Nickel-catalyzed anti-Markovnikov hydroarylation of alkenes
作者:Julia Nguyen、Andrea Chong、Gojko Lalic
DOI:10.1039/c8sc05445b
日期:——
We have developed a nickel-catalyzed hydroarylation of alkenesusing aryl halides as coupling partners. Excellent anti-Markovnikov selectivity is achieved with aryl-substituted alkenes and enol ethers. We also show that hydroarylation occurs with alkyl substituted alkenes to yield linear products. Preliminary examination of the reaction mechanism suggests irreversible hydrometallation as the selectivity
An efficient and simple one-pot procedure for selective etherification of 2-aryl-ethylalcohols has been achieved through Amberlyst 15-catalyzed reaction in dimethyl carbonate (DMC). Moreover, the polymer catalyst could be recovered and reused with no effect on its activity. The reaction mechanism involves the formation of phenonium ion which has been demonstrated by a C-C bond forming reaction. Theoretical studies are in agreement with and thus explain experimental results. (C) 2013 Elsevier Ltd. All rights reserved.
Suzuki–Miyaura Cross-Coupling of Potassium Alkoxyethyltrifluoroborates: Access to Aryl/Heteroarylethyloxy Motifs
作者:Nicolas Fleury-Brégeot、Marc Presset、Floriane Beaumard、Virginie Colombel、Daniel Oehlrich、Frederik Rombouts、Gary A. Molander
DOI:10.1021/jo3021665
日期:2012.11.16
The introduction of an alkoxyethyl moiety onto aromatic substructures has remained a long-standing challenge for synthetic organic chemists. The main reasons are the inherent instability of alkoxyethylmetallic species and the lack of general procedures to access them. A new method utilizing a cross-coupling strategy based on the exceptional properties of organotrifluoroborates has been developed, and the method allows an easy and efficient installation of this unit on a broad range of aryl and heteroaryl bromides.