Photocatalytic Intramolecular C–H Amination Using <i>N</i>-Oxyureas as Nitrene Precursors
作者:Ryan A. Ivanovich、Dilan E. Polat、André M. Beauchemin
DOI:10.1021/acs.orglett.0c02200
日期:2020.8.21
Nitrenes are remarkable high-energy chemical species that enable direct C–N bond formation, typically via controlled reactions of metal-stabilized nitrenes. Here, in contrast, the combined use of photocatalysis with careful engineering of the precursor enabled C–H amination forming imidazolidinones and related nitrogen heterocycles from readily accessible hydroxylamine precursors. Preliminary mechanistic
硝基是非凡的高能化学物质,通常可通过金属稳定的腈的受控反应直接形成C-N键。相比之下,光催化与前体的精心设计相结合,可以使C–H胺化反应从易得的羟胺前体形成咪唑烷酮和相关的氮杂环。初步的机理结果与游离氨基甲酰基三重态氮烯作为反应性中间体的形成是一致的。