1422012-77-8Relevant academic research and scientific papers
A novel approach for the synthesis of β-keto esters: One-pot reaction of carboxylic acids with chlorosulfonyl isocyanate
Atmaca, Ufuk
, p. 220 - 227 (2020)
β-Keto esters were synthesized by direct carboxylation of various 4- and 5-oxo-carboxylic acid derivatives in the presence of chlorosulfonyl isocyanate in excellent yield under mild conditions. Additionally, optimization conditions were examined for synthesis β-keto esters. Finally, it has been found that trifluoroacetic acid is efficient in DCM under optimized conditions. This efficient one-pot novel method is very usefull, fair price and easy to handle of β-keto esters.
N-Heterocyclic carbene-catalyzed deaminative cross-coupling of aldehydes with Katritzky pyridinium salts
Kim, Inwon,Im, Honggu,Lee, Hyeonyeong,Hong, Sungwoo
, p. 3192 - 3197 (2020/04/08)
By employing an N-heterocyclic carbene (NHC) catalyst, we developed a versatile catalytic system that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts. Katritzky pyridinium salts behave as single-electron oxidants capable of generating alkyl radicals enabled by the redox properties of the enolate form of Breslow intermediates. The resultant alkyl radical undergoes efficient recombination with the NHC-bound aldehyde-derived carbonyl carbon radical for the formation of a C-C bond. The mild and transition metal-free reaction conditions tolerate a broad range of functional groups, and its utility has been further demonstrated by the modification of a series of peptide feedstocks and application to the three-component dicarbofunctionalization of olefins.
Synthesis of α-alkylated β-ketoesters by alkoxycarbonylation/ Michael addition domino reaction
Wahl, Benoit,Philipson, Yann,Bonin, Hélène,Mortreux, André,Sauthier, Mathieu
, p. 1547 - 1552 (2013/03/14)
The palladium-catalyzed alkoxycarbonylation of an α-chloro ketone can be efficiently combined to a Michael addition reaction in a new two-step domino reaction, allowing the synthesis of original highly functionalized α-alkylated β-ketoesters. The scope of the reaction was extended to several α-chloro ketones and Michael acceptors with moderate to very good yields.
