Short and convenient synthesis of two natural phthalides by a copper(I) catalysed Sonogashira/oxacyclisation copper(I) process
作者:Julien Petrignet、Samuel Inack Ngi、Mohamed Abarbri、Jérôme Thibonnet
DOI:10.1016/j.tetlet.2013.12.032
日期:2014.1
Total synthesis of (±)-herbaric acid and (±)-(4-methoxybenzyl)-5,7-dimethoxyphthalide, two natural phthalide products, was achieved in 8 steps and 5 steps, respectively, starting from commercially available 3,5-dimethoxyaniline. The key step of the sequence included a copper-catalysed tandem cross-coupling and oxacylisation reaction of terminal alkynes and 2-iodobenzoïc acid derivatives via 5-exo-dig
从天然市售的3,5-起始,分别在8个步骤和5个步骤中分别完成了(±)-草酸和(±)-(4-甲氧基苄基)-5,7-二甲氧基邻苯二酚的全合成。二甲氧基苯胺。该序列的关键步骤包括通过具有高立体选择性,区域选择性和化学选择性的5- exo- dig环化反应,使末端炔烃和2-碘苯甲酸衍生物进行铜催化的串联交叉偶联和羰基化反应。这种简单的方法可以制备多种邻苯二甲酸酯,这些邻苯二甲酸酯属于一组具有重要药理意义的化合物。