## Abstract Tritium labelled amitriptyline (__1__) of high specific activity was prepared. The tritium was incorporated by catalysed isotope exchange into the precursor dibenzosuberone, which had been previously converted into a cyclic ketal, in order to protect the oxoโgroup against reduction. It
Radiosynthesis of high specific activity tritium-labeled precocene II
โ Scribed by William S. Bowers; Lothar Franke; David M. Soderlund
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- French
- Weight
- 244 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
โฆ Synopsis
The i n s e c t a n t i j u v e n i l e hormone precocene I1 (6,7-dimethoxy-2,2dimethylchrornene) was r a d i o s y n t h e s i z e d , i n c o r p o r a t i n g t r i t i u m s p e c i f i c a l l y i n t h e gem-dimethyl group a t h i g h s p e c i f i c a c t i v i t y .
Hydroxycoumarin was methylated (CH I / K O H ) and t h e n o x i d i z e d a t 6p o s i t i o n (K2S208/NaOH).
๐ SIMILAR VOLUMES
Since its introduction to medicine several years ago, diphenylhydantoin (DPH) has been widely used in the treatment of epilespy, both in adults and children.( 2) The effects of the drug is well correlated with the plasma levels. high levels have adverse effects. ( 3 )
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Synthesis of v e r a t r i d i n e labeled with tritium on t h e aromatic residue a t p o s i t i o n 5' i s described. F i r s t , a precursor bromoveratridine, 3-(5-bromoveratroyl) veracevine, was prepared which was converted i n t o t h e labeled v e r a t r i d i n e by cata l y t i c dehalogena
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## Abstract The possibilities of tritium labelling of tofizopam (**1**) at high specific activity were investigated. Two methods, one by isotopic exchange, and one by catalysed halogenโtritium replacement were developed. The latter was found to be more rational, and **1** specifically labelled with