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
Dual gold/photoredox-catalyzed C(sp)–H arylation of terminal alkynes with diazonium salts
作者:Adrian Tlahuext-Aca、Matthew N. Hopkinson、Basudev Sahoo、Frank Glorius
DOI:10.1039/c5sc02583d
日期:——
The arylation of alkyl and aromatic terminal alkynes by a dual gold/photoredoxcatalytic system is described. Using aryldiazonium salts as readily available aryl sources, a range of diversely-functionalized arylalkynes could be synthesized under mild, base-free reaction conditions using visible light from simple household sources or even sunlight. This process, which exhibits a broad scope and functional
描述了金/光氧化还原双催化系统对烷基和芳族末端炔烃的芳基化。使用芳基重氮盐作为容易获得的芳基源,可以使用来自简单家庭来源的可见光甚至阳光,在温和、无碱的反应条件下合成一系列不同官能化的芳基炔。该过程表现出广泛的范围和官能团耐受性,将双金/光氧化还原催化的转化范围扩大到涉及 C-H 键功能化的转化范围,并证明了该概念在以下条件下获得 Au I / Au III氧化还原化学的潜力:温和的氧化还原中性条件。
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
Cross-coupling reactivity of 1,1-dichloroalkenes under palladium catalysis: domino synthesis of diarylalkynes
作者:L. N. Rao Maddali、Suresh Meka
DOI:10.1039/c7nj05107g
日期:——
An efficientsynthesis of diarylalkynes was achieved from the domino cross-coupling reaction of 1,1-dichloroalkenes with triarylbismuth reagents under palladium-catalyzed conditions. Under the established palladium protocol, 1,1-dichloroalkenes demonstrated hitherto unknown remarkable cross-coupling reactivity with organometallic triarylbismuth reagents to furnish functionalized diarylalkynes.