Category: 33166-79-9

Photochemical hydrogen abstraction as a radiationless transition in the photoketonization of β-dicarbonyl compounds was written by Nikolov, G.;Markov, P.. And the article was included in Journal of Photochemistry in 1981.COA of Formula: C12H14O3 This article mentions the following:

The photoketonization of 2 series of β-dicarbonyl compounds, namely, RC₆H₄COCH₂CO₂Et (R = H, p-Me, m-NO₂, p-Cl, etc.) and R¹COCHR²CO₂R³ (R¹ = Et, hexyl, Me; R² = H, Me, Et, CH₂Ph; R³ = Et, C₅H₁₁, cyclopentylmethyl, etc.), was treated in terms of the tunnel effect theory as a radiationless transition. These series showed a strong dependence of the overall photoketonization reaction rate constants on the reaction coordinate, which is constant for a given series. The rate constants of the 2nd series were reproduced using a single value of the enol OH bond energy D_OH, whereas the rate constants k_r of the 1st series show a marked dependence of D_OH and a correlation between log k_r and D_OH was found. The successful application of the tunnel effect theory to the photoketonization processes of the compounds studied was interpreted to imply that these processes may in fact involve through-space photochem. H migration which is governed by the tunnel effect. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9COA of Formula: C12H14O3).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.COA of Formula: C12H14O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Lewis acid-catalyzed one-pot sequential reaction for the synthesis of α-halogenated β-keto esters was written by Cui, Han-Feng;Dong, Ke-Yan;Nie, Jing;Zheng, Yan;Ma, Jun-An. And the article was included in Tetrahedron Letters in 2010.Category: esters-buliding-blocks This article mentions the following:

A Lewis acid-catalyzed one-pot sequential transformation of β-keto esters, aromatic aldehydes, and NCS/NBS was reported. The reaction proceeds by way of Knoevenagel condensation/Nazarov cyclization/halogenation to give α-chloro- and α-bromo-β-keto esters in moderate yields with high diastereoselectivities. However, several aromatic aldehydes with electron-withdrawing substituents afforded unexpected α,β’-dichloro-β-keto esters in good to high yields. In the experiment, the researchers used many compounds, for example, Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9Category: esters-buliding-blocks).

Ethyl 3-oxo-3-(m-tolyl)propanoate (cas: 33166-79-9) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics