Di-[2-(2,3-dichlorophenyl)aminoethyl]amine is prepared from 1-Bromo-2,3-dichlorobenzene(B687435) and Diethylenetriamine (D444255). 1-Bromo-2,3-dichlorobenzene is a reagent used in the preparation of selective nonpeptidic inhibitors of striatal-enriched protein tryosine phosphatase.