Two vanadium-containing Keggin silicopolyoxotungsto compounds K5SiVW11O40 and K6SiV2W10O40 were synthesized characterized. They incorporated in a superporous hydrogel constitute by prop-2-enamide propenoic acid as initial monomers bis-acrylamide cross-linking moiety. Materials characterized several techniques. According to FTIR 51V MAS-NMR, the (SiVxW12-xO40)(4+x)- anions are main species prese...

β -Acetamido ketones are valuable building blocks for the preparation of β -amino ketones or β -amino alcohols such as the antibiotic nikkomycins [1] and neopolyoxines [2]. α-Acetamido ketones are obtained in the Dakin-West reaction [3] and β -acetamido ketones by the Iqbal route. In the latter, an aromatic aldehyde, an enolizable ketone and acetonitrile are condensed in the presence of acetyl ...

The oxidation of cumene and following cleavage hydroperoxide (CHP) with sulfuric acid (Hock rearrangement) is still, by far, the dominant synthetic route to produce phenol. In 2020, global phenol market reached a value 23.3 billion US$ projected compound annual growth rate 3.4% for 2020–2025. From ecological economical viewpoints, key step this process CHP. One sought-after way likewise reduce ...

Dehydration of glycerol was performed over heteropoly acids (HPA), viz., silicotungstic acid (H-SiW), phosphotungstic acid (H-PW), and phosphomolybdic acid (H-PMo), supported high surface area γ-alumina (HSAI-S25) catalysts. Various physico-chemical studies of these supported catalysts indicate high dispersion of the active (HPA) species on the support surface. It was observed that the catalyst...