๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Radiosynthesis of high specific activity tritium-labeled precocene II

โœ 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

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โœฆ 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).


๐Ÿ“œ SIMILAR VOLUMES


Tritium labelled compounds of high speci
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## 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 oxoโ€group against reduction. It

Preparation of tritium labeled diphenylh
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Synthesis of high specific activity trit
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The tobacco smoke p a r t i c u l a t e phase marker d o t r i a c o n t a n e was l a b e l l e d w i t h tritium a t p o s i t i o n s 15, 16, 1 7 and 18 by t h e c a t a l y t i c r e d u c t i o n of dotriaconta-15, 17-diyne. This was obtained by o x i d a t i v e l y coupling hexadec-1-yne, i n

Synthesis of tritium labeled veratridine
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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

High specific activity tritium labelled
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Through t h e u s e of an o-(o-iodobenzoyl) ecgonine d e r i v a t i v e (2), t r i t i u m l a b e l l e d 0-benzovl ecgonine has been prepared, by c a t a l y t i c hydrogenolysis, i n s u f f i c i e n t l y high s p e c i f i c a c t i v i t y f o r use i n radioimmunoassay s t u d i e s f o r

Tritium labelled compounds of high speci
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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 halogenโ€tritium replacement were developed. The latter was found to be more rational, and **1** specifically labelled with