Synthesis and characterization of novel platinum(IV) complexes with functionalized carbohydrates
作者:Henrik Junicke、Yvonne Arendt、Dirk Steinborn
DOI:10.1016/s0020-1693(00)00092-x
日期:2000.6
[PtMe3(H2O)(2)}(2)SO4] (1) reacts with 1-amino-1-deoxy-D-glucitol (C2), 1-(N-methylamino)-1-deoxy-D-glucitol (C3) and 2-amino-2-deoxy-alpha-D-glucose (C4) in diluted aqueous solution to give platinum(IV) carbohydrate complexes of the type [PtMe3L](2)SO4 (2, L = C2; 3, L = C3; 4, L = C4). The complexes were characterized by microanalysis, H-1, C-13 and Pt-195 NMR spectroscopy. In aqueous solution the amino glucitols in 2 and 3 are tridentately (kappa(3)N,O-2,O-4) Or bidentately (kappa(2)N,O-2) coordinated by replacing the C4-OH ligand by water. [PtMe3(H2O)(2)}(2)SO4] (1) reacts with stoichiometric amounts of sodium 2-amino-2-deoxy-D-gluconate (C5Na), sodium D-gluconate (C6Na) and calcium O-isopropylidene-D-threonate (C7Ca) to give complexes of the type [PtMe3L] (5, L = C5; 6, L = C6) and [PtMe3L(H2O)] (7, L = C7), respectively. The complexes were isolated as colorless, air-stable powders and fully characterized by microanalysis,H-1, C-13 and Pt-195 NMR spectroscopy. The ligands in 5-7 are deprotonated sugar acids that are facial tridentately (kappa(3)O(1,4),N-2 5; kappa(3)O(1,2,4) 6) and bidentately (kappa(2)O(1,2) 7) coordinated, respectively. In aqueous solutions of 5 and 6 water may be coordinated at platinum instead of the hydroxyl group at C4. (C) 2000 Elsevier Science S.A. All rights reserved.