A synthesis of the title compound from /13Clparaformaldehyde and [15N)ammonium chloride V f 8 ethyl 2-(1 ,3-/2-13Cldithianyl) acetate 3a is described. Ethyl/3-13C13-oxopropanoate derived in sl'tu from 3a was converted by a stepwise Strecker procedure to DL-[ 2-13C,15Nlaspartic acid 7a.
Synthesis of D,L-[2-15N,5-13C]glutamic acid
โ Scribed by John C. Laiuppa; David M. Lemaster
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- French
- Weight
- 281 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0022-2135
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โฆ Synopsis
Abstract
A oneโpot procedure is described for the synthesis of D,Lโ[2โ^15^N,5โ^13^C]glutamic acid from 2โbromoโ4โbutyrolactone utilizing potassium ^15^Nโphthalimide and potassium ^13^Cโcyanide as label sources. Following a two column purification procedure, the final product is obtained in 38% yield based on the equimolar label sources.
๐ SIMILAR VOLUMES
## Abstract 5โ[4โ^13^C,^15^N]โ and 5โ[5โ^13^C,^15^N]Aminolevulinic acid (ALA) were simply synthesized in four steps by the condensation of [1โ^13^C,^15^N]โ or [2โ^13^C,^15^N]glycine, respectively, with phthalic anhydride, followed by conversion to the chloride, coupling reaction with a threeโcarbon
l-[4-l3 C]Glutamic acid (1) and l-[4-13 C]glutamine (2) were synthesized from sodium [2-13 C]acetate (5) and Dellaria's oxazinone 3 as a chiral glycine equivalent. Sodium [2-13 C]acetate (5) was converted to [2-13 C]acrylate 4. Diastereoselective Michael addition of the enolate of 3 to the acrylate
## 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
## Abstract We have developed a stereospecific chemomicrobiological synthesis of labeled tryptophan. Lโ[3โ^13^C]Serine, [1โ^15^N]โ and [2โ^13^C]indole were used as precursors for the synthesis of Lโ[ฮฒโ^13^C]โ, Lโ[1โฒโ^15^N]โ, and Lโ[2โฒโ^13^C]tryptophan, respectively. The labeled precursors were inco