Photo-induced Carboiodination: A Simple Way to Synthesize Functionalized Dihydrobenzofurans and Indolines
作者:Xiaobo Yang、Wenbo Liu、Lu Li、Wei Wei、Chao-Jun Li
DOI:10.1002/chem.201603608
日期:2016.10.17
readily available and cheap aryl bromides and sodium iodide as the starting materials to synthesize valuable functionalized dihydrobenzofurans and indolines in good to excellent yields with broad functional‐group compatibility. As examples to demonstrate the utility of this protocol, gram‐scale reactions and further transformations of the products were accomplished towards the synthesis of bioactive
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
light-catalyzed carbohalogenation reaction is reported. A nickel catalyst and an inexpensive phosphine ligand promote the reaction of aryl iodides and aryl bromides with π systems to enable the construction of a library of halogenated heterocyclic scaffolds. Mechanistic studies provide insight regarding fundamental steps of the catalytic cycle, including the reversible C–X bond formation via deuterium labeling