[EN] PROCESS FOR PRODUCING ALPHA-KETOCARBOXYLIC ACID<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDE ALPHA-CÉTOCARBOXYLIQUE
申请人:SUMITOMO CHEMICAL CO
公开号:WO2011162404A1
公开(公告)日:2011-12-29
The present invention relates to a process for producing an α-ketocarboxylic acid, comprising a step of oxidizing an α-ketoaldehyde by mixing a base, carbon dioxide, the α-ketoaldehyde and a compound represented by formula (2-1).
Synthesis of novel synthetic intermediates from the reaction of benzimidazole and triazole carbenes with ketenimines and their application in the construction of spiro-pyrroles
作者:Jun-Ming Mo、Yang-Guang Ma、Ying Cheng
DOI:10.1039/b915215f
日期:——
were synthesized in good yields from the reaction of benzimidazole and triazole carbenes with ketenimines. Upon treatment with a base, both salts were converted into novel 1,3-dipoles which underwent [3+2] cycloaddition reactions with electron-deficient alkynes and allenes to produce benzimidazole-spiro-pyrroles or triazole-spiro-pyrroles. This work provides novel synthons for the construction of multifunctional
A novel method for producing methionine without using hydrogen cyanide as a raw material has been demanded. A method for producing methionine including a step A of oxidizing 4-methylthio-2-oxo-1-butanal in the presence of an alcohol; a step B of hydrolyzing a 4-methylthio-2-oxo-butanoic acid ester obtained in the step A; and a step C of subjecting 4-methylthio-2-oxo-butanoic acid obtained in the step B to reductive amination.
The present invention relates to a process for producing an α-ketocarboxylic acid, comprising a step of oxidizing an α-ketoaldehyde by mixing a base, carbon dioxide, the α-ketoaldehyde and a compound represented by formula (2-1).
N-Heterocyclic Carbene-Catalyzed Umpolung of Cyclopent-4-ene-1,3-diones for Activated Olefin–Isatin Cross-Coupling
作者:Shilpa Barik、Sayan Shee、Akkattu T. Biju
DOI:10.1021/acs.orglett.2c02413
日期:2022.8.19
carbene (NHC)-catalyzed umpolung of cyclopent-4-ene-1,3-diones that proceeds via the generation of nucleophilic deoxy-Breslow intermediates is presented. The carbene generated from a commercially available thiazoliumsaltcatalyzed the cross-coupling between cyclopent-4-ene-1,3-diones and isatins to furnish the functionalized oxindoles in moderate to good yields with good functional group compatibility