Traceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates.

Traceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates.
复制标题

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
复制
发表时间:
2022-07-11
影响因子:
16.6
通讯作者:
Powers, David C.
Powers, David C.
中科院分区:
化学1区
文献类型:
--
作者:
Roychowdhury, Pritam;Herrera, Roberto G.;Tan, Hao;Powers, David C.

文献摘要

参考文献

相似文献

C-H胺化反应提供了简化含氮有机小分子合成的机会。然而,分子间C-H胺化方法的影响目前受到胺前体带有活化基团(例如N-磺酰基取代基)的典型要求的限制,所述活化基团既被取代以除去,又对随后的衍生化没有有用的合成柄。在这里,我们介绍了无痕氮活化C-H胺化-这使得选择性的C-H胺化化学的应用程序,以制备不同的N-官能化的产品-通过顺序苄基C-H N-氨基吡啶化,然后由Ni催化的C-N交叉偶联与芳基硼酸。与许多提供保护胺的C-H胺化反应不同,本方法安装了一个容易多样化的合成手柄,作为C-H胺化、脱氨基N-N官能化序列的关键。在这里,我们报告C-H胺化化学通过无痕双功能氮活化。顺序的C-H氨基吡啶化,然后与芳基硼酸的Ni催化的交叉偶联提供了芳基氮烯插入C-H键的产物。由于芳基氮烯固有的不稳定性,这些产品不能通过直接氮烯插入获得。所描述的方法可以应用于生物活性分子的背景下。
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.
DOI: 10.1021/op200046v
发表时间: 2011-07-15
影响因子: 3.4
作者:
Bois JD
通讯作者: Bois JD
DOI: 10.1021/acs.orglett.9b02643
发表时间: 2019-09-20
期刊: ORGANIC LETTERS
影响因子: 5.2
作者:
Hoerrner, Megan E.;Baker, Kristen M.;Watson, Mary P.
通讯作者: Watson, Mary P.
DOI: 10.1021/acs.orglett.9b02054
发表时间: 2019-07-05
期刊: ORGANIC LETTERS
影响因子: 5.2
作者:
Hillenbrand, Julius;Ham, Won Seok;Ritter, Tobias
通讯作者: Ritter, Tobias
DOI: 10.1021/jacs.7b02389
发表时间: 2017-04-19
影响因子: 15
作者:
Basch CH;Liao J;Xu J;Piane JJ;Watson MP
通讯作者: Watson MP
DOI: 10.1002/anie.201713225
发表时间: 2018-04-23
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.