Photoredox-Mediated Remote C(sp<sup>3</sup>)–H Heteroarylation of <i>N</i>-Alkyl Sulfonamides
作者:Zhiqiang Deng、Guo-Xing Li、Gang He、Gong Chen
DOI:10.1021/acs.joc.9b02502
日期:2019.12.20
heteroarylation of sulfonyl-protected primary aliphatic amines with N-heteroarenes under photoredox-catalyzed conditions was developed. The reaction typically uses a slight excess of amine reactant. The use of benziodoxole acetate (BI-OAc) oxidant and hexafluoroisopropanol solvent is critical to achieve high yield. Besides methylene C-H bonds, heteroarylation reactions of δ methyl C-H bonds also worked under
在光氧化还原催化条件下,开发了磺酰基保护的脂肪族伯胺与N-杂芳烃的Minisci型δ-选择性C(sp3)-H杂芳基化反应。该反应通常使用稍微过量的胺反应物。乙酸苯并恶多酚(BI-OAc)氧化剂和六氟异丙醇溶剂的使用对于实现高收率至关重要。除亚甲基CH键外,δ甲基CH键的杂芳基化反应也可在更强的条件下进行。该反应对于胺和N-杂芳烃底物均显示出广泛的范围,为从简单的前体合成复杂的δ-杂芳基烷基胺提供了一种简便的方法。