13C Nuclear magnetic resonance spectroscopy of 4-methylcoumarins (4-methyl-2H-1-benzopyran-2-ones)
作者:V. S. Parmar、S. Singh、P. M. Boll
DOI:10.1002/mrc.1260260515
日期:1988.5
The 13C NMR spectra of 36 differently substituted 4-methylcoumarins (4-methyl-2H-1-benzopyran-2-ones) have been recorded. The effects of an alkyl side-chain at C-3 on the chemical shift values and that of a methoxy or an acetoxy group in place of a hydroxy group have been observed and rationalized. This study may be helpful in the structure elucidation of new and natural 4-methylcoumarins.
Simplified analogues of previously reported NF- $$\upkappa \hbox B/DNA}$$ interaction inhibitors, lacking the furan moiety, were synthesized and evaluated by performing experiments based on electrophoretic mobility shift assay (EMSA). The synthetic modifications led to simpler coumarin derivatives with lower activity allowing to better understand the minimal structural requirement for the binding to NF- $$\upkappa \hbox B}$$ .