Abstract: Process for the preparation of (S)-(?)-?-ethyl-2-oxo-1-pyrrolidineacetamide of Formula (I) by the steps of condensation of (S)-2-amino butanol of Formula (II) and 4-halobutryl chloride, where halo group can be chloro, bromo or iodo in solvents to form ?-ethyl-2-oxo pyrrolidine ethanol of Formula (III); oxidation of (S)-?-ethyl-2-oxo pyrrolidine ethanol to yield (S)-?-ethyl-2-oxo pyrrolidine acetic acid having the formula (IV); esterification of (S)-?-ethyl-2-oxo pyrrolidine acetic acid (IV) with an alcohol to provide alkyl ester of Formula (V) wherein, R is 14 Carbon atom; ammonolysis of alkyl esters of formula (V) with ammonia to provide (S)-(?)—?-ethyl-2-oxo-1-pyrrolidine acetamide of formula (1).