Thod. All quantum chemical calculations had been performed with Gaussian09 program package (Frisch et al., 2016). Physicochemical properties, lipophilicity, water solubility, pharmacokinetics, druglikeness and medicinal chemistry parameters had been determined applying the cost-free SwissADME tools readily available at website from the Swiss Institute of Bioinformatics (http://www.swissadme.ch/) (Daina et al., 2017). The structures were constructed and converted into SMILES format. Attainable ideas for targets for compounds had been identified employing SEA (Keiser et al., 2007), which can relate proteins by a similarity ensemble method (initials, SEA) based on the chemical similarities of ligands. Crystal structures had been obtained in the Protein Data Bank (Berman et al., 2000). The proteins corresponded to KCNN1 small conductance calciumactivated potassium channel protein 1 (5wbx, ligand HET-ID AJY; (3Z)-6-bromo-3-(hydroxyimino)-5-methyl-1,3-dihydro2H-indol-2-one) and MAO-B (4crt, ligand HET-ID ASS234; (E)-N-methyl-N-[[1-methyl-5-[3-[1-(phenylmethyl)piperidin4-yl]propoxy]indol-2-yl]methyl]prop-1-en-1-amine), implicated in neurodegenerative illnesses; too as eukaryotic initiation element 4E (1ipb, ligand HET-ID GTA; P1-7-methylguanosine-P3adenosine-5 ,5 -triphosphate) and five -nucleotidase (4h2b, ligand HET-ID 0XE; 5,6-dihydroxy-4-oxo-2-phenyl-4H-chromen7-yl beta-D-glucopyranosiduronic acid; Baicalin), implicated in cancer. All protein structures were determined at highresolution. Hydrogen atoms have been added with Maestro computer software (Maestro, 2017). Docking was then performed by AutodockVina (Trott and Olson, 2010) making use of a box size of 25 in every single dimension; nine modes; power (+)-HA-966 Description selection of 1 kcal/mol; 1 cpu per run; exhaustiveness = 16; and one hundred runs per ligand and per protein. In every single case, the co-crystallized ligand was taken as a optimistic manage, and also the binding score recorded for it was used as threshold to establish binders.Results AND DISCUSSION Synthesis and CharacterizationTwelve benzylidene-based (1,3-selenazol-2-yl)hydrazones were ready via Hantzsch sort condensation of corresponding selenosemicarbazones with a series of 4-substituted bromoacetophenones (Figure 1). Compounds 4-OMe and 4-Me crystallized as single crystals suitable for X-ray structural evaluation, which indicated E-configuration on the imine bond (vide infra). Synthesis on the compounds 1 and 1-Me was previously published, but without having spectral characterization (Bulka et al., 1961). Literature information for melting points of 1 and 1Me drastically differ from our data (Bulka et al., 1961). Composition on the compounds was confirmed by elemental analysis, whilst NMR and IR spectroscopy were employed for structure elucidation. 1D and 2D NMR spectra are offered in Supplementary Figures S2 41. The influence of substituents on each 1022150-57-7 Purity & Documentation phenyl rings, A and B, on NMR chemical shifts of corresponding hydrogen and carbon atoms was observed. As expected, inFIGURE 2 | ORTEP drawings from the molecular structures of 4-Me (A) and 4-OMe (B) with non-H atoms labeling. Displacement ellipsoids are shown in the 50 probability level and H atoms are drawn as spheres of arbitrary radii. Crystal packing diagrams of 4-Me (C) and 4-OMe (D).Frontiers in Chemistry | www.frontiersin.orgJuly 2018 | Volume 6 | ArticleElshaflu et al.Selenazolyl-hydrazones as MAO Inhibitorsthe 1 H NMR spectra of all compounds the signal of H two will be the most downfielded. Substitution on the phenyl rings had negligible influence on chemical shift of a proton from 1,3sele.