Visible Light-Mediated Atom Transfer Radical Addition via Oxidative and Reductive Quenching of Photocatalysts
作者:Carl-Johan Wallentin、John D. Nguyen、Peter Finkbeiner、Corey R. J. Stephenson
DOI:10.1021/ja300798k
日期:2012.5.30
visible light-mediated atom transfer radical addition (ATRA) of haloalkanes onto alkenes and alkynes using the reductive and oxidativequenching of [IrdF(CF(3))ppy}(2)(dtbbpy)]PF(6) and [Ru(bpy)(3)]Cl(2) is presented. Initial investigations indicated that the oxidativequenching of photocatalysts could effectively be utilized for ATRA, and since that report, the protocol has been expanded by broadening
Photo-Organocatalysis of Atom-Transfer Radical Additions to Alkenes
作者:Elena Arceo、Elisa Montroni、Paolo Melchiorre
DOI:10.1002/anie.201406450
日期:2014.11.3
haloalkanes onto olefins, one of the fundamental carbon–carbon bond‐forming transformations in organic chemistry. The reaction requires exceptionally mild reaction conditions to proceed, as it occurs at ambient temperature and under illumination by a readily available fluorescent light bulb. Initial investigations support a mechanism whereby the aldehydic catalyst photochemically generates the reactive
perfluoroalkylation of organic compounds is reported. This operationally simple approach occurs under mild conditions producing valuable new C-C bonds. The chemistry is driven by the ability of NCNDs to directly reach an electronically excited state upon light absorption, thereby successively triggering the formation of reactive radical species from simple perfluoroalkyliodides. Preliminary mechanistic
报道了使用富含胺的 N 掺杂碳纳米点 (NCND) 进行有机化合物的光化学自由基全氟烷基化。这种操作简单的方法发生在温和的条件下,产生有价值的新 CC 债券。这种化学反应是由 NCND 在吸收光后直接达到电子激发态的能力驱动的,从而连续触发从简单的全氟烷基碘化物形成反应性自由基物种。还报告了初步的机理研究。
Visible Light-Induced Radical Iodoperfluoroalkylation of Unactivated Olefins Cooperatively Catalyzed by Enamines and Amines
作者:Tomoko Yajima、Mao Murase、Yu Ofuji
DOI:10.1002/ejoc.201901896
日期:2020.7.7
Metal‐free visible light‐induced ATRA of perfluoroalkyl iodide was performed. The reaction is effective for various perfluoroalkyl iodide and unactivated alkenes and alkynes and proceeded smoothly with 1 mol‐% aldehyde and amine.
Metal-Free Visible-Light Radical Iodoperfluoroalkylation of Terminal Alkenes and Alkynes
作者:Tomoko Yajima、Mako Ikegami
DOI:10.1002/ejoc.201700077
日期:2017.4.18
iodoperfluoroalkylation of unactivated terminal alkenes and alkynes was explored. This process was found to be effective for the simultaneous introduction of iodide and various perfluoroalkyl groups (including difluoroacetate) to alkenes and alkynes possessing a variety of functional groups. A possible reaction mechanism is proposed. This reaction provides a new, metal-free, green method for the synthesis of perfluoroalkylated