[EN] MODULAR CHEMICAL PROBE FOR DETECTION OF AMINO ACID CITRULLINE IN PHYSIOLOGICAL SAMPLES<br/>[FR] SONDE CHIMIQUE MODULAIRE POUR LA DÉTECTION DE CITRULLINE D'ACIDE AMINÉ DANS DES ÉCHANTILLONS PHYSIOLOGIQUES
申请人:WISYS TECH FOUNDATION INC
公开号:WO2021016339A1
公开(公告)日:2021-01-28
An improved chemical probe for the detection of the amino acid citrulline combines: 1) a reactive head formed of 1,3-dicarbonyl moiety that reacts with a citrulline side chain in an improved manner compared to currently used 1,2-dicarbonyl moieties; and 2) a modular action of the probe where citrulline side chains are labeled first using reactive heads described above, and attachment of a read-out subunit or tag, be it a fluorophore, a nanoparticle, or an antigen is performed separately. The modular nature of the chemical probe increases the sensitivity of the probes due to their smaller size. Additionally, the chemical probes of the present disclosure allow the same sample to be analyzed using a variety of read-out methods.
A simple and efficient FeCl3-catalyzed direct alkylation of active methylene compounds with benzylic and allylic alcohols under mild conditions
作者:Umasish Jana、Srijit Biswas、Sukhendu Maiti
DOI:10.1016/j.tetlet.2007.04.017
日期:2007.6
A highlyefficient FeCl3-catalyzed alkylation of various active methylene compounds with various benzylic or allylic alcohols under mild conditions has been developed. The reaction was carried out in the presence of a catalytic amount of anhydrous FeCl3 (10 mol %) under reflux in methylene chloride. High to excellent yields were obtained.
Lead Optimization of a Pyrrole-Based Dihydroorotate Dehydrogenase Inhibitor Series for the Treatment of Malaria
作者:Sreekanth Kokkonda、Xiaoyi Deng、Karen L. White、Farah El Mazouni、John White、David M. Shackleford、Kasiram Katneni、Francis C. K. Chiu、Helena Barker、Jenna McLaren、Elly Crighton、Gong Chen、Inigo Angulo-Barturen、Maria Belen Jimenez-Diaz、Santiago Ferrer、Leticia Huertas-Valentin、Maria Santos Martinez-Martinez、Maria Jose Lafuente-Monasterio、Rajesh Chittimalla、Shatrughan P. Shahi、Sergio Wittlin、David Waterson、Jeremy N. Burrows、Dave Matthews、Diana Tomchick、Pradipsinh K. Rathod、Michael J. Palmer、Susan A. Charman、Margaret A. Phillips
DOI:10.1021/acs.jmedchem.0c00311
日期:2020.5.14
Compounds with nanomolar potency versus Plasmodium DHODH and Plasmodium parasites were identified with good pharmacological properties. X-ray studies showed that the pyrroles bind an alternative enzyme conformation from 1 leading to improved species selectivity versus mammalianenzymes and equivalent activity on Plasmodium falciparum and Plasmodium vivax DHODH. The best lead DSM502 (37) showed in vivo efficacy
Reaction of active methylene compounds with aromatic aldehydes in the presence of chlorotrimethylsilane–sodium iodide–acetonitrile reagent gave C-arylmethylated products, the reduced condensation products, although the reaction either with aliphatic primary aldehydes or with isobutyraldehyde afforded alkylidenation products or dihydrofurans.
The Efficiency of the Metal Catalysts in the Nucleophilic Substitution of Alcohols is Dependent on the Nucleophile and Not on the Electrophile
作者:Srijit Biswas、Joseph S. M. Samec
DOI:10.1002/asia.201201178
日期:2013.5
efficiency and selectivity to perform the desired substitution. Interestingly, the selectivity of the alcohols to produce the desired substitution products was found to be independent of the electrophilicity of the generated carbocations but highly dependent on the ease of formation of the cation. Catalysts based on iron(III), bismuth(III), and gold(III) show higher conversions for S‐, C‐, and N‐centered