Nomenclature of saturated aliphatic hetrocyclic amines with an alkyl group on the nitrogen
According to Subsection P-22.2.1 of the current version of Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book), the preferred IUPAC name (PIN) of the functional parent compound is the retained name ‘pyrrolidine’, the nitrogen atom being numbered ‘1’.



Therefore, the name of the compound given in the question is ‘1-propylpyrrolidine’.