Unlocking the Accessibility of Alkyl Radicals from Boronic Acids through Solvent-Assisted Organophotoredox Activation
作者:Prabhat Ranjan、Serena Pillitteri、Guglielmo Coppola、Monica Oliva、Erik V. Van der Eycken、Upendra K. Sharma
DOI:10.1021/acscatal.1c02823
日期:2021.9.3
acids (BAs) as alkyl radical precursors in visible-light-assisted photocatalyzed reactions has been limited by their high oxidation potential. This study demonstrates the prominent ability of amide solvents, namely, N,N-dimethylacetamide, to participate in hydrogen-bonding interactions with BAs, thus enabling the modulation of their oxidation potential toward the generation of alkyl radicals. The developed
尽管硼酸 (BA) 在有机合成中很流行,但硼酸 (BA) 作为烷基自由基前体在可见光辅助光催化反应中的应用受到其高氧化电位的限制。该研究证明了酰胺溶剂的突出能力,即N , N-二甲基乙酰胺,参与与 BA 的氢键相互作用,从而能够调节它们的氧化电位以产生烷基自由基。开发的协议简单而可靠,并证明了在间歇和连续流中烷基化、烯丙基化和消除反应的广泛适用性。对脱氢丙氨酸的应用允许合成非天然氨基酸。此外,在含硼酸酯分子的存在下,从 BA 化学选择性生成自由基物种现在是可行的,支持合理的硼选择性(生物)正交修饰。