How is 1,3-Diaminopropan (CAS: 109-76-2) typically synthesized?

1,3-Diaminopropan (CAS: 109-76-2) is typically synthesized via the catalytic reduction of propionaldehyde using hydrogen gas over a metal catalyst, such as palladium on carbon. Another method involves the direct amination of propionaldehyde with ammonia in the presence of an acid catalyst. These processes yield high purity and selectivity, with good yields of the target compound.