Highly Dispersed Palladium Nanoparticles on Mesocellular Foam: An Efficient and Recyclable Heterogeneous Catalyst for Alcohol Oxidation

Cycloisomerization of Acetylenic Acids to γ-Alkylidene Lactones using a Palladium(II) Catalyst Supported on Amino-Functionalized Siliceous Mesocellular Foam

“…24,25,29 We have recently reported on the preparation of a heterogeneous catalyst based on Pd nanoparticles immobilized on amino-functionalized siliceous mesocellular foam (Pd(0)-AmP-MCF). 30,31 Mesocellular foam (MCF) is a mesoporous material that has proven to be an excellent support for both chemical as well as biological catalysts, mainly due to its high surface area, high pore volume and adjustable pore size. [32][33][34] Several organic transformations have successfully been accomplished with our novel Pd(0)-catalyst, such as aerobic oxidation of primary and secondary alcohols, 31 transfer effect of the change in the different reaction parameter, the reaction time for the screen was chosen to 1 h. The optimization of the reaction conditions commenced with a screening of a series of bases.…”

The benzaldehyde oxidation paradox explained by the interception of peroxy radical by benzyl alcohol

“…Thus, a goal of many investigations has been to increase the selectivity of the intermediate product(s), even at the expense of activity [2][3][4] . One well-studied group of systems that demonstrate this selective oxidation is the aerobic oxidation of primary alcohols to afford aldehydes, because aldehydes are important intermediates that find application in the synthesis of many pharmaceuticals, agrochemicals and perfumes 3,[5][6][7][8] . Benzyl alcohol is one of the most widely studied substrates 6,9,10 .…”

Combined heterogeneous metal/organic catalysts for eco-friendly synthesis

“…Among the reactions explored, we had developed an allylic alcohol oxidation/Michael/ carbocyclization catalytic relay using a bench-stable palladium complex (Pd(PPh 3 ) 4 ) and a simple chiral amine with molecular oxygen as the terminal oxidant [48]. Palladium is a powerful and versatile transition metal, which can be immobilized on various solid supports and next be used as a heterogeneous catalyst for efficient chemical reactions [49][50][51][52][53][54][55][56]. In this context, we recently disclosed that enantioselective carbocyclizations could be performed by the synergistic action of a heterogeneous palladium catalyst and a chiral amine co-catalyst [57].…”