Carbon-13 nuclear magnetic resonance of some derivatives of 3-methyl-4,1-benzoxazepine-2,5-dione

摘要

13C chemical shift assignment of seven N-derivatives of 3-methyl-4,1-benzoxazepine-2,5-dione is reported. The assignment has been done with the help of J-modulated spectra and by comparison with the values of resembling segments reported in the reference. It has been found that the substituent on nitrogen atom has no significant effect on the13C chemical shift of the skeleton.