Mizoroki–Heck and Suzuki–Miyaura reactions mediated by poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid)‐stabilized magnetically separable palladium catalyst

Abstract

Funding information Semnan University Research CouncilThe purpose of this work was to synthesize and characterize a new magnetic polymer nanosphere-supported palladium(II) acetate catalyst for reactions requiring harsh conditions. In this regard, an air-stable, moisture-stable and highly efficient heterogenized palladium was synthesized by the coordination of palladium(II) acetate with poly(2-acrylamido-2-methyl-1-propanesulfonic acid)-grafted modified magnetic nanoparticles with a core-shell structure.The structure of the newly developed catalyst was characterized using various techniques. The catalytic activity of the resultant nano-organometallic catalyst was evaluated in Mizoroki-Heck and Suzuki-Miyaura reactions to afford the corresponding coupling products in good to excellent yields. High selectivity as well as outstanding turnover number (14 143, 4900) and turnover frequency (28 296, 7424) values were recorded for the catalyst in Suzuki-Miyaura and Mizoroki-Heck reactions, respectively. Magnetic separation and recycling of the catalyst for at least six runs became possible without any significant loss of efficiency or any detectable palladium leaching.

Cobalt supported on dendronized magnetic nanoparticles: A new highly efficient and recyclable catalyst for the Mizoroki–Heck cross‐coupling reaction

“…The results are consistent with the heterogeneous nature of the catalyst, [45] and establish the strong attachment of cobalt nanoparticles to the MNP@PAMAM surface. Therefore, the proof of heterogeneity of the catalyst is an essential task.…”

“…[45] Therefore, due to its crucial role, it should exhibit high efficiency. [45] Therefore, due to its crucial role, it should exhibit high efficiency.…”

Magnetic apple seed starch functionalized with 2,2′‐furil as a green host for cobalt nanoparticles: Highly active and reusable catalyst for Mizoroki–Heck and the Suzuki–Miyaura reactions

“…X‐ray diffraction (XRD) analysis was used to obtain evidence for the presence of iron and cobalt. Characteristic peaks at around 30.5°, 35.9°, 43.5°, 53.9°, 57.2°, and 63° 2θ are clearly visible in all spectrums, which are related to the inverse cubic spinel structure of Fe 3 O 4 . As it is clear from Figure b and c, chemical modification decreased the intensity of the Fe 3 O 4 peaks but did not change the phase of magnetit nanoparticles.…”

“…Characteristic peaks at around 30.5°, 35.9°, 43.5°, 53.9°, 57.2°, and 63°2 θ are clearly visible in all spectrums, which are related to the inverse cubic spinel structure of Fe 3 O 4 . [28] As it is clear from Figure 2b and c, chemical modification decreased the intensity of the Fe 3 O 4 peaks but did not change the phase of magnetit nanoparticles. In Figure 2 SCHEME 1 Preparation of the catalyst b and c, a broad reflection in the region between 2θ = 15°a nd 2θ = 24°is related to the seed starch.…”

“…As expected, no further coupling reaction occurred, indicating that there was no leaching phenomenon here. The heterogeneous nature of the catalyst has been proven by the result, and it can be concluded that the attachment of cobalt to the MNP@Seed starch@FR surface is strong.…”