Traceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates.
Traceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates.
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通过双官能N-氨基吡啶中间体的痕量苄基C-H胺化。
DOI:
10.1002/anie.202200665
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发表时间:
2022-07-11
影响因子:
16.6
通讯作者:
Powers, David C.
中科院分区:
文献类型:
--
作者:
Roychowdhury, Pritam;Herrera, Roberto G.;Tan, Hao;Powers, David C.
C–H amination reactions provide the opportunity to streamline the synthesis of nitrogen-containing organic small molecules. The impact of intermolecular C–H amination methods, however, is currently limited by typical requirement that the amine precursors bear activating groups, such as N-sulfonyl substituents, that are both challenaging to remove and not useful synthetic handles for subsequent derivatization. Here, we introduce traceless nitrogen activation for C–H amination—which enables application of selective C–H amination chemistry to the preparation of diverse N-functionalized products—via sequential benzylic C–H N-aminopyridylation followed by Ni-catalyzed C–N cross coupling with aryl boronic acids. Unlike many C–H amination reactions that provide access to protected amines, the current method installs an easily diversifiable synthetic handle that serves as a lynchpin for C–H amination, deaminative N–N functionalization sequences. Here we report C–H amination chemistry via traceless bifunctional nitrogen activation. Sequential C–H aminopyridylation followed by Ni-catalyzed cross coupling with aryl boronic acids affords the products of aryl nitrene insertion into C–H bonds. These products are unavailable by direct nitrene insertion due to the intrinsic instability of aryl nitrenes. The described method can be applied in the context of pharmacologically active molecules.
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影响因子:
3.4
作者:
Bois JD
通讯作者:
Bois JD
影响因子:
5.2
作者:
Hoerrner, Megan E.;Baker, Kristen M.;Watson, Mary P.
通讯作者:
Watson, Mary P.
影响因子:
5.2
作者:
Hillenbrand, Julius;Ham, Won Seok;Ritter, Tobias
通讯作者:
Ritter, Tobias
影响因子:
15
作者:
Basch CH;Liao J;Xu J;Piane JJ;Watson MP
通讯作者:
Watson MP
影响因子:
16.6
作者:
Chiappini, Nicholas D.;Mack, James B. C.;Du Bois, J.
通讯作者:
Du Bois, J.