Computed Properties of C5H5FN2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5-Amino-2-fluoropyridine, is researched, Molecular C5H5FN2, CAS is 1827-27-6, about Design, synthesis and biological evaluation of indole-2-carboxylic acid derivatives as IDO1/TDO dual inhibitors. Author is Cui, Guonan; Lai, Fangfang; Wang, Xiaoyu; Chen, Xiaoguang; Xu, Bailing.
Indoleamine 2,3-dioxygenase 1 (IDO1) and tryptophan 2,3-dioxygenase (TDO) are involved in the key steps of tryptophan metabolism and are potential new targets for tumor immunotherapy. In this work, a variety of indole-2-carboxylic acid derivatives I (R1 = H, 7-F, NHAc, etc.; X = NH, NMe, S; Y = NH, S, -NHCH2-, etc.; Ar = 4-F-3-Cl-C6H3, 4-F-3-OMe-C6H3, 3-Cl-3-OMe-C6H3, etc.) were synthesized, and their inhibitory activities against both enzymes along with structure-activity relationships were investigated. As a result, a number of 6-acetamido-indole-2-carboxylic acid derivatives were found to be potent dual inhibitors with IC50 values at low micromolar levels. Among them, compound I (R1 = 6-NHAc, X = N, Y = NH, Ar = 3,4-di-F-C6H3) was the most potent inhibitor with an IC50 value of 1.17μM for IDO1, and 1.55μM for TDO, resp. In addition, a para-benzoquinone derivative II, resulted from the oxidation of compound I (R1 = 6-NHEt, X = NH, Y = NH, Ar = 4-F-3-Cl-C6H3), was also identified and it showed strong inhibition against the two enzymes with IC50 values at the double digit nanomolar level. Using mol. docking and mol. dynamic simulations, authors predicted the binding modes of this class of compounds within IDO1 and TDO binding pocket. The results provide insights for further structural optimization of this series of IDO1/TDO dual inhibitors.
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