Kk. Srivastav et al., CONFIGURATIONAL ASSIGNMENT OF DIELS-ALDER ADDUCT OF N-CARBOETHOXY 1,2-DIHYDROPYRIDINE-MALEIMIDE BY DNMR SPECTROSCOPY, National Academy Science Letters, 19(1-2), 1996, pp. 16-18
Endo configuration of the DA adduct of N-carboethoxy 1, 2-dihydropyrid
ine-N-phenyl male imide has been demonstrated through slow rotation ab
out N-C (phenyl) and N- C (pyridyl) bonds by H-1-NMR spectroscopy.]