Gas-phase base-catalyzed Claisen—Schmidt reactions of the acetone enolate anion with various para-substituted benzaldehydes

Lewis base-catalyzed reactions of cyclopropenones: novel synthesis of mono- or multi-substituted allenic esters.

The reactions of cyclopropenones with nucleophiles (H2O or methanol) could be catalyzed by nitrogen-containing Lewis bases or phosphorus-containing Lewis bases, affording the corresponding mono- or multi-substituted allenic esters in moderate to excellent yields.

Optimization of Two-Dimensional Flows with Homogeneous and Heterogeneously Catalyzed Gas-Phase Reactions

Chemically reacting gaseous flows in catalytic monoliths are numerically investigated to mathematically optimize product yields by the variation of operating conditions and catalyst loading. The fluid dynamics of the single monolith channel is modeled by the two-dimensional boundary layer equations (BLEs), a system of parabolic partial differential equations (PDEs) with highly nonlinear boundar...

Efficient base catalyzed alkylation reactions with aziridine electrophiles.

N-Mesitylene sulfonyl and N-tosyl aziridines have been identified as effective electrophiles in alkylation reactions of carbon acids catalyzed by the organic phosphorine base BEMP; yields of up to 99% for a range of pro-nucleophiles under mild reaction conditions are reported.

Enolate Ions and Enols Halogenation Reactions Alkylation Reactions Condensation Reactions Enolate Ions from -Dicarbonyl Compounds Other Reactions of Enolate Ions and Enols

18.1 Enolate Ions and Enols We described in Chapters 13 and 16 that the C=O group of carbonyl compounds is reactive to attack by both nucleophiles (N:) and electrophiles (E+). We also saw in Chapter 13 that the C=O group causes Hs attached to its α-C (H-Cα-C=O) to be unusually acidic. As a result, these α-CH's are removed by bases giving enolate ions (-:Cα-C=O) Figure 18.01) that can react as n...

Zirconocene-catalyzed reactions of alkenyl-substituted enol ethers.