Phytosphingosines — a facile synthesis and spectroscopic protocol for configurational assignment
作者:Osamu Shirota、Koji Nakanishi、Nina Berova
DOI:10.1016/s0040-4020(99)00839-x
日期:1999.11
based on a two-step derivatization to 2-N-naphthimide- 1,3,4-O-trinaphthoate derivatives which gives rise to unique exciton coupled circular dichroic and 1H-NMR spectra in selected solvents. The spectra can be used as reference data for assignment of relative as well as absolute configurations of phytosphingosine isomers and congeners at the low-nanomole level.
通过使用Wittig和Julia烯化反应,然后进行Sharpless二羟基化反应,已轻松合成了植物鞘氨醇的8种构型异构体中的4种。这四种立体异构体的集合用作模型化合物,用于开发用于分配所有植物鞘氨醇异构体的相对和绝对构型的通用化学/ CD / NMR方案。该程序基于两步衍生化为2- N-萘酰亚胺-1,3,4 - O-叔萘甲酸酯衍生物,这在选定的溶剂中产生了独特的激子耦合的圆二色性光谱和1 H-NMR光谱。光谱可用作参考数据,用于分配低鞘氨醇水平的植物鞘氨醇异构体和同类物的相对和绝对构型。