Light‐Induced Gold‐Catalyzed Hiyama Arylation: A Coupling Access to Biarylboronates
作者:Jin Xie、Kohei Sekine、Sina Witzel、Petra Krämer、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201806427
日期:2018.12.17
photochemical gold‐catalyzed chemo‐selective Hiyama arylation of B,Si bifunctionalized reagents with diazonium salts, which is orthogonal to common strategies and therefore a unique tool for synthesis of valuable biarylboronates. With this new methodology a wide array of diversely functionalized sp2‐ and sp3‐hybridized biarylboronates were obtained. Notably, the synergism of gold catalysis with copper catalysis
Electro-alkynylation: Intramolecular Rearrangement of Trialkynylorganoborates for Chemoselective C(sp<sup>2</sup>)–C(sp) Bond Formation
作者:Arif Music、Constantin M. Nuber、Yannick Lemke、Philipp Spieß、Dorian Didier
DOI:10.1021/acs.orglett.1c01126
日期:2021.6.4
Linchpin Synthons: Metalation of Aryl Bromides Bearing a Potassium Trifluoroborate Moiety
作者:Gary A. Molander、Noel M. Ellis
DOI:10.1021/jo061324u
日期:2006.9.1
Aryl bromides bearing a potassium trifluoroborate moiety were subjected to lithium-halogen exchange at low temperature using a variety of alkyllithium reagents. A number of different electrophiles were evaluated in their reactions with the aryllithiums produced therein. Under carefully optimized conditions, potassium bromophenyl trifluoroborates afforded good to excellent yields of the corresponding alcohols (64-94% isolated yield) when aldehydes or ketones were used as the electophilic partner. Esters were unfortunately found to be unreactive.
Electrochemical Synthesis of Biaryls via Oxidative Intramolecular Coupling of Tetra(hetero)arylborates
作者:Arif Music、Andreas N. Baumann、Philipp Spieß、Allan Plantefol、Thomas C. Jagau、Dorian Didier
DOI:10.1021/jacs.9b12300
日期:2020.3.4
scope, scalability and robustness of this unconventional catalyst-free transformation, leading to functional-ized biaryls and ultimately furnishing drug-like small molecules as well as late stage derivatization of natural compounds. In addition, the observed selectivity of the oxidative coupling reaction is related to the electronic structure of the TABs through quantum-chemical calculations and experimental
Photocatalyzed Transition‐Metal‐Free Oxidative Cross‐Coupling Reactions of Tetraorganoborates**
作者:Arif Music、Andreas N. Baumann、Florian Boser、Nicolas Müller、Florian Matz、Thomas C. Jagau、Dorian Didier
DOI:10.1002/chem.202005282
日期:2021.3
salts undergo selective coupling reactions under blue light irradiation in the presence of catalytic amounts of transition‐metal‐free acridinium photocatalysts to furnish unsymmetrical biaryls, heterobiaryls and arylated olefins. This represents an interesting conceptual approach to forge C−C bonds between aryl, heteroaryl and alkenyl groups under smooth photochemical conditions. Computational studies