Merremoside D: <i>De Novo</i> Synthesis of the Purported Structure, NMR Analysis, and Comparison of Spectral Data
作者:Ehesan U. Sharif、Hua-Yu Leo Wang、Novruz G. Akhmedov、George A. O’Doherty
DOI:10.1021/ol403369h
日期:2014.1.17
The first synthesis of the purported structure of Merremoside D has been achieved in 22 longest linear steps. The de novo asymmetric synthesis relied on the use of asymmetric catalysis to selectively install all 21 stereocenters in the final compounds from commercially available achiral starting materials. Adiabatic gradient 2D NMR techniques (gHSQCAD, gHMBCAD, gH2BCAD, gHSQCTOXYAD, ROESYAD) were used
Merremoside D 的据称结构的首次合成是在 22 个最长的线性步骤中实现的。在从头不对称合成依赖于使用不对称催化的,以选择性地从可商购的非手性起始材料安装在最终化合物的所有立构中心21。绝热梯度 2D NMR 技术(gHSQCAD、gHMBCAD、gH2BCAD、gHSQCTOXYAD、ROESYAD)用于完全分配合成 Merremoside D 的结构。将我们的分配与天然 Merremoside D 报告的有限 NMR 数据进行比较允许对其结构进行初步确认.