[99mTcN(PNP5)(DTC)]+[PNP5:bis(dimethoxypropylphosphinoethyl)-ethoxyethylamine,DTC:dithiocarbamate] heterocomplexes can be viewed as resulting from the selective coupling of the metal fragment [99mTcN(PNP5)]2+ with the bidentate dithiocarbamate π-donor ligand,and these complexes have attractive potential for myocardial perfusion imaging agents.In this article,PNP5 hydrochloride was synthesized from 2-ethoxyethylamine and 3-chloro-1-propanol through seven steps successively,in which the last two steps were th...