A synthesis of 3-cyano-4-methyl-5 ( 14 C)-methyl-2-(5-14C)pyrrolyloxamic acid is described. The compound, having specific activity of 66.7 pCi/mmole, was obtained in 19.68% overall yield from uniformly labelled 14C-l-alanine. 14 14 Key Words: 3-Cyano-4-methyl-5( C)-methyl-2-(5-C)pyrrolyloxamic acid,
Synthesis of 2,4′,5-trichloro [14C]biphenyl mercapturic acids
✍ Scribed by Ake Bergman; Jerome E. Bakke; Vernon J. Feil
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- French
- Weight
- 286 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
The synthesis of 3-and 4-S-(N-acetyl)cysteinyl-2,4' ,5-tri~hloro?~CJbiphenyl is described. 4-ChloroC Claniline was used as starting material. The products were obtained after an aryl coupling of the amine with 2,5-dichloronitrobenzene, a reduction of the nitrogroup and finally coupling of the diazotized trichlorobiphenyl m i n e with cuprous N-acetylcysteine mercaptide.
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Specifically labelled phenylacetic acid and mandelic acid derivatives, metabolites of L-Dopa, have been synthesized via the intermediary labelled benzyl alcohols, which were prepared by reduction of the methyl esters of the appropriate benzoic acids. The benzyl alcohols have been converted to the co
## Abstract [2‐^14^C]1,3,7,9‐, 0(2),1,7,9‐ and 0(8),1,3,7‐Tetramethyluric acid were prepared by methylation of [2‐^14^C]uric acid with dimethyl sulfate at pH 9. The yield after repeated (3x) purification by TLC was 44.9%, 4.4% and 6.3% respectively.
## Abstract A versatile method for ^14^C labeling of 2‐methoxypyrimidine‐5‐carboxylic acid at the 2‐position has been developed after encountering difficulties with traditional approaches to label the carboxyl function. The method developed can also be used for ^14^C labeling other positions of the