Ligand‐Enabled β‐Methylene C(sp
<sup>3</sup>
)−H Arylation of Masked Aliphatic Alcohols
作者:Guoqin Xia、Zhe Zhuang、Luo‐Yan Liu、Stuart L. Schreiber、Bruno Melillo、Jin‐Quan Yu
DOI:10.1002/anie.202000632
日期:2020.5.11
salicylic-aldehyde-derived L,X-type directing group with an electron-deficient 2-pyridone ligand to enable the β-methylene C(sp3 )-H arylation of aliphatic alcohols, which has not been possible previously. Notably, this protocol is compatible with heterocycles embedded in both alcohol substrates and aryl coupling partners. A site- and stereo-specific annulation of dihydrocholesterol and the synthesis of a key
尽管有最新进展,但是反应性和位点选择性仍然是C(sp3)-H键官能化方法实际应用的重大障碍。在这里,我们描述了一个系统,该系统将水杨醛衍生的L,X型导向基团与缺电子的2-吡啶酮配体结合在一起,以使脂肪族醇的β-亚甲基C(sp3)-H芳基化以前有可能。值得注意的是,该方案与嵌入在醇底物和芳基偶联伙伴中的杂环兼容。二氢胆固醇的位点和立体特异性环合以及恩格列酮的关键中间体的合成说明了该方法的实用性。