## The t i t l e compound was prepared i n three steps w i t h 55% overall y i e l d s t a r t i n g from potassium (lSN)phthal imide. The synthetic rout e involved reaction w i t h 1,2-dibromoethane, hydrolysis of the res u l t i n g N-(2-br0moethyl)(~~N)phtha7imide w i t h HBr and treatment of the
Synthesis of 15N,15N-imidazoleacetic acid
โ Scribed by George D. Prell
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 301 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2135
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โฆ Synopsis
S u in ma r y
1sN.15N-imidazoleacetic acid was synthesized from 15N, lSN-DL-histidine (>99 atom % 15N). The latter. oxidized with sodium hypochlorite. formed 15N.15N-imidazoleacetoniuile. The free acid was prepared after acid hydrolysis of the nitrile, elution from an anion exchange column with acetic acid, then drying. Formation of by-product(s). produced when other methods were used, and which may conraminate some commercial sources of imidazoleacetic acid. was avoided with this method.
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Coniine-15N was obtained by the reductive amination of 5-0x0octanal using sodium cyanoborohydride and a m m o n i ~m -~~N bromide. Nornicotine-l'-15N resulted from a similar reductive aminution of 4-oxo-4-(3'-pyridyl)butanal. Merhybtion with formaldehyde and ,formic acid afforded n i ~o t i n e -I '
## Abstract The production of Lโglutamic acidโ^15^N in good yield by direct enzymic synthesis from 2โoxoglutaric acid, ammonium chlorideโ^15^N (95 atom % ^15^N) and reduced nicotinamide adenine dinucleotide phosphate (NADPH) is described. The NADPH is continuously regenerated by coupling the first
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