forming a newcarbon-carbonbond while preserving the carbon-halogen bond has been developed. A cheap and readily available Ni-catalyst is employed to generate nitrogen containing heterocycles in good to excellent yields and the procedure is readily scalable. The more readily available aryl bromides were also cyclized with the addition of potassium iodide to generate the respective alkyl iodides. A rare
已开发出一种新型镍催化的环异构化反应,可在保留碳 - 卤素键的同时形成新的碳 - 碳键。使用廉价且易于获得的 Ni 催化剂以良好至极好的产率生成含氮杂环,并且该过程易于扩展。更容易获得的芳基溴化物也通过加入碘化钾环化以生成相应的烷基碘化物。使用双膦和一氧化二膦的罕见双配体系统用于获得对映体富集的产品。
Pd(0)/Blue Light Promoted Carboiodination Reaction – Evidence for Reversible C–I Bond Formation via a Radical Pathway
作者:Austin D. Marchese、Andrew G. Durant、Cian M. Reid、Clara Jans、Ramon Arora、Mark Lautens
DOI:10.1021/jacs.2c09716
日期:2022.11.16
A Pd(0)/blue light catalyzed carboiodination reaction is reported. A simple, air-stable catalytic system, utilizing [Pd(allyl)Cl]2 and DPEPhos, generated a variety of iodinated hetero- and carbocycles including oxindoles, dihydrobenzofurans, indolines, a chromane, and a tetrahydronaphthalene. This protocol was tolerant of sensitive functional groups including free carboxylic acids, phenols, and anilines