ppm Pd‐Containing Nanoparticles as Catalysts for Negishi Couplings …
<i>in Water</i>
作者:Yuting Hu、Madison J. Wong、Bruce H. Lipshutz
DOI:10.1002/anie.202209784
日期:2022.9.26
Palladium-catalyzed Negishicouplings rely typically on pre-formed organozinc reagents, dry organic solvents, and unsustainable loadings of a Pdcatalyst (usually 1–5 mol %). In this report we describe heterogeneous nanoparticle-catalyzed couplings under mild conditions using water as the reaction medium, and only ppm levels of a Pdcatalyst.
para-Selective, Direct C(sp<sup>2</sup>)–H Alkylation of Electron-Deficient Arenes by the Electroreduction Process
作者:Pufan Ni、Lei Yang、Jiasheng Yang、Ruihua Cheng、Weiping Zhu、Yueyue Ma、Jinxing Ye
DOI:10.1021/acs.joc.2c02412
日期:2023.5.5
para-selective C(sp2)–H alkylation of electron-deficient arenes based on the electroreduction-enabled radical addition of alkyl bromides has been developed under mild conditions. In the absence of any metals and redox agents, the simple electrolysis system tolerates a variety of primary, secondary, and tertiary alkyl bromides and behaves as an important complement to the directed alkylation of the C(sp2)–H bond