## Abstract Tritiated dextran and inulin were prepared by both a catalytic solid state and a liquid phase isotope exchange with gaseous tritium. The liquid phase procedure is convenient for preparation of the polysaccharides with specific activities up to 5 mCi/g, while the solid state procedure al
Preparation of tritium-labeled diosgenin, esmilagenin and tigogenin
β Scribed by Joseph L. Rabinowitz; Juarez-Oropeza; Juan C. Diaz Zagoya
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- French
- Weight
- 135 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0022-2135
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Tritiated N-chloracetyl-DL-phenylalanine, obtained by reduction of the N-chloracetyl-dehydrophenylalanine with tritiated hydrogen, is hydrolysed by carboxypeptidase A . The method gives L-phenyl-al~nine-2,3-~H of high optical purity and with any specific activity up to 60 curies per millimole.
## Abstract A method for preparing tritiumβlabelled ryanodine is described. The alkaloid was first brominated, and the bromoryanodines were separated from the reaction mixture by thin layer chromatography; NMR analysis at this stage showed substitution of pyrrole protons by bromine. Bromoryanodine
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