## Abstract 2,2′,5′,2″– [2′,5′ – ^14^C~2~] Terthienyl and 1,4–Bis (2–Thienl) [1,4–^14^C~2~] butadiyne were synthesized from [14~C~] formic acid.
Synthesis of 2-(2,4-difluorophenyl)-4,5-BI-(4-methoxyphenyl) [2-14C] imidazole
✍ Scribed by P. W. Scott; D. R. Hawkins
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- French
- Weight
- 230 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The synthesis of 2‐(2,4‐difluorophenyl)‐4,5‐bis(4‐methoxyphenyl)imidazole labelled with carbon‐14 in the 2‐position of the imidazole ring has been achieved in four stages starting from barium [^14^C] carbonate via 2,4‐difluoro‐[carboxyl]^14^C benzoic acid and the corresponding aldehyde. The overall radiochemical yield was 20% and the product obtained with a radiochemical purity in excess of 99% by the analytical systems used.
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A one-pot synthesis of 3-(l-methylethyl)-2-(4-methoxyphenyl)-3H-naphth [1,2-d] [ 2 -C] imidazole (i), a nonacidic antiinflammatory and analgesic agent, is described. The starting material, 2-isopropylamino-1-nitronaphthalene ( 3 ) was hydrogenated, the resulting diamine (4) reacted with p-[carbonyl-
## Abstract 2,3‐Bis(p‐methoxyphenyl)indole‐2‐^14^C was prepared at a specific activity of 1.71 mCi/mM from Ba^14^CO~3~ by a 4‐step synthetic sequence in 23% overall radiochemical yield.