Control of site-selectivity in chemical reactions that occur remote from existing functionality remains a major challenge in synthetic chemistry. We describe a strategy that enables three of the most commonly used cross-coupling processes to occur with high site-selectivity on dichloroarenes that bear acidic functional groups. We have achieved this by repurposing an established sulfonylated phosphine
在远离现有功能的
化学反应中控制位点选择性仍然是合成
化学中的主要挑战。我们描述了一种策略,该策略使三种最常用的交叉偶联过程能够在带有酸性官能团的二
氯芳烃上以高位点选择性发生。我们通过重新利用已建立的磺酰化
膦配体来利用其固有的双功能性来实现这一目标。机理研究表明,
磺酸盐基团与去质子化底物相关的阳离子发生吸引静电相互作用,引导与
芳烃间位处的
氯化物交叉偶联。