By reaction of 1-(3-chloro-2-hydroxypropyl)-4-(2-methoxyphenyl)piperazine (III), obtained from 2-methoxyphenylpiperazine (I) and epichlorohydrine (II), with the sodium salt of 3,4,5-trimethoxyphenol (IV) in refluxing dioxane.
By reaction of 3,4,5-trimethoxyphenoxyglycidylether (VI) [obtained by reaction of 3,4,5-trimethoxyphenol (V) with epichlorohydrine (II)] with 1-(2-methoxyphenyl)piperazine (I) in refluxing isopropanol.