Ortho-and para-f luoro-a-methylstyrenes specifically 14C-labelled in all three positionsof the side chain have been synthesized by a modified Wittig reaction. synthesized as intermediates. The yields in all cases were good and any radiochemical impurities could be readily removed by careful fraction
✦ LIBER ✦
Synthesis of isotopomers ofl-DOPA and dopamine labeled with hydrogen isotopes in the side chain
✍ Scribed by M. Pająk; M. Kańska
- Publisher
- Springer
- Year
- 2009
- Tongue
- English
- Weight
- 214 KB
- Volume
- 281
- Category
- Article
- ISSN
- 1588-2780
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## Abstract Solid‐state NMR spectroscopy was applied to the analysis of melanins prepared by peroxidase‐H~2~O~2~ oxidation of dopamines specifically ^13^C labelled in the α‐ or β‐side chain positions. A surprisingly diverse pattern of signals indicated the presence of uncyclized dopamine and noradr