Metal–Organic Layers for Synergistic Lewis Acid and Photoredox Catalysis
作者:Yangjian Quan、Guangxu Lan、Yingjie Fan、Wenjie Shi、Eric You、Wenbin Lin
DOI:10.1021/jacs.9b12593
日期:2020.1.29
Metyrapone. The superior catalytic performance of Hf12-Ir-OTf over a mixture of photoredox catalyst and stoichiometric amounts of Brønstedacids or sub-stoichiometric amounts (20 mol%) of Lewis acids is attributed to the close proximity (1.2 nm) between photoredox and Lewis acid catalysts in Hf12-Ir-OTf, which not only facilitates the reaction between the carbon radical and the activated heteroarene but
Cobalt-catalyzed direct α-hydroxymethylation of amides with methanol as a C1 source
作者:Ben Ma、Rongxia Sun、Jingya Yang
DOI:10.1039/d1cc06501g
日期:——
A cobalt-catalyzed α-hydroxymethylation of amides with methanol as the C1 source has been developed.
一种以钴为催化剂,使用甲醇作为C1源进行酰胺的α-羟甲基化反应已经开发出来。
Regioselective α-Amination of Ethers Using Stable <i>N</i>-Chloroimides and Lithium <i>tert</i>-Butoxide
作者:Makafui Gasonoo、Zachary W. Thom、Sébastien Laulhé
DOI:10.1021/acs.joc.9b00824
日期:2019.7.5
Herein we describe a metal-free regioselective α-amination of ethers mediated by N-chloroimides in ethereal solvents in the presence of lithium tert-butoxide. This reactivity of N-chloroimides leads to the synthesis of hemiaminal ethers in good to excellent yields at roomtemperature. This C–H functionalization is achieved without the use of a light, heat source, or external radical initiators. Initial
Photocatalytic Dehydrogenative Cross-Coupling of Alkenes with Alcohols or Azoles without External Oxidant
作者:Hong Yi、Linbin Niu、Chunlan Song、Yiying Li、Bowen Dou、Atul K. Singh、Aiwen Lei
DOI:10.1002/anie.201609274
日期:2017.1.19
Direct cross‐coupling between alkenes/R‐H or alkenes/RXH is a dream reaction, especially without external oxidants. Inputting energy by photocatalysis and employing a cobalt catalyst as a two‐electron acceptor, a direct C−H/X−H cross‐coupling with H2 evolution has been achieved for C−O and C−N bond formation. A new radical alkenylation using alkene as the redox compound is presented. A wide range of
Copper-Catalyzed Alkylation of Quinoxalin-2(1H)-ones with Styrenes and tert-Butyl Peroxybenzoate
作者:Xiaoyang Zhong、Xinying Li、Hua Yao、Sen Lin、Zhaohua Yan、Hui Guo、Li Min
DOI:10.1055/a-1815-3539
日期:2022.6
A simple strategy for the synthesis of 3-substituted quinoxalin-2(1H)-ones containing ether units is proposed. The method is realized by the three-component synthesis of quinoxalin-2(1H)-ones, styrenes, and tert-butyl peroxybenzoate (TBPB). This reaction has good functional group tolerance and may involve a free-radical process.
提出了一种合成含醚单元的 3-取代的 quinoxalin-2(1 H )-ones 的简单策略。该方法通过quinoxalin-2(1 H )-ones、苯乙烯和过氧苯甲酸叔丁酯(TBPB)的三组分合成来实现。该反应具有良好的官能团耐受性,可能涉及自由基过程。