Perfluoro-tagged, phosphine-free palladium nanoparticles supported on silica gel: application to alkynylation of aryl halides, Suzuki–Miyaura cross-coupling, and Heck reactions under aerobic conditions
cross-coupling, as well as in the Heck reaction between methyl acrylate and aryl iodides is described. The reactions are carried out under aerobic and phosphine-free conditions with excellent to quantitative product yields in each case. The catalysts are easily recovered and reused several times without significant loss of activity. The alkynylation of aryl halides (under copper-free conditions) and the Suzuki–Miyaura
Nickel-catalyzed oxidative decarboxylative coupling reactions between alkynyl carboxylic acids and arylboronic acids
作者:Ju-Hyeon Lee、Gabriel Charles Edwin Raja、Yujeong Son、Jisun Jang、Jimin Kim、Sunwoo Lee
DOI:10.1016/j.tetlet.2016.09.054
日期:2016.10
Nickel-catalyzed decarboxylative coupling reactions between aryl alkynyl carboxylic acids and arylboronicacids were developed. When aryl alkynyl carboxylic acids were reacted with arylboronicacids in the presence of NiCl2 (10 mol %), 2,2′-bipyridine (20 mol %), Na2CO3 (1.0 equiv), and Ag2CO3 (1.0 equiv) in DMF at 80 °C for 18 h, the corresponding diaryl alkynes products were formed in moderate to
开发了镍催化的芳基炔基羧酸和芳基硼酸之间的脱羧偶联反应。在NiCl 2(10 mol%),2,2'-联吡啶(20 mol%),Na 2 CO 3(1.0当量)和Ag 2 CO 3(1.0 )存在下,芳基炔基羧酸与芳基硼酸反应当量)在DMF中于80°C放置18 h,相应的二芳基炔烃产物以中等至良好的产率形成。
Electrochemical esterification reaction of alkynes with diols <i>via</i> cleavage of carbon–carbon triple bonds without catalyst and oxidant
作者:Pei-Long Wang、Hui-Zhi Shen、Hui-Hui Cheng、Hui Gao、Pin-Hua Li
DOI:10.1039/d0gc02193h
日期:——
as it is catalyst-free, oxidant-free, and additive-free and shows atom-economy. This is the first example of an electrochemical reaction via cleavage of carbon–carbon triple bonds. Meanwhile, this is also the first example of a carbon–carbon triple bond cleavage reaction of alkynes with diols.
Pd nanoparticles embedded into MOF‑808: An efficient and reusable catalyst for Sonogashira and Heck cross-coupling reactions
作者:Zesheng Zhao、Jie Wang、Xiaoli Zhang、Taofeng Lin、Jianwei Ren、Wan Pang
DOI:10.1016/j.tetlet.2022.153849
日期:2022.6
prepared to effectively catalyze the Sonogashira and Heckreactions without the presence of organic phosphine ligands. The results showed that the developed catalyst provided an environment-friendly reaction condition for these two reactions with the existence of a variety of functional groups and substrates. In addition, the Pd@MOF-808 catalyst could be easily recovered and reused for up to 5 times
Nickel-Catalyzed Sonogashira C(sp)–C(sp<sup>2</sup>) Coupling through Visible-Light Sensitization
作者:Da-Liang Zhu、Ruijie Xu、Qi Wu、Hai-Yan Li、Jian-Ping Lang、Hong-Xi Li
DOI:10.1021/acs.joc.0c01177
日期:2020.7.17
efficient method for visible-light-initiated, nickel-catalyzed Sonogashira C(sp)–C(sp2) coupling has been developed via an energy-transfer mode. Thioxanthen-9-one as a photosensitizer could significantly accelerate the arylation of alkynes with a wide range of (hetero)aryl halides in high yields. The cross-couplingreaction undergoes the stepwise oxidative addition of an arylhalide to nickel(0), transmetalation