Synthesizing method of ethyl 2-oxocyclopentylacetate

The invention discloses a synthesizing method of ethyl 2-oxocyclopentylacetate and belongs to the technical field of organic synthesizing. Diethyl adipate is used as raw material, and condensation, substitution, hydrolysis decarboxylation and esterification are performed to obtain ethyl 2-oxocyclopentylacetate. Sodium is dissolved into excessive anhydrous ethanol to form the ethanol liquid of sodium ethoxide, the ethanol liquid of the sodium ethoxide is allowed for standing to reach room temperature, then zirconium dioxide is added to catalyze the cyclization reaction of the diethyl adipate, and lithium chloride is added to catalyze the esterification reaction. The synthesizing method has the advantages that reaction conditions and reaction process are optimized, reaction time is shortened, use of toluene solvent and anhydrous ethanol is reduced, the reaction conditions are mild, yield is increased, process cost is lowered at the same time, and high economic benefits are achieved.