Syndiotactic Poly(aminostyrene)‐Supported Palladium Catalyst for Ketone Methylation with Methanol

Abstract

Palladium nanoparticles immobilized on an amino‐functionalized syndiotactic polystyrene (sPS‐N) served as a novel recyclable catalyst for the dimethylation and cross methyl alkylation of a wide range of ketones with methanol as the methylation agent. This heterogeneous catalyst (Pd@sPS‐N) was highly robust and showed excellent thermal stability and chemical resistance. It not only showed remarkably high activity, but it could also be easily recovered by filtration without loss of activity.

Palladium on carbon-catalyzed α-alkylation of ketones with alcohols as electrophiles: Scope and mechanism

“…[11,12] Recently, a different strategy where alcohols are used as masked electrophiles, leading to water as the only byproduct, has attracted attention due to its potential as a greener alternative. [13][14][15][16][17][18][19] A variety of transition-metals has been implemented as catalysts for the α-alkylation of ketones with alcohols in both homogeneous [20][21][22][23][24][25][26][27][28][29][30] and heterogeneous systems [31][32][33][34][35][36][37][38][39][40][41]. Typically, reaction temperatures above 100 °C and 1-2 mol% catalyst loadings are required.…”

Naphthyridine‐based iridium complexes: Structures and catalytic activity on alkylation of aryl ketones

“…The pathway of this methylation of propiophenone with MeOH may proceed according to the previously reported manner . Presumably, the first step is the dehydrogenation of methanol catalyzed by the metal complex resulting in the formation of formaldehyde and a metal‐hydride species (denoted as [Ir]‐H).…”

“…C ‐Alkylation of ketones with alcohols as alkylating agents via a borrowing hydrogen manner is of great interest to chemists due to the atom economy and environmental benignity of this reaction . Thus, complex 4 was first tested as a precatalyst in this regard.…”

Linear-Organic-Polymer-Supported Iridium Complex as a Recyclable Auto-Tandem Catalyst for the Synthesis of Quinazolinones via Selective Hydration/Acceptorless Dehydrogenative Coupling from o-Aminobenzonitriles

“…Linear-organic-polymer-supported metal complexes have been widely applied in sensors, electrochromic materials, electroluminescence, magnetic materials, organic semiconductors, and cathode interlayers; however, their utilization as heterogeneous autotandem catalysts, which could activate multiple and mechanistically distinct reactions in a single reactor, has remained unexplored due to the fact that compared with inorganic and inorganic/organic hybrid materials, linear organic polymers usually show low thermal stability and chemical resistance at high temperature, which easily causes severe leaching and the deactivation of catalysts …”