Synthesis of 2,3-bis(benzoyl)butanedioic acid 1,4-diethyl ester derivatives via cerium ammonium nitrate-mediated oxidative coupling reaction of β-oxobenzenepropanoic acid esters was written by Song, Jia-Nan;Li, Xin-Sheng;Xu, Dong-Cheng;Cai, Ling-Ling. And the article was included in Youji Huaxue in 2008.Category: esters-buliding-blocks This article mentions the following:
A method for the synthesis of the above-mentioned title compounds (diketone dimers) is reported here. A mild method for preparation of 1,4-diketone via an intermol. coupling of substituted aryl β-keto esters by use of cerium ammonium nitrate in CH3CN/H2O is described. The procedure provided a convenient method for the synthesis of such 1,4-diketones in up to 92% yields. The reaction mechanism was discussed. 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. Esters contain a carbonyl center, which gives rise to 120° C–C–O and O–C–O angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C–O–C bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics