Investigation of The Crystal and Molecular Structure Of ‘‘5-(2-Chloro-6- Fluorobenzylthio)-1,3,4-Thiadiazol-2-Amine’’ Single Crystal Containing ThiadiazolRingby Experimental and Theoretical Methods

In this work, a single crystal of 5-(2-chloro-6-fluorobenzylthio)-1,3,4-thiadiazol-2-aminecontaining thiadiazole ring was synthesized. The structure of the synthesized crystal was confirmed by 1H-NMR, 13C-NMR and X-ray analysis techniques. Theoretical calculations have been made in order to support experimental results. In this, the geometric parameters of the compound were optimized by the density functional theory(DFT) B3LYP/6-31G(d) method using the gaussian 09 packet program and structural parameters (bond angles, bond lengths and dihedral angles), 1H- and 13C-NMR spectra and frontier molecular orbitals (HOMO-LUMO) of the single crystal have been calculatedtheoretically. Finally, the molecular doking simulation was carried out to inhibit the 2WQY receptor target structure for inhibitor activity study of the synthesized single crystal.Bu çalışmada, tiyadiazol halka içeren5-(2-kloro-6-florobenziltiyo)-1,3,4-tiyadiazol-2-amin tek kristali sentezlenmiştir. Sentezlenen kristalin yapısı, 1H-NMR, 13C-NMR ve X-ışını analiz teknikleri ile aydınlatılmıştır. Deneysel sonuçlara destek olması amacıyla da teorik hesaplamalar yapılmıştır. Bunun içinde bileşiğin geometrik parametreleri gaussian 09paket programı kullanılarak, yoğunluk fonksiyonel teorisi (DFT) B3LYP/6-31G(d) metodu ile optimize edildi ve yapısal parametreleri (bağ açıları, bağ uzunlukları ve dihedral açıları), 1H- ve 13C-NMR spektrumları vesınır moleküler orbitalleri (HOMO-LUMO) teorik olarak hesaplanmıştır. Son olarak, sentezlenen tek kristalin inhibitör aktivite çalışması için, 2WQY reseptör hedef yapısını inhibe etmek amacıyla moleküler doking simülasyonu yapılmıştır

Theoretical Calculations in Gas and Solid Phase on The Tautomeric Structure of 3-[(E)-2-(4-phenyl-1,3-thiazol-2-yl)hydrazin-1-ylidene]-indolin-2-one

Tiyazol halkası içeren 3-[(E)-2-(4-fenil-1,3-tiyazol-2-yl)hidrazin-1-yiliden]-indolin-2-on bileşiğinin iki tautomer formu üzerinde gaz ve katı fazında hesaplamalar yapılmıştır. İki tautomer yapı için gaz fazında Gaussian 09 programı ile DFT/B3LYP/6-31G(d) metodu, katı fazında ise Quantum-Espresso paket programı ile periyodik sınır şartları (PBC) kullanılarak molekülün geometriksel parametreleri ve frontier moleküler orbital enerjileri (FMO) incelenmiştir. Ayrıca tautomer yapılar, IRC (Intrinsic Reaction Coordinate) analiz yöntemi ile de karşılaştırılmıştır. Teorik tüm çalışmalar iki tautomer yapı üzerinde yapılmış olup bileşiğin hem gaz hem de katı fazında hesaplanan kararlı yapılarının x-ışınları yöntemiyle elde edilen yapıyla uyumlu olduğu görülmüştür.compound 3-[(E)-2-(4-phenyl-1,3-thiazol-2-yl)hydrazin-1-ylidene]-indolin-2-one in gas and solid phase under the periodic boundary conditions. For the two tautomer forms, some geometric parameters of the molecule and the molecular orbital energies of the frontier (FMO) have been investigated using Gaussian 09 program with the DFT/B3LYP/6-31G(d) method in the gas phase and with QuantumEspresso package program using periodic boundary conditions (PBC) in the solid. In addition, the tautomer structures were compared by IRC (Intrinsic Reaction Coordinate) analysis method. All In this study, theoretical calculations were made on two tautomer forms of the thiazole containing theoretical studies were performed for two tautomeric structures. As a consequence, all calculations show that stable structure of the title compound is compatible with the structure obtained by X-raysin both gas and solid phase

Syntheses, spectral characterization, single crystal X-ray diffraction and computational in gas and solid phases studies on chloro- acetic acid N ' -(2-hydroxy-naphthalen- 1-ylmethylene)- N-[4-(3-methyl-3-phenyl-cyclobutyl)-thiazol-2-yl]-hydrazide

In this study, the molecular structure of single crystal containing Schiff bases has been characterized by X-ray diffraction, NMR, IR and UV-Vis spectral techniques and compared with similar molecules in the literature. For the purpose of supporting X-ray results, geometric parameters and spectroscopic studies of the title compound were theoretically performed by Hartree-Fock and density functional theory methods. In addition, the title compound's molecular energies, Mulliken-ESP-NPA-Hirshfeld charges, molecular electrostatic potential surface, Frontier orbitals and thermodynamic properties to elucidate intermolecular interactions were calculated. All the calculations in gas and solid phases were carried out using Gaussian 09 and Quantum Espresso programs. It was found that the studies of X-ray are more compatible with the calculations made in the solid phase

