Conventional Organic Solvents And Ionic Liquid Mediated Synthesis Of New Azomethine Compounds As Potent Cholinesterase Inhibitors

Lima siri terbitan baru azometan telah disintesis melalui kondensasi tindak balas antara benzaldehid tentukarganti dan terbitan amino masing-masig dalam etanol suatu pelarut organik konvensional dan pelarut ionik hijau, 1-butil-3-metilimidazolium bromida ([bmim]Br). Five new series of azomethine derivatives were synthesized by condensation of substituted benzaldehydes and amino derivatives in ethanol a conventional organic solvents and a green ionic solvent, 1-butyl-3-methylimidazolium bromide ([bmim]Br), respectively

Synthesizing, Studying Molecular Docking, Characterizing, and Preliminary Evaluating Anti-Bacterial Effects of Derivatives of Serotonin Contain Imidazolidine Ring

This study included synthesis of new serotonin derivatives in which imidazolidine rings are present in their structures. The final imidazolidine derivatives compounds were synthesized by reaction of synthesized   Schiff bases derivatives of serotonin with the glycine (NH2-CH2COOH) in presence of tetrahydrofuran (THF) as a solvent. The imidazolidine derivatives were identified by physical characteristics, FT-IR spectroscopy and 1H- NMR spectroscopy. Biological activities against two Gram negative (Klebsiella and E. coli) and two Gram positive (Streptococcus pyogenes and Staphylococcus aureus) bacteria were also distinguished. All the synthesized compounds III(a-d) exhibit moderate activities on four types of bacteria comparing with the activity of standard drug (Trimethoprim) but the highest activities of these compounds occur on Streptococcus pyogenes and their least activities occur on E. coli. The synthesized compounds were studied for the molecular docking to know the interaction and affinity of binding between them and bacteria

Molecular Drug Design, Synthesis and Antibacterial study of Novel 4-Oxothiazolidin-3-yl Derivatives

New compounds containing 4-thiazolidinone pharmacophore 5(a) and (5b) have been synthesized. The chemical structures of the intermediate and final compounds were characterized and confirmed by using FT-IR and 1H-NMR spectroscopy. All final compounds were tested against gram-positive and gram-negative bacteria using a well-diffusion technique for their ability as antimicrobial agents.  The tested compounds 5a and 5b showed variable and modest antibacterial activity against gram-negative bacteria and gram-positive bacteria. Molecular docking simulations were studied to understand the molecular core. The results were achieved by docking, the most active compounds into the active site of protein of the bacteria which completely accorded with in vitro results. 

Synthesis, Characterization and Antimicrobial Activityof 3-substituted Benzo[4,5]thiazolo[2,3-c][1,2,4]triazole

New series of tricyclic benzo[d]thiazole derivatives (2-12) incorporated into fused to different five membered nitrogen and sulphur containing heterocyclic were prepared from 2- hydrazinobenzo[d]thiazole (1) when treated with triethylformate, acetic anhydride, ethyl chloro acetate, carbon disulphide in alkali, and urea respectively. Compound(1) converted to Schiff’s bases by the condensation different aromatic aldehydes, the synthesized Schiff’s bases were cyclized by bromine in acetic acid to form triazole ring in the new derivatives (7-11) , which might result in biologically active agents. Similar new tricyclic compounds, triazolobenzothiazol-3-amine [12], was obtained from action of benzo[d]thiazole-2-thiol with thiosemicarbazide. The structures of the new compounds have been characterized by elemental analysis and spectral data. Newly synthesized compounds (2-12) were screened for their antibacterial activity against four bacterial species. They were found to exhibit good antibacterial activity

