Instantaneous Carbon−Carbon Bond Formation Using a Microchannel Reactor with a Catalytic Membrane

Abstract

Instantaneous catalytic carbon-carbon bond forming reactions were achieved in a microchannel reactor having a polymeric palladium complex membrane. The catalytic membrane was constructed inside the microchannel via self-assembling complexation at the interface between the organic and aqueous phases flowing laminarly, where non-cross-linked polymer-bound phosphine and ammonium tetrachloropalladate dissolved, respectively. A palladium-catalyzed coupling reaction of aryl halides and arylboronic acids was performed using the microchannel reactor to give quantitative yields of biaryls within 4 s of retention time in the defined channel region.

Palladium(II) on Functionalized NiFe2O4: An Efficient and Recyclable Phosphine-Free Heterogeneous Catalyst for Suzuki Coupling Reaction

“…In recent years, various efforts have been made to support palladium catalysts, on various materials such as activated carbon [8][9][10], clay [11], diatomite [12], dendrimers [13], silica [14], zeolite [15], polymer resin [16], microcapsules and resin [17,18]. However, most of the heterogeneous palladium catalysts show lesser reactivity than homogeneous ones owing to their leaching of palladium from the supports.…”

Development of highly transparent Pd-coated Ag nanowire electrode for display and catalysis applications

“…Although Pd coating on Ag nanowires is expected to reduce haze, a certain level of sheet resistance increase is also expected for Ag@Pd films compared to that of pristine Ag nanowire. This is mainly due to differences in bulk resistivity of Pd (105.4 nΩ·m) and Ag (15.87 nΩ·m) metals.Additionally, this new Ag@Pd core-shell system can render excellent catalytic activities as a result of their high aspect ratios and they can reduce the cost of catalysis since a very thin layer (shell) requires little amount of Pd material.It's well known in the literature that palladiumderivatives and Pd-based nanostructurescan be used as catalysts in numerous chemical reactions and syntheses [20][21][22].In particular, nanostructured palladium catalysts increase the rate and yield of the reactions significantly where surface area is a key function [21]. On the other hand, fuel cell catalysts with Pd content produce higher energy than those without Pd in it [23].…”

Scaling up of continuous-flow, microwave-assisted, organic reactions by varying the size of Pd-functionalized catalytic monoliths

“…Recently, application of magnetic nanoparticles as media that can be heated in an electromagnetic field, was reported to be ideal for use inside microfluidic fixed-bed reactors for chemical synthesis [10]. A new concept to build the catalytic membrane inside a microchannel reactor was demonstrated by Uozumi et al [11], where carbon–carbon bond forming reactions of aryl halides and arylboronic acids under microflow conditions can be achieved quantitatively within 4 s residence time. However, the stability of the catalytic membrane was not discussed.…”