Steroidal alkaloids from Solanum khasian um: Application of 13C NMR spectroscopy to their structural elucidation

Synthesis of Dopamines Labelled with13C

Synthesis of Dopamines Labelled with13C in the α- or β-Side Chain Position and Their Application to Structural Studies on Melanins by Solid-State NMR Spectroscopy

✍ Crescenzi, Orlando ;Kroesche, Christoph ;Hoffbauer, Wilfried ;Jansen, Martin ;Na 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 530 KB

## 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