IMPACT OF COVID-19 ON MULTIPLE BODY ORGAN FAILURE: A REVIEW

COVID-19 is a highly contagious disease caused by Severe Acute Respiratory Syndrome CoronaVirus-2 (SARS-CoV-2); which is a novel single-stranded positive RNA infection which consist of cytokines that activate the pathogenic systems that cause high respiratory pain condition, and adversely affect on multiple body organ in humans as per their immunity standards to fight against the virus. SARS-CoV-2 enters the host cell through Angiotensin-Converting Enzyme 2 (ACE 2). ACE 2 is a sub-part of the Renin-Aldosterone Angiotensin System (RAAS), intelligently communicated in the body's kidney, heart, lungs, and malignant tissues. The malfunctioning of RAAS in the body leads to hypertension, cardiovascular sicknesses, endocrine system and negatively affects a brain-body communication channel. Treatments on the RAAS structure, 'thiazolidinedione's and smoking, toxemia, kidney, lungs disorder due to the SARS-CoV-2 attack on the host cell and notice the behavioral changes of body organs the arrival of cytokines that causes multi-organ damage. This paper involves the study of the effects of coronavirus disease on multiple body-organ injuries

Burnout among surgeons before and during the SARS-CoV-2 pandemic: an international survey

Background: SARS-CoV-2 pandemic has had many significant impacts within the surgical realm, and surgeons have been obligated to reconsider almost every aspect of daily clinical practice. Methods: This is a cross-sectional study reported in compliance with the CHERRIES guidelines and conducted through an online platform from June 14th to July 15th, 2020. The primary outcome was the burden of burnout during the pandemic indicated by the validated Shirom-Melamed Burnout Measure. Results: Nine hundred fifty-four surgeons completed the survey. The median length of practice was 10 years; 78.2% included were male with a median age of 37 years old, 39.5% were consultants, 68.9% were general surgeons, and 55.7% were affiliated with an academic institution. Overall, there was a significant increase in the mean burnout score during the pandemic; longer years of practice and older age were significantly associated with less burnout. There were significant reductions in the median number of outpatient visits, operated cases, on-call hours, emergency visits, and research work, so, 48.2% of respondents felt that the training resources were insufficient. The majority (81.3%) of respondents reported that their hospitals were included in the management of COVID-19, 66.5% felt their roles had been minimized; 41% were asked to assist in non-surgical medical practices, and 37.6% of respondents were included in COVID-19 management. Conclusions: There was a significant burnout among trainees. Almost all aspects of clinical and research activities were affected with a significant reduction in the volume of research, outpatient clinic visits, surgical procedures, on-call hours, and emergency cases hindering the training. Trial registration: The study was registered on clicaltrials.gov "NCT04433286" on 16/06/2020

IN-SILICO EVALUATION OF BINDING INTERACTION AND ADME PROPERTIES OF NOVEL 5-(THIOPHEN-2-YL)-1,3,4-OXADIAZOLE-2-AMINE DERIVATIVES AS ANTI-PROLIFERATIVE AGENTS

Objective: The objective of this research was the virtual design of nine novel 1,3,4-oxadiazole derivatives and evaluating their antiproliferative activity as potential cyclin-dependent kinase 2 (CDK-2) inhibitors, which is a major component in cell cycle and proliferation. Methods: CDK-2 structure, PDB ID, 2R3J, co-crystallized with ligand SCJ from protein data bank was chosen to be docked with a series of nine 5-(thiophen-2-yl)-1,3,4-oxadiazol-2-amine derivatives to evaluate their abilities as potential anti-proliferative agents using Glide software (Maestro 11.4) one of Schrodinger software (Schrodinger, 2018). In addition, the pharmacokinetic properties of these derivatives were evaluated using the Swiss-ADME web tool. Results: Molecular modeling proposed that these 1,3,4-oxadiazole derivatives have powerful binding interaction with the active binding site of CDK-2 protein. In this article, two molecules have been observed as the most effective as they have docking scores of (-10.654 and -10.169 kcal/mol) respectively, whereas the binding score of the reference ligand was (-9.919 Kcal/mol) and most of the derivatives have fulfilled the Swiss-ADME parameters as potential orally active compounds. Conclusion: Novel 1,3,4-oxadiazole derivatives had shown promising results to be considered as lead compounds for developing new anti-proliferative agents as two compounds (P-1 and P-5) exhibit better docking score at 2R3J active site than the reference ligand with further biological and pharmacological evaluation required

