作者:P.S. Portoghese、J.G. Turcotte
DOI:10.1016/s0040-4020(01)92495-0
日期:1971.1
The N-benzoyl derivatives of 2-oxa-5-azabicyclo[2.2.1]heptane (7) and of 2-oxa-5-azabicyclo [2.2.1]heptane-3-one (8) have been prepared from hydroxy-L-proline. The NMR spectra of these compounds have been analyzed with the aid of variable temperature studies. It was found that ΔG‡ for NCO rotation in 7 is ≈ 2 Kcal/mole higher than for 8. Possible explanations for the difference in ΔG‡ are discussed
由羟基-制备了2-氧杂-5-氮杂双环[2.2.1]庚烷(7)和2-氧杂-5-氮杂双环[2.2.1]庚烷-3-酮(8)的N-苯甲酰基衍生物。L-脯氨酸。这些化合物的NMR光谱已通过可变温度研究进行了分析。发现在7中NCO旋转的ΔG ‡比8中的高约2 Kcal / mole 。讨论了ΔG ‡的差异的可能解释。