Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.276, 85-90, 1996
Synthesis of Structurally Reinforced Chiral Macro-Cyclic Polyamines and Their Metal-Complexes
Two structurally reinforced chiral 15-membered azamacrocycles (2S, 14S)-2,14-diisobutyl-10-methyl-1,4,7,10,13-pentaazabicydo[11.2.2]heptadecane and (2S,14S)-2,14-diisobutyl-7,10-dimethyl-1,4,7,10,13- pentaazabicyclo[11.2.2] heptadecane as a new type of ligand were conveniently synthesized by LiAlH4 reduction from their corresponding macrocyclic pseudopeptides cyclo[(2S,3’S)-2-(3’-isobutyl-2’ -oxopiperazine-1’-yl)-4-methyl-pentanoyl-glycyl-glycyl-sarcosyl] and cyclo[(2S,3’S)-2-(3’-isobutyl-2’-oxopiperazine-1’-yl)-4-methyl-pentanoyl-glycyl-sarcosyl-sarcosyl], respectively. Their copper(II) complexes were also prepared and characterized.