93103-15-2Relevant articles and documents
Structural Basis for EGFR Mutant Inhibition by Trisubstituted Imidazole Inhibitors
Heppner, David E.,Günther, Marcel,Wittlinger, Florian,Laufer, Stefan A.,Eck, Michael J.
, p. 4293 - 4305 (2020/05/27)
Acquired drug resistance in epidermal growth factor receptor (EGFR) mutant non-small-cell lung cancer is a persistent challenge in cancer therapy. Previous studies of trisubstituted imidazole inhibitors led to the serendipitous discovery of inhibitors that target the drug resistant EGFR(L858R/T790M/C797S) mutant with nanomolar potencies in a reversible binding mechanism. To dissect the molecular basis for their activity, we determined the binding modes of several trisubstituted imidazole inhibitors in complex with the EGFR kinase domain with X-ray crystallography. These structures reveal that the imidazole core acts as an H-bond acceptor for the catalytic lysine (K745) in the "αC-helix out" inactive state. Selective N-methylation of the H-bond accepting nitrogen ablates inhibitor potency, confirming the role of the K745 H-bond in potent, noncovalent inhibition of the C797S variant. Insights from these studies offer new strategies for developing next generation inhibitors targeting EGFR in non-small-cell lung cancer.
Synthetic and Mechanistic Studies on the Preparation of Pyridyl-Substituted Imidazothiazoles
Lantos, Ivan,Gombatz, Kerry,McGuire, Michael,Pridgen, Lendon,Remich, James,Shilcrat, Susan
, p. 4223 - 4227 (2007/10/02)
A new method is presented for the introduction of the 4'-pyridyl substituent into 6-aryl-2,3-dihydroimidazothiazoles.The method involves treatment of the imidazothiazolines with the reactive complex of pyridine and ethyl chloroformate and oxidative deethyl carboxylation of the dihydropyridine adducts formed.Sulfur in refluxing mesitylene was found most suitable for the latter reaction, but chromium trioxide in pyridine or KtBuO and air were also effective.