How is cyclohexane-1,4-diamine (CAS: 3114-70-3) typically synthesized?

Cyclohexane-1,4-diamine can be synthesized via the reaction of cyclohexylamine with hydrochloric acid to form the corresponding chloride, which is then reduced using hydrogen gas in the presence of a catalyst like palladium on carbon. Alternatively, it can be prepared by the reduction of 1,4-dibromocyclohexane using sodium borohydride or other reducing agents.