The synthesis of aryl 4-nitro-5-imidazolyl sulfone radiation sensitizers sterically protected against glutathione reaction
作者:Roger A. Egolf、Ned D. Heindel
DOI:10.1002/jhet.5570280307
日期:1991.4
6-Disubstituted aryl 1-methyl-4-nitro-5-imidazolyl sulfones 4 and aryl 1-neopentyl-2-tert-butyl-4-nitro-5-imidazolyl sulfones 10 have been synthesized and tested as radiationsensitizers of hypoxic carcinoma cells. These sterically crowded imidazoles show decreased displacement reactivity with glutathione at C-5, a major metabolic reaction known to deplete effective plasma drug levels in traditional aryl imidazolyl
Effect of Liposome and Cyclodextrin Entrapment on Retardation of Glutathione Decomposition of Nitroimidazolyl Sulfones
作者:Ned D. Heindel、Roger A. Egolf、James S. Stefely
DOI:10.1002/jps.2600791003
日期:1990.10
pharmaceuticals derived from 4-nitro-5-imidazolyl sulfones has its clinical potential compromised by a metabolic reaction with plasma glutathione which leads to a much less active metabolite. Entrapment of two members of the class in three different liposomes, one polymerized liposome, and a beta-cyclodextrin system has shown that this glutathione condensation can be suppressed by a rate factor of