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The conformations and relative configurations of four epoxides of α-amido cyclo- hexenes have been determined by the combination of molecular modeling and NMR decoupling technique. cis-Epoxides were deduced from the vicinal coupling constants calculated from the torsional angles H(1)–C(1)–C(2)–H(2) in modeling models by means of Karplus equation and observed by decoupling technique. The crystal structure of cis-4-nitro-N-(7-oxabicyclo[4.1.0]hept- 2-yl)benzamide further confirms this assignment.
The conformations and relative configurations of four epoxides of α-amido cyclo-hexenes have been determined by the combination of molecular modeling and NMR decoupling technique. Cis-Epoxides were deduced from the vicinal coupling constants calculated from the torsional angles H (1) -C The crystal structure of cis-4-nitro-N- (7-oxabicyclo [4.1.0] hept- 2-yl) benzamide further confirms this assignment.