已开发出室温下未活化的烷基溴和芳基碘的镍介导的分子间还原性交叉偶联反应,并成功地扩展到较少探索的分子内版本和串联环化-分子间交叉偶联。线性稠合的全氢呋喃[2,3- b ]呋喃(吡喃)和螺环骨架的高度立体选择性(或立体定向)合成可以快速获得这些有用的结构单元,这在相关天然产物的合成中可能具有潜在的价值。给出了形成连续立体中心的合理解释。
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.