Structure of 2-(2-(anthracen-9-ylmethylene)hydrazinyl)-4-(3-methyl-3-phenylcyclobutyl)thiazole by combined X-Ray crystallographic and molecular modelling studies

A single crystal of 2-(2-(anthracen-9-ylmethylene)hydrazinyl)-4-(3-methyl-3-phenylcyclobutyl)thiazole (C29H25N3S) containing anthracene, thiazole and cyclobutane rings has been synthesised. The synthesised crystal structure was characterised using IR, 1H-NMR and 13C-NMR spectroscopic and X-Ray analysis techniques. In the crystal, neighbouring molecules formed chains along [110] by interconnecting with N–H···N hydrogen bonding and π–π interactions. The geometrical parameters of the title compound were optimised by Gaussian 09 software in the gas phase and Quantum-Espresso software under Periodic Boundary Conditions (PBC) in the solid phase. Theoretically, IR, NMR spectra, Mulliken, NPA and AIM atomic charges, Hirshfeld surface and frontier molecular orbitals (FMOs) of the title compound were examined. Using the Hirshfeld surface and two-dimensional (2D) fingerprint graphics, the presence of intermolecular interactions in the crystal packing were analysed. The energies of these interactions and their distribution on the crystal structure were shown graphically. In general, it was seen that theoretical calculations were consistent with X-Ray results. © 2020 Informa UK Limited, trading as Taylor & Francis Group

Tek Kristal Bileşiğin Teorik ve Deneysel Yöntemlerle İncelenmesi

Bu çalışmada, Schiff bazı içeren C23H25N3OS bileşiği deneysel ve teorik yöntemler ile incelenmiştir. Bileşiğin bazı geometrik parametreleri katı fazında yoğunluk fonksiyonel teorisi (DFT) metodu kullanılarak, peryodik sınır şartları (PBC) altında Quantum-Espresso programı ile hesaplanmıştır. Moleküller arası hidrojen bağı etkileşimlerin belirlenmesi amacıyla da bileşiklerin, moleküler elektrostatik potansiyelleri (MEP) gaussian 09 programı ile DFT/B3LYP/6-31G(d) baz seti kullanılarak elde edilmiştir. Son olarak da, Hirshfeld yüzey analizi ile katı fazında moleküller arası etkileşimler incelenmiştir

A NovelClassSubstitutedImidazo[2,1-b][1,3,4]thiadiazoleDerivatives:Synthesis,Characterization,In VitroBiologicalActivity,andPotentialInhibitorsDesignStudies

In this study, imidazo[2,1-b][1,3,4]thiadiazole derivatives were designed and synthesized. All of the synthesized compounds were characterized by H-1 and C-13 nuclear magnetic resonance (H-1 NMR and C-13 NMR), fourier-transform infrared spectroscopy (FT-IR), elemental analysis, mass spectrometry, and X-ray diffraction. The synthesized compounds were tested for antileishmanial activity against two Leishmania species and antibacterial activity against nine bacterial species in the study. It was observed that 2-(4-Fluorobenzylthio)-6-(4-fluorophenyl)imidazo[2,1-b][1,3,4]thiadiazole (5) had the highest antileishmanial activity (MIC: 625 mu g/mL). Also, 4-(2-(4-fluorobenzylthio)imidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzonitrile (10), 2-(4-fluorobenzylthio)-6-(4-phenylphenyl)imidazo[2,1-b][1,3,4]thiadiazole (11), and 4-(2-(4-methoxybenzyl)imidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzonitrile (25) were found to be effective at different studied concentrations. PyRx software, which uses a Lamarckian genetics algorithm, was utilized to find the affinity values of all compounds in molecular docking simulations. Pharmacokinetic properties and toxicities of the ligands were then researched using PROTOX (a webserver for the prediction of oral toxicities of small molecules) and FAF-Drugs (free adsorption distribution, metabolism, excretion (ADME) tox filtering tool). The study showed that the ligands had acceptable toxicity and ADME properties for the inhibition of the 3JUS receptor

Synthesis, Characterization, Antimicrobial Evaluation, and Computational Investigation of Substituted Imidazo[2,1-b][1,3,4]Thiadiazole Derivatives

In this study, a novel series of 2,6-disubstituted and 2,5,6-trisubstituted imidazo[2,1-b][1,3,4]thiadiazole derivatives were synthesized starting from 2-amino-1,3,4-thiadiazole derivatives. Structures of the synthesized compounds were characterized using various analysis techniques. Then, in vitro biological activity tests were carried out for all synthesized compounds and they were found to show moderate to good activity against all bacteria and fungi tested. Next, molecular docking simulations were performed to observe the inhibition effect of the synthesized compounds on the 3R9C receptor and support their biological activity results. Finally, the pharmacokinetic, ADME and toxicity properties of all compounds were examined using FAF-Drugs and ProTox webservers and it was concluded that they had acceptable toxicity and ADME properties. © 2020 Wiley-VCH Gmb

