N-Ammonium Ylide Mediators for Electrochemical C-H Oxidation.

N-Ammonium Ylide Mediators for Electrochemical C-H Oxidation.
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DOI:
10.1021/jacs.1c03780
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发表时间:
2021-05-26
影响因子:
15
通讯作者:
Baran PS
Baran PS
中科院分区:
化学1区
文献类型:
--
作者:
Saito M;Kawamata Y;Meanwell M;Navratil R;Chiodi D;Carlson E;Hu P;Chen L;Udyavara S;Kingston C;Tanwar M;Tyagi S;McKillican BP;Gichinga MG;Schmidt MA;Eastgate MD;Lamberto M;He C;Tang T;Malapit CA;Sigman MS;Minteer SD;Neurock M;Baran PS

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The site-specific oxidation of strong C(sp3)–H bonds is of uncontested utility in organic synthesis. From simplifying access to metabolites and late-stage diversification of lead compounds to truncating retrosynthetic plans, there is a growing need for new reagents and methods for achieving such a transformation in both academic and industrial circles. One main drawback of current chemical reagents is the lack of diversity with regard to structure and reactivity that prevents a combinatorial approach for rapid screening to be employed. In that regard, directed evolution still holds the greatest promise for achieving complex C–H oxidations in a variety of complex settings. Herein we present a rationally designed platform that provides a step toward this challenge using N-ammonium ylides as electrochemically driven oxidants for site-specific, chemoselective C(sp3)–H oxidation. By taking a first-principles approach guided by computation, these new mediators were identified and rapidly expanded into a library using ubiquitous building blocks and trivial synthesis techniques. The ylide-based approach to C–H oxidation exhibits tunable selectivity that is often exclusive to this class of oxidants and can be applied to real-world problems in the agricultural and pharmaceutical sectors.
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