13C-NMR Assignments for Methyls and Quaternary Carbons of the Limonoid Obacunone

Autor: Rugutt, Joseph, Fischer, Nikolaus, Nauman, Marcus, Schmidt, Thomas, Berner, Dana
Zdroj: Spectroscopy Letters; June 1996, Vol. 29 Issue: 4 p711-726, 16p
Abstrakt: The high field 1H and 13C resonances of obacunone were established by a series of I D and 2D NMR experiments. The 13C-NMR signals of the five tertiary methyl groups and all quatenary carbons were unambiguously assigned. The results confirm the stereochemical assignments at all stereogenic centres.
Databáze: Supplemental Index