A Ball-Milling-Enabled Cross-Electrophile Coupling
作者:Andrew C. Jones、William I. Nicholson、Jamie A. Leitch、Duncan L. Browne
DOI:10.1021/acs.orglett.1c02096
日期:2021.8.20
cross-electrophile coupling of aryl halides and alkyl halides enabled by ball-milling is herein described. Under a mechanochemical manifold, the reductive C–C bond formation was achieved in the absence of bulk solvent and air/moisture sensitive setups, in reaction times of 2 h. The mechanical action provided by ball milling permits the use of a range of zinc sources to turnover the nickelcatalyticcycle, enabling
Copper-Catalyzed Coupling of Triaryl- and Trialkylindium Reagents with Aryl Iodides and Bromides through Consecutive Transmetalations
作者:Surendra Thapa、Santosh K. Gurung、Diane A. Dickie、Ramesh Giri
DOI:10.1002/anie.201407586
日期:2014.10.20
An efficient copper(I)‐catalyzed coupling of triaryl and trialkylindium reagents with aryl iodides and bromides is reported. The reaction proceeds at low catalyst loadings (2 mol %) and generally only requires 0.33 equivalents of the triorganoindium reagent with respect to the aryl halide as all three organic nucleophilic moieties of the reagent are transferred to the products through consecutive transmetalations
A new and efficientnickel-catalyzed alkylation of CAr–O electrophiles with B-alkyl-9-BBNs is described. The transformation is characterized by its functional group tolerance and provides a practical and versatile access to various Csp2–Csp3 bonds through Csp2–O substitution, without the restriction of β-hydride elimination. Moreover, the advantage of the newly developed method was demonstrated in
描述了一种新的,高效的镍催化的C Ar –O亲电试剂与B-烷基-9-BBN的烷基化反应。该转变的特征在于其对官能团的耐受性,并通过C sp2- O取代为各种C sp2- C sp3键提供了实用而通用的访问途径,而没有消除β-氢化物的限制。此外,新开发方法的优势在选择性和顺序的C–O键激活过程中得到了证明。
Nickel-Catalyzed Reductive Cross-Coupling of Aryl Triflates and Nonaflates with Alkyl Iodides
作者:Yuto Sumida、Takamitsu Hosoya、Tomoe Sumida
DOI:10.1055/s-0036-1588464
日期:2017.8
coupling of aryl triflates and nonaflates with alkyliodides using manganese(0) as a reductant is described. The method is applicable to the reductive alkylation of various aryl sulfonates, including o-borylaryl triflate, which enabled efficient construction of diverse alkylated arenes under mild conditions. A nickel-catalyzed cross-electrophile coupling of aryl triflates and nonaflates with alkyl iodides
C–F Activation for C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Coupling by a Secondary Phosphine Oxide (SPO)-Nickel Complex
作者:Valentin Müller、Debasish Ghorai、Lorena Capdevila、Antonis M. Messinis、Xavi Ribas、Lutz Ackermann
DOI:10.1021/acs.orglett.0c02609
日期:2020.9.4
A secondary phosphine oxide (SPO)-nickel catalyst allowed the activation of otherwise inert C–F bonds of unactivated arenes in terms of challenging couplings with primary and secondary alkyl Grignard reagents. The C–F activation is characterized by mild reaction conditions and high levels of branched selectivity. Electron-rich and electron-deficient arenes were suitable electrophiles for this transformation