- Glycosylated lanthanide cyclen complexes as luminescent probes for monitoring glycosidase enzyme activity
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The development of synthetic chemical probes for the detection of enzymes is extremely important for biological, medicinal, and industrial applications. Here we report the synthesis of an array of novel glycosylated Tb(iii) complexes, their photophysical properties in solution, and their ability to function as luminescent probes for observing glycosidase enzyme activity in real time. Our initial studies into the application of these complexes for the detection of the Concanavalin A (ConA) lectin is also reported, highlighting the broad scope of these novel chemical probes.
- Burke, Helen M.,Gunnlaugsson, Thorfinnur,Scanlan, Eoin M.
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p. 9133 - 9145
(2016/10/07)
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- Access to newly functionalized imidazole derivatives: Efficient synthesis of novel 5-amino-2-thioimidazoles using propylphosphonic anhydride (T3P)
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We describe here an efficient method to synthesize 5-amino-2-thioimidazole compounds by T3P-mediated cyclization of N-acetamidoisothiourea intermediates. The newly functionalized 5-amino-2-thioimidazole compounds are finally obtained in 5 steps from an amine as starting block.
- Lasalle, Manuel,Picon, Sylvain,Boulahjar, Rajaa,Hoguet, Vanessa,Van Obbergen, Jolien,Roussel, Pascal,Deprez, Benoit,Charton, Julie
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supporting information
p. 1011 - 1014
(2015/02/19)
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- Photoinduced and N-bromosuccinimide-mediated cyclization of 2-azido-N-phenylacetamides
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An efficient synthesis of quinoxalin-2(1H)-ones or spiro[cyclohexene-1, 2′-imidazol]-4′-ones has been achieved in moderate to high yields by the visible light-induced and N-bromosuccinimide-mediated cyclization reaction of 2-azido-N-phenylacetamides at ambient temperature. Both the regioselectivity and the speed of cyclization are affected by the substituents attached to the phenyl ring. For example, quinoxalin-2-ones are produced as the main products when the substrates bear electron-withdrawing groups at the para-position of the phenyl ring; in contrast, spiro[cyclohexene-1,2′-imidazol]-4′-ones are obtained as the main products when the substrates bear electron-donating groups at the para-position.
- Li, Zhan-Shan,Wang, Wei-Xia,Yang, Ji-Dong,Wu, Yue-Wei,Zhang, Wei
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supporting information
p. 3820 - 3823
(2013/09/02)
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- Discovery of novel N -phenylphenoxyacetamide derivatives as EthR inhibitors and ethionamide boosters by combining high-throughput screening and synthesis
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In this paper, we describe the screening of a 14640-compound library using a novel whole mycobacteria phenotypic assay to discover inhibitors of EthR, a transcriptional repressor implicated in the innate resistance of Mycobacterium tuberculosis to the second-line antituberculosis drug ethionamide. From this screening a new chemical family of EthR inhibitors bearing an N-phenylphenoxyacetamide motif was identified. The X-ray structure of the most potent compound crystallized with EthR inspired the synthesis of a 960-member focused library. These compounds were tested in vitro using a rapid thermal shift assay on EthR to accelerate the optimization. The best compounds were synthesized on a larger scale and confirmed as potent ethionamide boosters on M. tuberculosis-infected macrophages. Finally, the cocrystallization of the best optimized analogue with EthR revealed an unexpected reorientation of the ligand in the binding pocket.
- Flipo, Marion,Willand, Nicolas,Lecat-Guillet, Nathalie,Hounsou, Candide,Desroses, Matthieu,Leroux, Florence,Lens, Zoé,Villeret, Vincent,Wohlk?nig, Alexandre,Wintjens, René,Christophe, Thierry,Kyoung Jeon, Hee,Locht, Camille,Brodin, Priscille,Baulard, Alain R,Déprez, Benoit
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supporting information; experimental part
p. 6391 - 6402
(2012/10/07)
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- Cycloadditions, 7. Intramolecular Diels-Alder Reactions of Allenecarboxanilides; Variation of the Substituents in the p-Position of the Aniline Nucleus
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The N-methyl-1,2-propadiene-1-carboxanilides 6a-h, differently substituted in the p-position, are synthesized by Wittig reaction of the carbamoylmethylenephosphoranes 5 with ketene.They isomerize by thermolysis in boiling xylene to give the tricycles 7a-h, the products of the intramolecular Diels-Alder reaction, and in some cases also to the quinolones 9, the products of a cyclization reaction.The order of the reaction and the influence of the substituents upon the rate of the intramolecular Diels -Alder reaction are determined by 1H-NMR spectroscopy.
- Diehl, Klaus,Himbert, Gerhard,Henn, Lothar
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p. 2430 - 2443
(2007/10/02)
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