Showing posts with label hydrogen bond. Show all posts
Showing posts with label hydrogen bond. Show all posts

Monday, 18 March 2024

Investigating the Novel Hydrogen-Bonded Charge Transfer Complex between Chloranilic Acid and 2-Amino-4, 6-Dimethylpyridine: Spectroscopic Characterization, Molecular Modeling and DFT/TD-DFT/PCM Calculations | Chapter 3 | Recent Developments in Chemistry and Biochemistry Research Vol. 1

Spectroscopic analysis, molecular modelling, and DFT/TD-DFT/PCM calculations of a novel hydrogen-bonded charge transfer complex formed by chloranilic acid and 2-amino-4, 6-dimethylpyridine. A charge transfer hydrogen-bonded complex between the electron donor (proton acceptor) 2-amino-4,6-dimethylpyridine and the electron acceptor (proton donor) chloranilic acid was synthesised and explored experimentally and theoretically. The stability constant showed high values, indicating that the produced compound was highly stable. The stoichiometric ratio for chloroform, ethanol, methanol, and acetonitrile was found to be 1:1. The solid compound was created and characterised using various spectroscopic techniques. FTIR, 1H, and 13C NMR experiments confirmed the presence of proton and charge transfers in the produced complex. In addition to experimental data, molecular modelling using density functional theory (DFT) was performed in gas, chloroform, and methanol phases to account for charge and hydrogen transfers. Overall, experimental and theoretical computations were consistent.


Author(s) Details:

Khairia M. Al-Ahmary,
Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.

Fatimah A. Alshehri,
Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia and Department of Chemistry, Faculty of Science and Arts, University of Bisha, Alnamas, Saudi Arabia.

Faten M. Atlam,
Theoretical Applied Chemistry Unit (TACU), Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.

Mohamed K. Awad,
Theoretical Applied Chemistry Unit (TACU), Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.

Please see the link here: https://stm.bookpi.org/RDCBR-V1/article/view/13610

Sunday, 30 January 2022

Epigenetic Drugs, and Their Virtual Screening Study Retrieved from ZINC Database Along with an AutoDock Study of the Best Inhibitor | Chapter 04 | Current Aspects in Pharmaceutical Research and Development Vol. 7

 Cancer epigenetics research has advanced significantly in the previous 30 years. From embryogenesis to adulthood, epigenetic events play a role in the human life cycle. It is important to understand that epigenetic misregulation may contribute to cancer formation, and we must continue to search for anti-neoplastic epi-drugs. Taking this into account, our first goal is to use virtual screening to find effective epi-drugs from the ZINC database, as well as to investigate the validity of virtual screening. The second goal is to use a docking experiment to investigate the binding conformation of the highest affinity ligands against macromolecules.

Our Virtual Screening by Docking (VSDK) technique and procedure were used to accomplish the virtual screening. The ZINC database downloads small compounds at random. AutoDock 4.2.6 and AutoDock Tool were utilised in the docking experiment.The successful virtual screening of the 2778 tiny molecules chosen at random from the ZINC database took eight to ten hours. The first rated inhibitors of histone H2B E76K mutant (HHEM) and DNA methyltransferase (DNMT) were 1H-1,2,4-triazole-3,5-diamine and 2-ethyl-1,3,4-oxadiazole, respectively.

Conclusion: Most of the top 10 HHEM and DNMT inhibitors have 5-member rings in their chemical structures, as determined by virtual screening. A virtual screening experiment would be considered effective if the affinity difference between the top and bottom 10 compounds was greater than two times. The histogram chart of AutoDock4 runs showed two or three hydrogen bonds in the lowest affinity region, indicating a consistent conformation docking.

Author(S) Details

Eiichi Akaho
Faculty of Pharmaceutical Sciences, Kobe Gakuin Univercity, 1-1-3 Minatojima, Chuo-ku, Kobe, 6508586, Japan.

View Book:- https://stm.bookpi.org/CAPRD-V7/article/view/5412