Dirhodium-catalyzed C-H arene amination using hydroxylamines.

Dirhodium-catalyzed C-H arene amination using hydroxylamines.
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DOI:
10.1126/science.aaf8713
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发表时间:
2016-09-09
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Falck JR
Falck JR
中科院分区:
其他
文献类型:
--
作者:
Paudyal MP;Adebesin AM;Burt SR;Ess DH;Ma Z;Kürti L;Falck JR

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伯胺和 N-烷基芳胺基序是药物、农用化学品和功能材料以及生物活性天然产物中的关键官能团。然而,缺乏普遍适用的用-NH2/-NH-烷基部分直接取代芳基氢的方法。在这里,我们提出了一种温和的二铑催化的C-H胺化反应,使用NH2/NH烷基-O-(磺酰基)羟胺作为胺化剂,将结构多样的单环和稠合芳族化合物转化为相应的伯胺和N-烷基芳胺;相对较弱的RSO2O-N键起到内氧化剂的作用。该方法操作简单,可扩展,并且在环境温度或低于环境温度下快速,以中等至良好的产率提供芳胺,并具有良好的区域选择性。它可以很容易地扩展到稠合N-杂环的合成。
Primary and N-alkyl arylamine motifs are key functional groups in pharmaceuticals, agrochemicals and functional materials as well as in bioactive natural products. However, there is a dearth of generally applicable methods for the direct replacement of aryl hydrogens with –NH2/-NH-alkyl moieties. Here, we present a mild dirhodium-catalyzed C-H amination for conversion of structurally diverse monocyclic and fused aromatics to the corresponding primary and N-alkyl arylamines using either NH2/NHalkyl-O-(sulfonyl)hydroxylamines as aminating agents; the relatively weak RSO2O-N bond functions as an internal oxidant. The methodology is operationally simple, scalable, and fast at or below ambient temperature, furnishing arylamines in moderate-to-good yields and with good regioselectivity. It can be readily extended to the synthesis of fused N-heterocycles.
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