title: Iodoacetylated ouabagenins: their syntheses, spectroscopic characterizations, and stability studies.
abstract: Ouabain shows high binding ability to myocardial Na+,K(+)-ATPase and, therefore, a suitably radiolabeled derivative of this compound may find use in myocardial imaging. In this pilot experiment we report the preparation of several chloroacetylated and iodoacetylated ouabagenins. These intermediates may possess the potential for conversion to 99mTc-labeled tracer by a reported procedure with which the imaging of myocardial Na+,K(+)-ATPase may be possible. Appropriate analytical and spectroscopic data for these intermediates are reported for the first time. To determine the stability of the iodoacetylated ouabagenins, corresponding 131I derivatives were synthesized which showed sufficient stability for incorporating a suitable radiometal-binding chelating moiety to these steroid molecules.
authors.affiliation: Nuclear Medicine Division, Indian Institute of Chemical Biology, Calcutta.
authors.forename: M
authors.initials: M
authors.lastname: Chatterjee
authors.forename: A K
authors.initials: AK
authors.lastname: Chakravarty
authors.forename: S
authors.initials: S
authors.lastname: Ganguly
authors.forename: B R
authors.initials: BR
authors.lastname: Sarkar
authors.forename: S
authors.initials: S
authors.lastname: Banerjee
mesh_terms: D000107:Acetylation; D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D007457:Iodine Radioisotopes; D007553:Isotope Labeling; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009206:Myocardium / Q000201:enzymology; D010042:Ouabain / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism
chemical_list: D007457:Iodine Radioisotopes; D010042:Ouabain; D000254:Sodium-Potassium-Exchanging ATPase; C008721:ouabagenin