1,3-Oxazol-4-ylphosphonium salts as new non-peptide inhibitors of furin

• Main Authors: T. V. Osadchuk, V. K. Kibirev1,2, O. V. Shybyryn, A. V. Semyroz, Ye. S. Velihina, Е. R. Abdurakhmanova, V. S. Brovarets
• Format: Article
• Language: English
• Published: National Academy of Sciences of Ukraine and Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine. 2019-08-01
• Series: Ukrainian Biochemical Journal
• Subjects: furin; inhibitors; mechanism of inhibition; oxazole derivatives; triphenylphosphonium salts
• Online Access: http://ukrbiochemjournal.org/wp-content/uploads/2019/06/Osadchuk_4_19.pdf

A series of novel triphenylphosphonium derivatives of 1,3-oxazole containing at C2 and C5-positions electron withdrawing or electron-donating groups were synthesized and characterized by 1H, 31P NMR and IR spectroscopy, element analysis and chromato-mass spectrometry. These compounds were found to be a new class of non-peptide inhibitors of furin. Depending on the chemical structure, they inactivated enzyme at micromolar level by mechanism of competitive, non-competitive or mixed inhibition. Evaluation of the synthesized derivatives as furin inhibitors showed that among the triphenylphosphonium salts studied by us, oxazole 12 containing 2,4-dichlorophenyl- in the C2-position and MeS-group at C5 is the most active (Ki = 1.57 μM) competitive inhibitor of furin. Our results provided evidence that chemical modification of 1,3-oxazole-4-yl-triphenylphosphonium salts may be useful for developing new more potent and selective inhibitors of furin.