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Title: Design, Synthesis, and Protein Crystallography of Biaryltriazoles as Potent Tautomerase Inhibitors of Macrophage Migration Inhibitory Factor

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/ja512112j· OSTI ID:1172998

Optimization is reported for biaryltriazoles as inhibitors of the tautomerase activity of human macrophage migration inhibitory factor (MIF), a proinflammatory cytokine associated with numerous inflammatory diseases and cancer. A combined approach was taken featuring organic synthesis, enzymatic assaying, crystallography, and modeling including free-energy perturbation (FEP) calculations. X-ray crystal structures for 3a and 3b bound to MIF are reported and provided a basis for the modeling efforts. The accommodation of the inhibitors in the binding site is striking with multiple hydrogen bonds and aryl–aryl interactions. Additional modeling encouraged pursuit of 5-phenoxyquinolinyl analogues, which led to the very potent compound 3s. Activity was further enhanced by addition of a fluorine atom adjacent to the phenolic hydroxyl group as in 3w, 3z, 3aa, and 3bb to strengthen a key hydrogen bond. We also show that physical properties of the compounds can be modulated by variation of solvent-exposed substituents. Several of the compounds are likely the most potent known MIF tautomerase inhibitors; the most active ones are more than 1000-fold more active than the well-studied (R)-ISO-1 and more than 200-fold more active than the chromen-4-one Orita-13.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1172998
Journal Information:
Journal of the American Chemical Society, Vol. 137, Issue 8; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 55 works
Citation information provided by
Web of Science

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Cited By (14)

Selective remote esterification of 8-aminoquinoline amides via copper( ii )-catalyzed C(sp 2 )–O cross-coupling reaction journal January 2017
Regioselective remote C5 cyanoalkoxylation and cyanoalkylation of 8-aminoquinolines with azobisisobutyronitrile journal January 2020
Increased binding of thiophene-based ligands to mercury( ii ) with water solubilizing functional groups journal January 2020
Ligand binding free energy and kinetics calculation in 2020 journal January 2020
Obacunone causes sustained expression of MKP-1 thus inactivating p38 MAPK to suppress pro-inflammatory mediators through intracellular MIF journal August 2017
A toll-like receptor agonist mimicking microbial signal to generate tumor-suppressive macrophages journal May 2019
The solvent-controlled chemoselective construction of C–S/S–S bonds via the Michael reaction/thiol coupling of quinoline-2-thiones journal January 2019
Optimization of Pyrazoles as Phenol Surrogates to Yield Potent Inhibitors of Macrophage Migration Inhibitory Factor journal April 2018
Triazole Biheterocycles from Cinchona Alkaloids: Coordination and Antiproliferative Properties journal August 2018
Sulfinates and thiocyanates triggered 6- endo cyclization of o -alkynylisocyanobenzenes journal January 2018
Cu-catalyzed Cascade Cyclization of Isothiocyanates, Alkynes, and Diaryliodonium Salts: Access to Diversely Functionalized Quinolines journal August 2017
Accuracy, precision, and efficiency of nonequilibrium alchemical methods for computing free energies of solvation. I. Bidirectional approaches journal October 2019
Metal Ion Modeling Using Classical Mechanics journal January 2017
A Fluorescence Polarization Assay for Binding to Macrophage Migration Inhibitory Factor and Crystal Structures for Complexes of Two Potent Inhibitors journal June 2016

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