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
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。
An effective and inexpensive strategy for the Co(C9H9NO2)3catalyzed Sonogashira–Hagihara cross‐coupling reaction of arylbromides containing electron‐rich and electron‐poor substituents with terminal alkynes was demonstrated. The reaction proceeded smoothly in the presence of ethylene glycol as additive and K2CO3 as base in DMF under visible light illumination, and 23 alkyne products were afforded
证明了一种有效且廉价的Co(C 9 H 9 NO 2)3催化Sonogashira–Hagihara交叉偶联反应的方法,该反应使含有富电子和贫电子取代基的芳基溴化物与末端炔烃反应。在乙二醇作为添加剂和K 2 CO 3的存在下,反应平稳进行在可见光照射下作为DMF的碱,提供了23种炔烃产品,收率中等至优异,其中包括4种新的二芳基乙炔。与高成本的钯催化剂相比,钴是一种廉价的催化剂,具有大量技术生产,并且无钯/无铜催化体系不仅提供了反应条件温和的高效工艺,而且还提高了底物基团的耐受性。
Aerobic Cu and amine free Sonogashira and Stille couplings of aryl bromides/chlorides with a magnetically recoverable Fe3O4@SiO2 immobilized Pd(II)-thioether containing NHC
added CC cross coupling reactions; Sonogashira and Stille couplings were achieved at milderconditions in the catalytic presence of a magneticallyrecoverable heterogeneous catalyst Fe3O4@SiO2@NHC^SPh-Pd(II). The catalyst was earlier reported for Suzuki-Miyaura reaction, and as an extension of its catalytic efficiency, the Stille and Sonogashira cross coupling reactionsunder aerobic condition has been