Studies culminating in the total synthesis and determination of the absolute configuration of (−)-saudin
作者:Robert K. Boeckman、Maria Rico del Rosario Ferreira、Lorna H. Mitchell、Pengcheng Shao、Michael J. Neeb、Yue Fang
DOI:10.1016/j.tet.2011.09.067
日期:2011.12
A full account of studies that culminated in the total synthesis of both antipodes and the assignment of its absolute configuration of Saudin, a hypoglycemic natural product. Two approaches are described, the first proceeding though bicyclic lactone intermediates and related second monocyclic esters. The former was obtained via asymmetric Diels–Alder cycloaddition and the latter by an asymmetric annulation
对最终对两种对映体的全合成及其绝对构型分配的研究的完整说明,这是一种降血糖的天然产物。描述了两种方法,第一种通过双环内酯中间体和相关的第二种单环酯进行。前者通过不对称 Diels-Alder 环加成获得,后者通过不对称环化方案获得。两种方法都采用路易斯酸促进的克莱森重排,成功的方法利用双齿螯合来控制关键克莱森重排的面部选择性。