Synthesis, anti-thymidine phosphorylase activity and molecular docking of 5-thioxo-[1,2,4]triazolo[1,5-a][1,3,5]triazin-7-ones
摘要:
In our lead finding program, a series of 5-thioxo-[1,2,4] triazolo[1,5-a][1,3,5]triazin-7-ones and their 5-thio- alkyl derivatives were designed and synthesized which contained different substituents at ortho-position of 2-phenyl ring attached to the fused ring structure. The preliminary pharmacological evaluation demonstrated that the synthesized compounds exhibited a varying degree of inhibitory activity towards thymidine phosphorylase (TP), comparable to reference compound, 7-Deazaxanthine (7-DX, 2) (IC50 value = 42.63 mu M). The study also inferred that the ortho-substituted group at the phenyl ring and 5-thio-alkyl moiety imparted steric hindrance effects in the binding site of the enzyme, leading to a reduced inhibitory response. In addition, compound 3a was identified as a mixed-type inhibitor of TP. Moreover, computational docking study was performed to illustrate the important structural information on the plausible ligand-enzyme binding interactions. (C) 2013 Elsevier Inc. All rights reserved.
Synthesis, in vitro evaluation of thymidine phosphorylase inhibitory activity, and in silico study of 1,3,5-triazin-2,4-dione and its fused analogues
作者:Hriday Bera、Wai-Keung Chui、Sayan Dutta Gupta、Anton V. Dolzhenko、Lingyi Sun
DOI:10.1007/s00044-013-0589-1
日期:2013.12
5-triazin-2,4-dione and their fused analogues was designed, synthesized and their in vitro thymidine phosphorylase inhibitory potential was evaluated. The monocyclic analogues were found to be inactive. Among the different fused derivatives synthesized, compounds having keto group (C=O) at C7/C4 and thioketo group (C=S) at C5/C2 position showed TP inhibitoryactivity comparable to positive control, 7-deazaxanthine