Adinazolam mesylate labeled with stable isotopes was synthesized for conducting bioavailability studies. Adinazolam labeled uniformly with carbon-13, >99% enrichment, in the unsubstituted phenyl ring was prepared for administration as drug. In addition, adinazolam was also dual-labeled with carbon-1
Synthesis of multiply deuterium-labelled prednisone and prednisolone
β Scribed by Hiromi Shibasaki; Takashi Furuta; Yasuji Kasuya
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 332 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2135
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β¦ Synopsis
Abstract
We have synthesised prednisone and prednisolone labelled with four deuterium atoms at chemically stable sites ([1,19,19,19β^2^H~4~]prednisone and [1,19,19,19β^2^H~4~]prednisolone), starting from [1,1,19,19,19β^2^H~5~]cortisone. The isotopic purities were demonstrated to be > 98 atom%. There were no indications of deuterium loss from the Cβ19 and Cβ1 positions during the synthetic sequence involving an oxidation reaction step using selenium dioxide in tertβbutanol.
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