Synthesis and Characterization of Novel Chiral 1,2,3,4-tetrasubstituted Imidazolidines Derived from rac-1,2-propanediamine

Herein, we describe the synthesis of a series of rac-N,N'-dibenzylpropane-2-aryl-substituted imidazolidines prepared from the corresponding aromatic aldehydes and two N,N'-dibenzylpropane-1,2-diamines, namely rac-N,N'-dibenzylpropane-1,2-diamine 3a and rac-2,2'-[propane-1,2-diylbis(iminomethanediyl)]diphenol 3b, produced by the NaBH4 reduction of the corresponding diimines of benzaldehyde and salicylaldehyde.