... DOI: 10.1039/B611034G (Paper) Dalton Trans., 2006, 5630-5640. ... 3,5-Me 2 pz(CH 2 ) 2 NH(CH 2 ) 2 NH(CH 2 ) 2 NH 2 (1) has been prepared by two different synthetic approaches (Scheme 1). One of these approaches consisted of reacting N-(2-p-toluenesulfonylethyl)-3 ...