Aldol condensation of refluxing acetone on CaC₂ achieves efficient coproduction of diacetone alcohol, mesityl oxide and isophorone

Abstract

The refluxing reaction of acetone on CaC2 realizes an efficient coproduction of diacetone alcohol, mesityl oxide, isophorone and C2H2.

The Stepwise Formation of {Gd4} Clusters with Magnetocaloric Effect, Accompanied by In Situ Condensation Cyclization Reactions

“…The phenomenon may be due to the reason that a βhydroxy carbonyl intermediate is formed by acetone undergoing aldehyde alcohol condensation. 51,52 Then, it reacts with bptm to form L 1 through condensation cyclization reaction in the presence of Gd 3+ ions (Figure 3c). 53 For tracking the variation of various intermediates during the reaction, ESI-MS was used for characterization.…”

Structured hydroxyapatite composites as efficient solid base catalysts for condensation reactions

“…View Article Online of 22 h under solvent-free conditions at 3 mol% catalyst loading, conditions typically described in literature (see Table S2 † for an overview of literature results). [40][41][42][43][44][45][46] The results, presented in Table 3, show that no conversion was obtained in the absence of a catalyst after 2 or 6 h and a 6% yield of the desired product at 8% conversion after 22 h (entry 1). Entries 2 to 6 are commercially available solid base catalysts such as MgO, TiO 2 , CaCO 3 and HAP, and are included for benchmarking.…”

“…Generally, catalyst loadings of around 10 mol% or higher are described for the self-aldol condensation reactions (Table S2 †). 40,[45][46][47][48] Typically, base catalysts are sensitive to atmospheric CO 2 and moisture, and deactivation of basic sites occurs to a greater extent compared to acid catalysts. 19,39 Moreover, the condensation reaction generates…”

In Situ Metal–Ligand Reactions under Solvent-Dependent Hydro(solvo)thermal Conditions: Structures, Mass Spectrometry, and Magnetism

“…However, the formation of HL 4–6 involves an interesting multistep series of condensation reactions. Initially, the bimolecular acetone/butanone undergoes aldol condensation to form a β-hydroxy carbonyl compound catalyzed by alkaline conditions. , Then, like acetylacetone, it reacts with H 2 L 0 and Dy III and forms HL 4–6 through two dehydration/condensation reactions …”

“…Initially, the bimolecular acetone/butanone undergoes aldol condensation to form a β-hydroxy carbonyl compound catalyzed by alkaline conditions. 30,31 Then, like acetylacetone, it reacts with H 2 L 0 and Dy III and forms HL 4−6 through two dehydration/ condensation reactions. 32 ESI-MS of Complexes.…”