Decarboxylative 1,4-carbocyanation of 1,3-enynes to access tetra-substituted allenes <i>via</i> copper/photoredox dual catalysis
作者:Ya Chen、Junjie Wang、Yixin Lu
DOI:10.1039/d1sc02896k
日期:——
An efficient synthesis of multi-substituted allenes by metallaphotoredox-catalyzed decarboxylative 1,4-carbocyanation of 1,3-enynes is described.
一种高效的方法通过金属光还原催化的脱羧1,4-碳氰化反应合成多取代联烯。
A Radical Approach to Anionic Chemistry: Synthesis of Ketones, Alcohols, and Amines
作者:Shengyang Ni、Natalia M. Padial、Cian Kingston、Julien C. Vantourout、Daniel C. Schmitt、Jacob T. Edwards、Monika M. Kruszyk、Rohan R. Merchant、Pavel K. Mykhailiuk、Brittany B. Sanchez、Shouliang Yang、Matthew A. Perry、Gary M. Gallego、James J. Mousseau、Michael R. Collins、Robert J. Cherney、Pavlo S. Lebed、Jason S. Chen、Tian Qin、Phil S. Baran
DOI:10.1021/jacs.9b02238
日期:2019.4.24
Historically accessed through two-electron, anionicchemistry, ketones, alcohols, and amines are of foundational importance to the practice of organic synthesis. After placing this work in proper historical context, this Article reports the development, full scope, and a mechanistic picture for a strikingly different way of forging such functional groups. Thus, carboxylic acids, once converted to redox-active
Triphenylphosphine-Catalyzed Alkylative Iododecarboxylation with Lithium Iodide under Visible Light
作者:Ming-Chen Fu、Jia-Xin Wang、Rui Shang
DOI:10.1021/acs.orglett.0c03173
日期:2020.11.6
light-emitting diodes, PPh3 catalyzes the iododecarboxylation of aliphatic carboxylic acid derived N-(acyloxy)phthalimide with lithiumiodide as an iodine source. The reaction delivers primary, secondary, and bridgehead tertiary alkyl iodides in acetone solvent, and the alkyl iodide products were easily used to generate C–N, C–O, C–F, and C–S bonds to allow various decarboxylative transformations without
作者:Fumihiko Toriyama、Josep Cornella、Laurin Wimmer、Tie-Gen Chen、Darryl D. Dixon、Gardner Creech、Phil S. Baran
DOI:10.1021/jacs.6b07172
日期:2016.9.7
single electron transfer using Ni and Fe catalyst systems have been studied extensively, and separately, for decades. Here we demonstrate the first couplings of redox-active esters (both isolated and derived in situ from carboxylic acids) with organozinc and organomagnesium species using an Fe-based catalyst system originally developed for alkyl halides. This work is placed in context by showing a direct
几十年来,基于单电子转移使用 Ni 和 Fe 催化剂体系的烷基卤化物和有机金属物种的交叉偶联已被广泛且分别地研究。在这里,我们展示了氧化还原活性酯(从羧酸中分离和原位衍生)与有机锌和有机镁物种的首次偶联,使用最初为烷基卤化物开发的 Fe 基催化剂体系。这项工作通过展示与 Ni 催化剂的直接比较来放置在上下文中,涉及超过 40 个示例,涵盖一系列初级、二级和三级底物。这种新的 C-C 耦合具有可扩展性和可持续性,并且在某些情况下比其基于 Ni 的耦合表现出许多明显的优势。
Copper-catalysed photoinduced decarboxylative alkynylation: a combined experimental and computational study
作者:Yu Mao、Wenxuan Zhao、Shuo Lu、Lei Yu、Yi Wang、Yong Liang、Shengyang Ni、Yi Pan
DOI:10.1039/d0sc02213f
日期:——
Redox-active esters (RAEs) as alkyl radical precursors have demonstrated great advantages for C–C bond formation. A decarboxylative cross-coupling method is described to afford substituted alkynes from various carboxylic acids using copper catalysts CuCl and Cu(acac)2. The photoexcitation of copper acetylides with electron-rich NEt3 as a ligand provides a general strategy to generate a range of alkyl