Palladium nanoparticles: Chemoselective control for reductive Heck with aryl triflates and 2,3-dihydrofuran
作者:Daisy Rosas Vargas、Silas P. Cook
DOI:10.1016/j.tet.2018.04.052
日期:2018.6
Consequently, further development of new variants would be transformative. Unfortunately, controlling the relative rates of the organopalladium intermediates has proven difficult with homogenous, single-site Pd catalysts. This work describes a selective reductive Heck reaction catalyzed by Pd-nanoparticles. The reaction works well with electron-deficient aryl triflates at room temperature in the absence
for a structurally divergent oxidative C(sp3)–H bond functionalization. This protocol employs a photoredox/iron dual catalysis allowing for an unprecedented chemoselective single-step transformation of alcohol derivatives giving access to two valuable sets of products, tetrahydrofurans and γ-bromoketones, under one set of conditions. Addition of iron, by slow corrosion of a needle, provides superior
描述了可见光介导的烷氧基自由基生成,它允许结构上不同的氧化 C(sp 3 )-H 键官能化。该协议采用光氧化还原/铁双催化,允许在一组条件下对醇衍生物进行前所未有的化学选择性单步转化,从而获得两组有价值的产品四氢呋喃和 γ-溴酮。与各种铁 ( III ) 配合物相比,通过针的缓慢腐蚀添加铁可提供优异的反应效率。