Ag nanoparticles on mixed Al2O3–Ga2O3 supports as catalysts for the N-alkylation of amines with alcohols

Binary γ-Al2O3–α-Ga2O3 as supports of NiW catalysts for hydrocarbon sulfur removal

“…1b) showed a very sharp unimodal distribution. In particular, AlGa-25 displayed the highest surface area of the series and among materials prepared with similar methodology elsewhere [19,23]. Previous reports show that different Ga 2 O 3 phases are obtained from a wide variety of precipitating agents.…”

“…The Al 2 O 3 -Ga 2 O 3 samples (labeled AlGa-x, where x is the wt.% of Ga 2 O 3 ) were synthesized using a one-step precipitation method, modified from a previous report [19]. For each sample (x = 0, 25, 50, 75, and 100%), 2 g of support were obtained from Al(NO 3 ) 3 ·9H 2 O (Aldrich-Chemical, 99.99%) (14.7, 11.0, 7.3, 3.6 and 0 g) and Ga(NO 3 ) 3 ·8H 2 O (Aldrich-Chemical, 99.99%) (0, 2.1, 4.2, 6.4 and 8.5 g).…”

Applications of Metal Nanopore Catalysts in Organic Synthesis

“…Interestingly, secondary amines also gave high chemical yields in this process, while in some cases imine side products were also formed in trace to low amounts. Geukens et al 27 (3 mol%), and in the absence of a base, resulted in a 75% yield of three products with the following selectivities: imine (58%), amine (36%), and amide 7 (only 6%) (Table 2, entry 5). Zhu et al 28 used hydrotalcite-supported nano-gold (Au/HT) for the dehydrogenative synthesis of amides from alcohols and amines.…”

“…Various cyclic as well as aliphatic enones were studied and found to give a different composition of 1,2-, 1,4-and complete reduction products, depending on the structure of the enones. Cyclohex-2-en-1-one (27), in the presence of 0.16 equivalents of [(Ph 3 P)CuH] 6 , was treated with chlorotrimethylsilane (Me 3 SiCl), and water at room temperature in benzene-d 6 (C 6 D 6 ) to give cyclohexanone in 94% yield. In the absence of water, but in the presence of Me 3 SiCl, silyl…”

A silver NP-dispersed water extract of fly ash as a green and efficient medium for oxidant-free dehydrogenation of benzyl alcohols

“…Additionally, silver-based systems have been oen used for oxidation of alcohols. 26,27 Ivanova and co-workers designed Ag/SiO 2 and utilized it for the oxidant-free dehydrogenation of ethanol. 28 Moreover, Mitsudome et al successfully fabricated Ag/hydrotalcite catalysts for non-oxidant dehydrogenation of secondary alcohols.…”