Carbon-13 nuclear magnetic resonance assignments and spectral characteristics for some pavine alkaloids.
Detailed 13C-NMR spectral assignments were made for some pavine alkaloids isolated from Cryptocarya chinensis, including (-)-crychine (1), (-)-caryachine (2), and (+)-O-methylcaryachine (3), and neocaryachine (4). The assignments were based on detailed analysis of 1H NMR, 13C NMR, heteronuclear 1H-13C COSY, both one-bond and long-range correlations, and cross comparisons with model compounds. Substituent effects on the chemical shifts of the N-methylpavinane skeleton were analyzed in view of their utility in structural elucidation.
Lee
S S
SS
Liu
Y C
YC
Chen
C H
CH
D000470:Alkaloids / Q000032:analysis*; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D009682:Magnetic Resonance Spectroscopy
D000470:Alkaloids; D002247:Carbon Isotopes