Pd-loaded NaY zeolite as a highly active catalyst for ligandless Suzuki–Miyaura reactions of aryl halides at low Pd loadings under aerobic conditions

Abstract

The Pd(NH 3 ) 4 2+ -loaded NaY zeolite was found to be a highly active catalyst precursor for Suzuki-Miyaura (SM) reactions of aryl bromides and aryl chlorides at low Pd concentrations in air. Aryl bromides and arylboronic acids can couple effectively both in pure water and in N,Ndimethylacetamide/water mixtures (1/1) within minutes with turnover frequencies (TOF) up to 4 × 10 5 h −1 . The presence of a minute amount of water was crucial for the success of the reaction with chloroarenes. The excess amounts of as-received zeolite provided the necessary water for the reaction. The results suggest that the combined use of the water-zeolite system may have a synergistic effect in the reaction.

Anchoring of palladium(II) in chemically modified mesoporous silica: An efficient heterogeneous catalyst for Suzuki cross-coupling reaction

“…Pd incorporated NaY zeolite [38] and Pd/CeO 2 [39] have been used as heterogeneous catalyst in cross-coupling reactions. Cai et al have used MCM-41 supported sulfur palladium(0) complex in Suzuki coupling reaction [40].…”

Preparation and Characterization of Pd Modified TiO2 Nanofiber Catalyst for Carbon–Carbon Coupling Heck Reaction

“…To help address the problem of recovery and recycling of the catalyst, different support materials have been and are still being investigated. The most attractive is Pd on carbon or carbon nanotubes [9][10][11]: Pd on metal oxide such as MgO, Al 2 O 3 , ZnO, ZrO 2 , and TiO 2 [5,[12][13][14][15], Pd on zeolites [16], Pd encapsulated in large organic structures (dendrimers) [17], and Pd on block copolymer micelles [18]. The supports tend to arrest Pd on the surface of a solid material or in an organic matrix, making it possible to stabilize the catalytically active palladium species and prevent sintering.…”

Room‐temperature Suzuki–Miyauracross‐coupling reaction with α‐diimine Pd(II) catalysts

“…reported a new bulky diimine ligand for Suzuki cross‐coupling reactions in water, which gave excellent yields of aryl iodides and bromides with low catalyst loading . Most of these reactions were performed at elevated temperatures (80–140°C) in traditional organic solvents …”