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Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines

A series of benzimidazole-tethered oxazepine heterocyclic hybrids has been synthesized in good to excellent yields from an N-alkylated benzimidazole 2-carboxaldehyde, which in turn was accomplished from o-phenylenediamine in three good yielding steps. The calculated molecular structure of compounds...

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Autores principales: Almansour, Abdulrahman I., Arumugam, Natarajan, Suresh Kumar, Raju, Soliman, Saied M., Altaf, Mohammad, Ghabbour, Hazem A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6272878/
https://www.ncbi.nlm.nih.gov/pubmed/27271585
http://dx.doi.org/10.3390/molecules21060724
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author Almansour, Abdulrahman I.
Arumugam, Natarajan
Suresh Kumar, Raju
Soliman, Saied M.
Altaf, Mohammad
Ghabbour, Hazem A.
author_facet Almansour, Abdulrahman I.
Arumugam, Natarajan
Suresh Kumar, Raju
Soliman, Saied M.
Altaf, Mohammad
Ghabbour, Hazem A.
author_sort Almansour, Abdulrahman I.
collection PubMed
description A series of benzimidazole-tethered oxazepine heterocyclic hybrids has been synthesized in good to excellent yields from an N-alkylated benzimidazole 2-carboxaldehyde, which in turn was accomplished from o-phenylenediamine in three good yielding steps. The calculated molecular structure of compounds 2-methyl-4-(2-((phenylimino)methyl)-1H-benzo-[d]imidazol-1-yl)-butan-2-ol 9 and 10 3,3-dimethyl-N-phenyl-1,2,3,5-tetrahydrobenzo-[4,5]imidazo[2,1-c][1,4]oxazepin-5-amine using the B3LYP/6–31 G(d, p) method were found to agree well with their X-ray structures. The charge distributions at the different atomic sites were computed using the natural bond orbital (NBO) method. The regions of electrophilic and nucleophilic reactivity were shown using a molecular electrostatic potential (MEP) map. In addition, the frontier molecular orbitals of these compounds were discussed at the same level of theory. Nonlinear optical (NLO) properties have also been investigated by computational hyperpolarizability studies, and it was found that Compound 9 is the best candidate for NLO applications.
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spelling pubmed-62728782018-12-28 Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines Almansour, Abdulrahman I. Arumugam, Natarajan Suresh Kumar, Raju Soliman, Saied M. Altaf, Mohammad Ghabbour, Hazem A. Molecules Article A series of benzimidazole-tethered oxazepine heterocyclic hybrids has been synthesized in good to excellent yields from an N-alkylated benzimidazole 2-carboxaldehyde, which in turn was accomplished from o-phenylenediamine in three good yielding steps. The calculated molecular structure of compounds 2-methyl-4-(2-((phenylimino)methyl)-1H-benzo-[d]imidazol-1-yl)-butan-2-ol 9 and 10 3,3-dimethyl-N-phenyl-1,2,3,5-tetrahydrobenzo-[4,5]imidazo[2,1-c][1,4]oxazepin-5-amine using the B3LYP/6–31 G(d, p) method were found to agree well with their X-ray structures. The charge distributions at the different atomic sites were computed using the natural bond orbital (NBO) method. The regions of electrophilic and nucleophilic reactivity were shown using a molecular electrostatic potential (MEP) map. In addition, the frontier molecular orbitals of these compounds were discussed at the same level of theory. Nonlinear optical (NLO) properties have also been investigated by computational hyperpolarizability studies, and it was found that Compound 9 is the best candidate for NLO applications. MDPI 2016-06-03 /pmc/articles/PMC6272878/ /pubmed/27271585 http://dx.doi.org/10.3390/molecules21060724 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Almansour, Abdulrahman I.
Arumugam, Natarajan
Suresh Kumar, Raju
Soliman, Saied M.
Altaf, Mohammad
Ghabbour, Hazem A.
Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title_full Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title_fullStr Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title_full_unstemmed Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title_short Synthesis, Spectroscopic, X-ray Diffraction and DFT Studies of Novel Benzimidazole Fused-1,4-Oxazepines
title_sort synthesis, spectroscopic, x-ray diffraction and dft studies of novel benzimidazole fused-1,4-oxazepines
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6272878/
https://www.ncbi.nlm.nih.gov/pubmed/27271585
http://dx.doi.org/10.3390/molecules21060724
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