Pyridinic-Nitrogen Containing Ordered Mesoporous Carbons as Nad(P)H Mimics for Borrowing Hydrogen Reactions

Titania Nanoparticle Catalysed N‐Alkylation of Amines by Hydrogen Auto‐Transfer Mechanisms

“…[7d,15a-c] For instance, Ti 4 + and Ti 3 + are highly prevalent when the particle size reduces below 100 nm. Recently, Corma and co-workers [16,17] have demonstrated using an Au/CeO 2 catalyst that the benzyl alcohol undergoes a rapid and reversible binding to the oxide surface to give the alkoxides. Similarly, the benzyl alcohol 1 a would form an alkoxide to generate surface adsorbed species I in the case of TiO 2 (Scheme 5).…”

TiO2 (P25) nanoparticle catalyzed C-alkylation and quinoline synthesis via the borrowing hydrogen method

“…49 Nitrogen-incorporated mesoporous carbons were explored in recent times for their ability to promote BH reactions. 50,51 Recently, gold nanoparticles deposited on TiO 2 were shown to readily catalyze the mono-alkylation of amines with alcohols as well as the direct condensation of nitroarenes with alcohols to form secondary or tertiary amines. 52,53…”

“…49 Nitrogenincorporated mesoporous carbons were explored in recent times for their ability to promote BH reactions. 50,51 Recently, gold nanoparticles deposited on TiO 2 were shown to readily catalyze the mono-alkylation of amines with alcohols as well as the direct condensation of nitroarenes with alcohols to form secondary or tertiary amines. 52,53 Herein, we demonstrate that TiO 2 or titanium dioxide, a commonly used commercial catalyst in organic chemistry, is an effective catalyst for the C-C bond formation of ketones with aryl alcohol to produce the corresponding C-alkylated compounds (Scheme 1) in the absence of any external hydrogen source.…”