Surprisingly stable formamide rotamers were encountered in the tetrahydroisoquinoline and morphinan series of alkaloids. We investigated the hindered rotation around the amide bond by dynamic high-performance liquid chromatography (DHPLC) and kinetic measurements of the interconversion of the rotamers which can readily be separated by HPLC as well as TLC. The experimental results of the different methods were compared to each other as well as to results obtained by DFT calculations.
在吗?以下是翻译结果:
在吖啶和吗啡系列生物碱中,我们发现了令人惊讶的稳定甲酰胺构象异构体。我们通过动态高效液相色谱(DHPLC)和动力学测量来研究酰胺键周围的受阻转动,并且这些异构体可以通过HPLC和薄层色谱(TLC)轻松地分离。我们将不同方法的实验结果进行了比较,并与通过DFT计算得出的结果进行了比较。