Enantioselective 1,1-Arylborylation of Alkenes: Merging Chiral Anion Phase Transfer with Pd Catalysis
作者:Hosea M. Nelson、Brett D. Williams、Javier Miró、F. Dean Toste
DOI:10.1021/jacs.5b00344
日期:2015.3.11
A palladium-catalyzed three-component coupling of α-olefins, aryldiazonium salts, and bis(pinacolato)diboron affords direct access to chiral benzylic boronic esters. This process is rendered highly enantioselective using an unprecedented example of cooperative chiralanionphasetransfer and transition-metal catalysis.
Synthesis of α‐Branched Enones via Chloroacylation of Terminal Alkenes
作者:Jungwon Kim、Sven Müller、Tobias Ritter
DOI:10.1002/anie.202309498
日期:2023.12.4
show the conversion of unactivated alkenes into α-branched α,β-unsaturated ketones (enones) and esters. Regioselective chloroacylation with acyl chlorides and chloroformates takes place under cooperative nickel/photoredox catalysis. Subsequent HCl elimination provides enones and α,β-unsaturated esters that are not accessible via the conventional acylation approaches that provide the other, linear constitutional
Palladium-Catalyzed Alkoxycarbonylation of Terminal Alkenes To Produce α,β-Unsaturated Esters: The Key Role of Acetonitrile as a Ligand
作者:Andrei V. Malkov、Nolwenn Derrien、Maciej Barłóg、Pavel Kočovský
DOI:10.1002/chem.201304798
日期:2014.4.14
A mild protocol has been developed for the PdII‐catalyzed alkoxycarbonylation of terminal olefins to produceα,β‐unsaturated esters with a wide range of substrates. Key features are the use of MeCN as solvent (and/or ligand) to control the reactivity of the intermediate Pd complexes and the combination of CO with O2, which facilitates the CuII‐mediated reoxidation of the Pd0 complex to PdII and prevents