Makrosiklik Bileşiğin Sentezi ve Spektroskopik Özellikleri

1,4,7-tritosyl-1,4,7,10-tetraazacyclododecane yeni bir makrosiklik yapıda olan bileşik sentezlenmiştir. Sentezlenen bileşiğin yapısı IR, NMR spektroskopik yöntemler kullanılarak aydınlatılmıştır. Deneysel çalışmalara destek olması amacı ile de B3LYP metodu ve 6-31G(d) temel seti kullanılarak IR, NMR spektrumları ve bazı yapısal parametreler hesaplanmıştır. Moleküller arası etkileşimlerin daha iyi anlaşılabilmesi amacıyla da bileşiğin, HOMO-LUMO frontier orbitalleri ve moleküler elektrostatik potansiyeli (MEP) gaussian 09 programı ile elde edilmiştir

Experimental and theoretical studies on tautomeric structures of a newly synthesized 2,2'(hydrazine-1,2-diylidenebis(propan-1-yl-1-ylidene)) diphenol

WOS: 000424631900022In the present study, a single crystal of a Schiff base, 2,2'(hydrazine-1,2-diylidenebis(propan-1-yl-1-ylidene)) diphenol, was synthesized. The structure of the synthesized crystal was confirmed by H-1 and C-13 NMR spectroscopic and X-ray diffraction analysis techniques. Experimental and theoretical studies were carried out on two tautomeric structures. It has been observed that the title compound studied can be in two different tautomeric forms, phenol-imine and keto-amine. Theoretical calculations have been performed to support experimental results. Accordingly, the geometric parameters of the compound were optimized by the density functional theory (DFT) method using the Gaussian 09 and Quantum Espresso (QE) packet program was used for periodic boundary conditions (PBC) studies. Furthermore, the compound was also tested for in vitro antifungal activity against Sclerotinia sclerotiorum, Alternaria solani, Fusarium oxysporum f. sp. lycopersici and Monilinia fructigena plant pathogens. Promising inhibition profiles were observed especially towards A. solani. Finally, molecular docking studies and post-docking procedure based on Molecular Mechanics-Generalized Born Surface Area (MM-GBSA) were also carried out to get insight into the compound's binding interactions with the potential. Although theoretical calculations showed that the phenol-imine form was more stable, keto-amine form was predicted to have better binding affinity which was concluded to result from loss of rotational entropy in phenol-imine upon binding. The results obtained here from both experimental and computational methods might serve as a potential lead in the development of novel anti-fungal agents. (C) 2018 Elsevier B.V. All rights reserved.Research Centre of Ahi Evran University [PYO-MUH.4001.15.004]This study was supported financially by the Research Centre of Ahi Evran University (PYO-MUH.4001.15.004). In addition, the numerical calculations reported in this paper were partially performed at TUBITAK ULAKBIM, High Performance and Grid Computing Center (TRUBA resources)

Inflammatory Markers in Patients Using Domiciliary Non-invasive Mechanical Ventilation: C Reactive Protein, Procalcitonin, Neutrophil Lymphocyte Ratio

Aim: Early identification and treatment of infections in patients using domiciliary non-invasive mechanical ventilation (NIMV) due to chronic respiratory failure (CRF) can reduce hospital admissions. We assessed C-reactive protein (CRP), procalcitonin, and neutrophil lymphocyte ratio (NLR) as indicators of infection/inflammation.Methods: The study was designed as a retrospective, observational, cross-sectional study, and was performed in 2016 in an intensive care unit outpatient clinic in patients using NIMV. Patients who came to the outpatient clinic with dyspnea, increased sputum, increased prothrombin, and who had hemogram, procalcitonin, and serum CRP, NLR, and PLT/MPV levels assessed, were enrolled into the study. Demographic characteristics, co-morbid diseases, respiratory symptoms, hemogram, biochemistry, CRP, and procalcitonin values in stable and acute attack patients were recorded from patient files. The descriptive statistics and CRP, NLR, and procalcitonin values were assessed.Results: During the study period, 49 patients (24 female) with chronic obstructive pulmonary disease (COPD, n = 24), obesity hypoventilation syndrome (OHS, n = 15), or interstitial lung disease, n = 10), and having had three inflammatory markers assessed, were included in the study. Their mean age was 67 (SD ± 12). Stable patients vs. those who had an acute attack was 41 vs. eight, and within 7 days of outpatient admission four patients were hospitalized. CRP, NLR, and PLT/MPV values were similar in patients' who had sputum purulence, and an increase in dyspnea and sputum, but procalcitonin was significantly higher in patients who had an acute attack. Procalcitonin was not correlated with CRP, NLR, and PLT/MPV.Conclusions: Patients with CRF had similar levels of CRP and NLR during a stable and acute attack state. Procalcitonin may be a better marker for therapeutic decisions in advanced chronic inflammatory diseases