Stereospecific Syntheses of the Lignans: 2-S-(3,4-Dimethoxybenzyl)-3-R-(3,4,5-trimethoxybenzyl) Butyrolactone, and Its Positional Isomeric Lactone
作者:Alírica Suárez、Francisco López、Reinaldo S. Compagnone
DOI:10.1080/00397919308009859
日期:1993.7
Abstract A short, versatile and stereospecific synthesis of two lignans 1 and 2, was achieved in 40% overall yield. Our strategy was based in the use of amino acids as chiral and readily available starting materials. Stereocontroled transformation of amino acids to chiral organic phosphonates gave the key intermediate of the synthetic sequence. A Horner-Wadsworth-Emmons (HWE) reaction followed by selective
摘要 以 40% 的总产率实现了两种木脂素 1 和 2 的简短、通用和立体定向合成。我们的策略基于使用氨基酸作为手性和容易获得的起始材料。氨基酸向手性有机膦酸酯的立体控制转化给出了合成序列的关键中间体。Horner-Wadsworth-Emmons (HWE) 反应,然后在最后一步进行选择性还原和立体定向氢化,得到具有所需绝对立体化学的标题化合物。