Sonogashira Cross-Coupling of Aryltrimethylammonium Salts
作者:Qianwei Chen、Fengchen Gao、Huiling Tang、Miao Yao、Qian Zhao、Yanhui Shi、Yanfeng Dang、Changsheng Cao
DOI:10.1021/acscatal.9b00218
日期:2019.4.5
Sonogashira coupling reaction involving C–N bond cleavage with aryltrimethylammonium triflate as an electrophilic coupling partner is described in this work. The reactions proceeded well undermildconditions with a stoichiometric ratio of alkyl, aryl, or heteroaryl acetylenes and provided yields of up to 93%. Numerous useful functional groups were tolerated under the reaction conditions. Direct amine
LiHMDS-Promoted Palladium-Catalyzed Sonogashira Cross-Coupling of Aryl Fluorides with Terminal Alkynes
作者:Jingjing He、Kang Yang、Jianhong Zhao、Song Cao
DOI:10.1021/acs.orglett.9b03815
日期:2019.12.6
A highly efficient Pd-catalyzed Sonogashira coupling of various aryl fluorides with terminalalkynes in the presence of LiHMDS was developed. Both unreactive electron-rich fluoroarenes and electron-poor fluoroarenes proceeded smoothly and afforded the corresponding internalalkynes in moderate to excellent yields.
Gold-Catalyzed Dimerization of Diarylalkynes: Direct Access to Azulenes
作者:Vanessa Claus、Michael Schukin、Siegfried Harrer、Matthias Rudolph、Frank Rominger、Abdullah M. Asiri、Jin Xie、A. Stephen K. Hashmi
DOI:10.1002/anie.201805918
日期:2018.9.24
We have developed a simple gold‐catalyzed procedure for the synthesis of substituted and modifiable azulenes. The azulenes are formed either by the dimerization of push–pull diarylalkynes bearing a fluorine atom in ortho or para position or by the dimerization of a symmetric electron‐rich diarylalkyne. In the presence of a cationic gold catalyst, the two alkynes can form a highly reactive vinyl cation
Simple Access to 2‐Arylbenzo[
<i>b</i>
]tellurophenes
作者:Edgars Paegle、Pavel Arsenyan
DOI:10.1002/ejoc.202201367
日期:2023.2.13
A simple and cost-effective method for the preparation of benzo[b]tellurophenes has been developed: overnight heating of o-haloarylalkynes with Te-NaOH-DMSO triad without the need for dry and inert atmosphere provides the corresponding benzo[b]tellurophenes.
已开发出一种制备苯并 [ b ] 碲吩的简单且经济高效的方法:在不需要干燥和惰性气氛的情况下,用 Te-NaOH-DMSO 三元组对邻卤代芳基炔进行过夜加热,可提供相应的苯并 [ b ]碲吩。
Cu/Oxalic Diamide-Catalyzed Coupling of Terminal Alkynes with Aryl Halides
作者:Ying Chen、Sailuo Li、Lanting Xu、Dawei Ma
DOI:10.1021/acs.joc.2c02882
日期:2023.3.3
6-Dimethylphenyl)-N2-(pyridin-2-ylmethyl)oxalamide (DMPPO) was revealed to be a more effective ligand for copper-catalyzedcouplingreaction of (hetero)aryl halides with 1-alkynes than previously reported ones. Only 3 mol % CuCl and DMPPO are required to make the coupling complete at 100 °C (for bromides) and 80 °C (for iodides). Both (hetero)aryl and alkyl substituted 1-alkynes worked well under these conditions
N 1 -(2,6-二甲基苯基)- N 2 -(吡啶-2-基甲基)草酰胺 (DMPPO) 被发现是铜催化的(杂)芳基卤化物与 1-炔烃偶联反应的更有效配体以前报道过的。仅需 3 mol% CuCl 和 DMPPO 即可在 100 °C(溴化物)和 80 °C(碘化物)下完成偶联。(杂)芳基和烷基取代的 1-炔烃在这些条件下都表现良好,导致内部炔烃的形成具有很大的多样性。