Preparation of NG-monoethyl-l-arginine
✍ Scribed by Yung-Bong Cho; George Furst; Woon Ki Paik
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 412 KB
- Volume
- 139
- Category
- Article
- ISSN
- 0003-2697
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✦ Synopsis
NG-Monoethyl-L-arginine, a putative in vivo product after administration of the potent hepatocarcinogen L-ethionine to rats, has been chemically synthesized by coupling N-ethyl, S- methylthiopseudouronium iodide with alpha-amino-blocked L-ornithine. The structure of the compound as NG-monoethyl-L-arginine was confirmed by 13C NMR. Its elution time on an automatic amino acid analyzer, Rf values using thin-layer chromatography, and isoelectric point have been compared with those of NG-monomethyl-L-arginine.
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NG-Monomethylagmatine, a decarboxylation product of NG-monomethyl-L-arginine, has been synthesized by reacting putrescine with N,S-dimethylthiopseudouronium iodide. The structural identity of the product was confirmed by proton NMR and mass spectroscopy, and its properties were determined on thin-la
## Abstract N^G^‐Mono[^14^C‐methyl]‐L‐arginine was prepared in a two‐step synthesis. N,S‐dimethylthiopseudouronium iodide [methyl‐^14^C] was prepared in excellent yield and afforded the labelled amino acid on coupling with L‐ornithine.
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