Drug – bio-affecting and body treating compositions – Radionuclide or intended radionuclide containing; adjuvant... – Molecular bilayer structure
Patent
1975-01-14
1977-05-03
Gotts, Lewis
Drug, bio-affecting and body treating compositions
Radionuclide or intended radionuclide containing; adjuvant...
Molecular bilayer structure
536 7, 424182, A61K 4300
Patent
active
040215350
ABSTRACT:
The derivatives of digoxin useful in the radioimmunoassay of digoxin having the following formulae: ##STR1## where R is a carboxylic acid ester. These derivatives are formed by the following process: (1) reacting the carboxylic acid in the presence of trifluoroacetic anhydride with a solution of digoxin in an inert, nonaqueous solvent medium, (2) adding water so as to form the above derivatives, (3) purifying the above derivatives from other constituents of the reaction mixture and (4) radio-labeling these derivatives for use as a labeled hapten in the radioimmunoassay of digoxin.
The preferred carboxylic acids are imidazoleacetic acid and p-hydroxyphenylpropionic acid. The preferred radioactive isotope is .sup.125 I.
REFERENCES:
patent: 3471470 (1969-10-01), Heider et al.
patent: 3753975 (1973-08-01), Kaiser et al.
patent: 3804825 (1974-04-01), Losel et al.
British Medical Bulletin, Hunter, W. M., "Prep. and Assessment of Radioactive Tracers," vol. 30, No. 1, 1974, pp. 18-23.
".sup.125 I and .sup.3 H Radioimmunoassay Kits For Digoxin and Digitoxin," Schwart/Mann Flyer, Aug. 1973.
Fieser, et al., "Reagents for Org. Syn." Wiley and Sons, Inc., 1967, p. 1223.
Beckman Instruments Inc.
Gotts Lewis
Owens Cary
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