Synthesis of 1,1′-Diarylethanes and Related Systems by Displacement of Trichloroacetimidates with Trimethylaluminum
作者:Nivedita S. Mahajani、John D. Chisholm
DOI:10.1021/acs.joc.8b00027
日期:2018.4.6
Benzylic trichloroacetimidates are readily displaced by trimethylaluminum under Lewis acid promoted conditions to provide the corresponding methyl substitution product. This method is a convenient way to access 1,1′-diarylethanes and related systems, which play a significant role in medicinal chemistry, with a number of systems owing their biological activity to this functionality. Most benzylic substrates
在路易斯酸促进的条件下,三氯乙酰亚胺酸苄酯很容易被三甲基铝取代,以提供相应的甲基取代产物。该方法是获取 1,1'-二芳基乙烷和相关系统的便捷方法,这些系统在药物化学中发挥着重要作用,许多系统的生物活性归功于此功能。大多数苄基底物都会发生位移,但缺电子系统除外。对映体纯亚氨酸酯的使用显示出显着的外消旋作用,表明形成了阳离子中间体。