Unprecedented Substoichiometric Use of Hazardous Aryl Diazonium Salts in the Heck-Matsuda Reaction via a Double Catalytic Cycle
作者:François Le Callonnec、Eric Fouquet、François-Xavier Felpin
DOI:10.1021/ol200752x
日期:2011.5.20
The first Heck-Matsudareaction using a catalyticamount of diazoniumsalts has been discovered. The reaction proceeds through an unprecedented double catalytic cycle in which the electrophile is in situ generated through the reaction advancement. This concept features mild and safe conditions as hazardous aryl diazoniumsalts are not isolated anymore. Importantly, this sustainable procedure generates
Palladium Nanoparticles Supported on Sulfonic Acid Functionalized Silica as Trifunctional Heterogeneous Catalysts for Heck and Suzuki Reactions
作者:Nicolas Oger、Erwan Le Grognec、François-Xavier Felpin
DOI:10.1002/cctc.201500179
日期:2015.7.13
successfully achieved by using trifunctional heterogeneous catalysts bearing Brønsted acid and metal active sites. The trifunctional materials were prepared by adsorption of palladium nanoparticles, generated by reduction of a solution of Pd(OAc)2 onto a commercially available sulfonic acid functionalized silica. These new trifunctional catalysts act as a 1) proton donor for the diazotization step, 2) counterion
Heck-Matsuda Arylation of Olefins Through a Bicatalytic Approach: Improved Procedures and Rationalization
作者:Nicolas Oger、François Le Callonnec、Denis Jacquemin、Eric Fouquet、Erwan Le Grognec、François-Xavier Felpin
DOI:10.1002/adsc.201301144
日期:2014.3.24
The scope of the palladium‐catalyzed Heck–Matsudareaction, proceeding through the catalytic activation of anilines into the corresponding diazoniumsalts, has been considerably extended and is now working with deactivated electrophiles. Two different procedures, using catalyticamounts of both palladium and acid, have been optimized allowing the concept of bicatalysis to cover the complete electronic
Multicomponent, Flow Diazotization/Mizoroki-Heck Coupling Protocol: Dispelling Myths about Working with Diazonium Salts
作者:Kumara S. Nalivela、Michael Tilley、Michael A. McGuire、Michael G. Organ
DOI:10.1002/chem.201402092
日期:2014.5.26
A single pass flowdiazotization/Mizoroki–Heckprotocol has been developed for the production of cinnimoyl and styryl products. The factors that govern aryl diazonium salt stability have been examined in detail leading to the development of a MeOH/DMF co‐solvent system in which the diazoniumsalts can be generated in the presence of all other reaction components and then coupled selectively to give
Continuous-Flow Heck–Matsuda Reaction: Homogeneous versus Heterogeneous Palladium Catalysts
作者:Nicolas Oger、Erwan Le Grognec、François-Xavier Felpin
DOI:10.1021/jo501468z
日期:2014.9.5
investigations of the Heck–Matsuda reaction carried out by continuous-flow chemistry between aryl diazonium salts generated in situ and methyl acrylate. Our optimized procedures enable sequential aniline diazotization/palladium-catalyzed Heck–Matsuda reaction using either Pd(OAc)2 or PdEnCat 30 as respectively a homogeneous or a heterogeneous source of palladium. This safe chemistry that does not require