N. Khan et al., C-13 NUCLEAR-MAGNETIC-RESONANCE OF SOME DERIVATIVES OF 3-METHYL-4,1-BENZOXAZEPINE-2,5-DIONE, Monatshefte fuer Chemie, 124(6-7), 1993, pp. 783-787
C-13 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 the C-13
chemical shift of the skeleton.