Three d e u t e r i u m l a b e l l e d drugs, 5-ethyl-d,-5-phenylthiobarbit u r i c a c i d , p r i m i d o n e -e t h y l -L 5 , and p h e n o b a r b i t a l -e t h y l -d 5 , have been p r e p a r e d employing a t h r e e s t e p s y n t h e s i s u t i l i z i n g d i e t h y l phenylmalonate
A synthesis of 5-phenyl-d5-phenyl-d5-hydantoin
✍ Scribed by Brian D. Andresen; K. Biemann
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- French
- Weight
- 368 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
The drug 5-phenyl-5-phenyl -d -hydantoin was prepared employing a f i v e step synthesis starting%m readily available benzene-&.
Two key intermediates, benzoin-d , and benzil-&, were prepared, containing only one f u l l y l a b e d d phenyl-d group. The precursor benzll-d was condensed w i t h urea t o generde the labelled drug, dipheny4ydantoin-3. This new probe possesses only one f u l l y labelled phenyl group making i t suitable f o r metabolic studies and as an internal standard f o r c d i n e d GC-MS-conputer analyses o f body f l u i d extracts. Synthetic procedures as well as complete spectral data o f precursors and the labelled drug are presented.
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## Abstract The synthesis of 2‐ethyl‐2‐phenyl‐d~5~‐glutarimide (glutethimide‐d~5~) and its mass fragmentometry is described.
Losungsmittel als Hauptreaktion, so ist eine, um mindestens eine Zehnerpotenz hohere, Verdunnung notwendig als in wassrigen Alkoholen unter vergleichbaren Bedingungen. Die Ringschlussreaktion wird also in wassrigen Alkoholen durch dns Losungsmittel spezif i s c h begunstigt. 7. Die Genauigkeit der