By A. Braibanti (auth.), A. Braibanti (eds.)
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Extra resources for Bioenergetics and Thermodynamics: Model Systems: Synthetic and Natural Chelates and Macrocycles as Models for Biological and Pharmaceutical Studies
Amer. Chern. Soc. 92, pp. 6811-6818. : 1973, in Inorganic Biochemistry, Ed. L. Eichorn, Vol. 1, pp. 121-166, Elsevier Publisher, New York. , Jr. : 1967, J. Biol. Chern. 242, pp. 1574-1578. : 1976, Res. Corm. Chern. Path. & Pharmaco l. 14·, pp. 153-165. E. : 1975, J. Amer. Chern. Soc. 97, pp. 2381-2390. S. : 1971, J. Chern. Soc. A, p. 2527 and references therein. : 1977, A Report on Nickel, Published by the University of Stockholm, Institute of Physics. C. : 1973, The Current Status of Nickel Carcinogenes.
Ok.. N ~0 VJ FIGURE 6 Later, a series of compounds presenting the same general topology and nitrogen and oxygen atoms as binding sites were prepared (19); the size of the two monocyclic subunits and the length of the linking bridges can be varied at will. In order to complex two transition metals in the same molecule, oxygen was replaced by sulfur (20). The synthesis of sulfur containing macrotricyclic ligands is presented in Figure 7. FIGURE ? DESIGN AND SYNTHESIS OF LIGANDS 39 The synthetic route can be choosen in order to introduce either different macrocyclic subunits, the two bridges being the same (as exemplified in Figure 7) or different linking bridges, the two monocyclic subunits being identical.
SAUVAGE 36 This synthetic route and chemical steps leading to macrobicyclic compounds have been widely used for preparing other related compounds (10 - 12). Len~hening the bridges of the macrobicyc1ic systems from [! :iJ to . 8 ! diameter. The lipophilicity of the ligand can be adjusted at will by the introduction of aromatic rings or of aliphatic chains (13),(14) in the organic skeleton surrounding the complexation site. A few cryptands presenting a lipophilic character are presented in Figure 3.
Bioenergetics and Thermodynamics: Model Systems: Synthetic and Natural Chelates and Macrocycles as Models for Biological and Pharmaceutical Studies by A. Braibanti (auth.), A. Braibanti (eds.)