Synthesis, characterization and molecular docking study of novel N-substituted sulfadiazine derivatives as potential anti-mycobacterial agents

A new series N-substituted sulfadiazine derivatives attached with different heterocyclic rings such as 4-oxo-1, 4-dihydroquinazolin[7-12], 4-oxo-2H-benzo[1,3]thiazin[13-18] have been synthesized by condensation reactions. The structures of synthesized derivatives are characterized by FT-IR, 1H-NMR, 13C-NMR spectroscopic techniques, and some physicochemical properties. A molecular docking study is performed and the binding values show very good matching with experimentally result. The present work deals with newly synthesized sulfadiazine derivatives that are screened for their (In-vitro) antitubercular activity of compounds [7-18] is carried out against Mycobacterium tuberculosis H37Rv. compounds [8,11,13,14,15,17] are found most active (MIC=4-16 µg/mL) and compounds [7, 9,10,12,16,18] are found good to moderately active (MIC = 62.5-125 µg/mL) by using isoniazid as standard drug

Synthesis, characterization and molecular docking study of novel N-substituted sulfadiazine derivatives as potential anti-mycobacterial agents

671-677A new series N-substituted sulfadiazine derivatives attached with different heterocyclic rings such as 4-oxo-1, 4-dihydroquinazolin[7-12], 4-oxo-2H-benzo[1,3]thiazin[13-18] have been synthesized by condensation reactions.The structures of synthesized derivatives are characterized by FT-IR, 1H-NMR, 13C-NMR spectroscopic techniques, andsome physicochemical properties. A molecular docking study is performed and the binding values show very good matchingwith experimentally result. The present work deals with newly synthesized sulfadiazine derivatives that are screened fortheir (In-vitro) antitubercular activity of compounds [7-18] is carried out against Mycobacterium tuberculosis H37Rv.compounds [8,11,13,14,15,17] are found most active (MIC=4-16 μg/mL) and compounds [7, 9,10,12,16,18] are found goodto moderately active (MIC = 62.5-125 μg/mL) by using isoniazid as standard drug

4-Thiazolidinone coumarin derivatives as two-component NS2B/NS3 DENV flavivirus serine protease inhibitors: synthesis, molecular docking, biological evaluation and structure–activity relationship studies

Abstract A series of novel 4-thiazolidinone inhibitors SKYa–SKYg, containing coumarin as a core structure were synthesized via facile and efficient method. The structures of the synthesized compounds were established by extensive spectroscopic studies (FT IR, 1D NMR, 2D NMR, LC–MS) and elemental analysis. All the synthesized hybrids were further evaluated for their potential as anti-tubercular agents against Mycobacterium tuberculosis H37Rv ATCC 25618, and anti-bacterial agents against Escherichia coli, Enterobacter aerogenes, Salmonella typhi, Streptococcus pneumoniae and Staphylococcus aureus. Interestingly, the hybrids displayed potent bioactivity. However, compounds SKYc, SKYd, and SKYe appeared to be more effective against the tested bacterial strains, among which compound SKYb showed the highest inhibition against all the bacterial strains ranging from 41 to 165 μg/mL, as compared to the standards, streptomycin, kanamycin and vancomycin. Moreover, derivative SKYa was found to be the strongest against M. tuberculosis (83 μg/mL). Additionally, the anti-dengue potential of the coumarin hybrids as two-component NS2B/NS3 DENV flavivirus serine protease inhibitors was calculated using computational molecular docking approach, with reference to the standards 4-hydroxypanduratin, panduratin and ethyl 3-(4-(hydroxymethyl)-2-methoxy-5-nitrophenoxy)propanoate with DS of − 3.379, − 3.189 and − 3.381, respectively. The docking results revealed that the synthesized hybrids exhibited potent anti-dengue activity among which compounds SKYf, SKYd, SKYc and SKYe were found to be the best ones with docking scores of − 4.014, − 3.964, − 3.905 and − 3.889. In summary, we discovered 4-thiazolidinone coumarin derivatives as a new scaffold that may eventually yield useful compounds in the treatment of bacterial and viral infections