Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A series of arylpiperazines were synthesized in moderate to good yields by palladium-catalyzed coupling reaction of aryl halides with unprotected piperazines. Very high regioselectivities were observed when using 2-methyl or 2,6-dimethylpiperazine. ... A series of arylpiperazines ...