Asymmetric Synthesis and CD Investigation of the 1,4-Benzodioxane Lignans Eusiderins A, B, C, G, L, and M
作者:Lisa I. Pilkington、David Barker
DOI:10.1021/jo3015006
日期:2012.9.21
The enantioselective synthesis of (−)-eusiderins A (1), B (2), G (25), L (23), M (5) and (+)-eusiderin C (20) and a range of analogues was undertaken using an efficient, divergent synthesis all from a single chiral aldehyde 15, which was derived from (S)-ethyl lactate 9. A comprehensive set of NMR data along with ECD spectra and optical rotation measurements of the synthesized natural products and
对映体选择性合成(-)-sideside A(1),B(2),G(25),L(23),M(5)和(+)-sideside C(20)和一系列类似物使用有效的,发散的合成全部来自一个单一的手性醛15,其衍生自(S)-乳酸9。然后获得了一套完整的NMR数据以及ECD光谱和合成的天然产物和类似物的旋光度测量值。该数据证实了甙类药物A(1)和C(20)的绝对立体化学。),并首次给出了伴生蛋白B(2),G(25),L(23)和M(5)以及一系列其他取代的1,4-苯并二恶烷的ECD和旋光性。该数据现在将用于确定此类化合物中其他成员的绝对立体化学。