How is (6R)-6-[2-(Ethyl{4-[2-(ethylamino)ethyl]benzyl}amino)-4-methoxyphenyl]-5,6,7,8-tetrahydro-2-naphthalenol (CAS: 722533-56-4) typically synthesized?

This compound is synthesized via a multi-step process involving coupling reactions, aminations, and hydrolysis. Key steps include the synthesis of a benzyl ethylamine intermediate, followed by its coupling with a 4-methoxyaniline derivative. The reaction is catalyzed by palladium under mild conditions, with yields typically ranging from 60% to 75%.