We describe a robust one-pot cascade method for the synthesis of indole-3-carboxylic acids using isatins and DMSO a one-carbon translocation involving generation of α,β-unsaturated methylvinylsulfoxide followed by amide bond cleavage and ring closure. The methodology has been extended to afford anthranilic acid derivatives by tuning the reaction conditions in the presence of molecular oxygen. Importantly, easy access to commercially available drugs, including tropisetron, is demonstrated.
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http://dx.doi.org/10.1039/d3cc04443b | DOI Listing |
Org Lett
October 2024
Department of Otolaryngology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
A copper-catalyzed decarboxylative aminomethylation of indole-3-carboxylic acids with 1,2-oxazetidines has been developed, enabling the rapid synthesis of structurally diverse 3-aminomethylindoles in good to excellent yields. Remarkably, an unprecedented decarboxylative aminomethylation/cyclization cascade was further achieved by a combination of copper and iron salts to construct complex γ-carbolines with high efficiency. It is worth noting that one of the obtained products proved to be a good dual-emissive luminogen, exhibiting both aggregation-caused quenching and aggregation-induced emission.
View Article and Find Full Text PDFBMC Plant Biol
May 2024
Agricultural College, Shihezi University, Shihezi, 832003, Xinjiang, China.
Anabasis aphylla (A. aphylla), a species of the Amaranthaceae family, is widely distributed in northwestern China and has high pharmacological value and ecological functions. However, the growth characteristics are poorly understood, impeding its industrial development for biopesticide development.
View Article and Find Full Text PDFJ Agric Food Chem
March 2024
Centro de Espectroscopía de RMN (CERMN), Universidad de Alcalá (UAH), Campus Universitario Ctra. Madrid-Barcelona km 33.6, Alcalá de Henares, Madrid 28805, Spain.
β-Carbolines (βCs) are bioactive indole alkaloids found in foods and in vivo. This work describes the identification, formation, and occurrence in foods of the βC with a furan moiety flazin (1-[5-(hydroxymethyl)furan-2-yl]-9-pyrido[3,4-]indole-3-carboxylic acid). Flazin was formed by the reaction of l-tryptophan with 3-deoxyglucosone but not with 5-hydroxymethylfurfural.
View Article and Find Full Text PDFMetabolites
November 2023
Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 25-2 Petrovka Str., 107031 Moscow, Russia.
The profile of and dynamic concentration changes in tyrosine, phenylalanine, and tryptophan metabolites in blood are of great interest since they could be considered potential biomarkers of different disorders. Some aromatic metabolites, such as 4-hydroxyphenyllactic, 4-hydroxyphenylacetic, phenyllactic, and 4-hydroxybenzoic acids have previously demonstrated their diagnostic significance in critically ill patients and patients with post-COVID-19 syndrome. In this study, a sensitive method, including serum protein precipitation with methanol and ultra-high-pressure liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) detection, was developed and validated for six phenyl- and five indole-containing acids in human serum.
View Article and Find Full Text PDFJ Dairy Sci
April 2024
Division of Animal and Nutritional Science, West Virginia University, Morgantown, WV 26506. Electronic address:
We examined the effects of 2 multispecies direct-fed microbial (DFM) supplements on ruminal and plasma metabolome of early-lactation dairy cows using a high-coverage untargeted metabolomics approach. A total of 45 multiparous Holstein cows (41 ± 7 DIM) were enrolled for the 14-d pre-experimental and 91-d experimental period and were a subset from a lactation performance study, which used 114 cows. Cows were blocked using pre-experimental energy-corrected milk yield and randomly assigned within each block to 1 of 3 treatments: (1) corn silage-based diet with no DFM supplement (control; CON), (2) basal diet top-dressed with a mixture of Lactobacillus animalis and Propionibacterium freudenreichii at 3 × 10 cfu/d (PRO-A), or (3) basal diet top-dressed with a mixture of L.
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