​The acidity of α-H atoms in Ethyl Acetoacetate

​Due to the presence of the Electron withdrawing group, the EWG Methylene group is present in between the two electron group the hydrogen bond bonded to carbon become weak. Due to weak-boned hydrogen, it is easily deprotonated from the methylene group. Therefore it acts as acidic—the extent of methylene proton acidity depends on the attaching group's nature.

When two moles of ethylacetate  react with Ethoxide (NaOH+ EtOH= NaOEt), it underwent self condensation reaction, followed by acidification give raised to corresponding β-Ketoester​

​Claisen condensation Reaction Mechanism

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