How is (2R)-1-(1-Benzofuran-2-yl)-N-propyl-2-pentanamine (CAS: 260550-89-8) typically synthesized?

This compound is typically synthesized via a multi-step process involving the coupling of propylamine with 2-(3-aminopropyl)benzofuran, followed by amination. The synthesis involves the use of a catalyst such as triphenylphosphine and a coupling reagent like DCC (dicyclohexylcarbodiimide). The reaction is carried out in an organic solvent, and the product is isolated by column chromatography.