How is 3-(3-Ethyl-1-methyl-3-azepanyl)phenol hydrochloride (CAS: 59263-76-2) typically synthesized?

3-(3-Ethyl-1-methyl-3-azepanyl)phenol hydrochloride (CAS: 59263-76-2) can be synthesized via a multi-step process. Starting from 3-azepanone, it is reacted with ethyl bromide and methyl bromide to form the desired azepanyl derivative. This intermediate is then coupled with phenol to form the phenolic compound, which is subsequently protonated to its hydrochloride salt with a yield of around 85%.