants: dimethyl, diethyl, phenyl hydrogen, and ethyl phenyl.