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An asymmetric synthesis of l-[3-13C]alanine

✍ Scribed by Kazuhiko Takatori; Sanae Toyama; Shoko Narumi; Seishiro Fujii; Masahiro Kajiwara


Publisher
John Wiley and Sons
Year
2004
Tongue
French
Weight
81 KB
Volume
47
Category
Article
ISSN
0022-2135

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✦ Synopsis


Abstract

l‐[3‐^13^C]Alanine was synthesized from [^13^C]methyl iodide by using Dellaria's oxazinone, prepared from phenyl[2‐^13^C]bromoacetate and (S)‐2‐phenylglycinol, as a chiral glycine equivalent. Alkylation of the oxazinone with [^13^C]methyl iodide was achieved with high diastereoselectivity. Hydrolysis and removal of the chiral auxiliary of the alkylated oxazinone gave l‐[3‐^13^C]alanine. Copyright Β© 2003 John Wiley & Sons, Ltd.


πŸ“œ SIMILAR VOLUMES


Preparation of D- and L-Alanine-2,3-13C2
✍ Vernon N. Kerr; Donald G. Ott πŸ“‚ Article πŸ“… 1978 πŸ› John Wiley and Sons 🌐 French βš– 265 KB

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The asymmetric peak heights observed in the 13C triplet signals, caused by the 13C-14N dipolar interaction, of the C-a nucleus in L-alanine can he explained by the fact that a given 'H decoupliig frequency cannot simultaneously fulfill the 'on-resonance' condition for each of the three 'H resonances

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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