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Gregory S Hamilton - One of the best experts on this subject based on the ideXlab platform.
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Formation of nitrogen‐containing heterocycles using di(imidazole‐1‐yl)Methanimine
Journal of Heterocyclic Chemistry, 2020Co-Authors: Yongqian Wu, Douglas E Wilkinson, David C Limburg, Gregory S HamiltonAbstract:A mild and efficient synthesis of five- and six-membered nitrogen containing heterocyclic compounds, in which di(imidazole-1-yl)Methanimine serves as a one-carbon source, is reported.
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formation of nitrogen containing heterocycles using di imidazole 1 yl Methanimine
Journal of Heterocyclic Chemistry, 2003Co-Authors: Yongqian Wu, Douglas E Wilkinson, David C Limburg, Gregory S HamiltonAbstract:A mild and efficient synthesis of five- and six-membered nitrogen containing heterocyclic compounds, in which di(imidazole-1-yl)Methanimine serves as a one-carbon source, is reported.
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direct synthesis of guanidines using di imidazole 1 yl Methanimine
Journal of Organic Chemistry, 2002Co-Authors: Yongqian Wu, Sean K Hamilton, Douglas E Wilkinson, Gregory S HamiltonAbstract:A direct synthetic approach to guanidine compounds is reported here using di(imidazole-1-yl)Methanimine and di(imidazole-1-yl)cyanoMethanimine as guanylating reagents.
Busra Yenturk - One of the best experts on this subject based on the ideXlab platform.
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experimental and theoretical analysis of n n ethane 1 2 diylbis 4 1 phenylene bis 1 thiophen 2 yl Methanimine and n n ethane 1 2 diylbis 4 1 phenylene bis 1 4 methylthiophen 2 yl Methanimine schiff base ligands
Journal of The Chilean Chemical Society, 2019Co-Authors: Guhergul Ulucam, Busra YenturkAbstract:N,N’-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(thiophen-2-yl)Methanimine) and N,N’-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(4-methylthiophen-2-yl) Methanimine) ligands are formed by diamine and two aromatic aldehyde using Schiff base condensation method. Ligands are characterised by fourier transform infrared spectroscopy (FT-IR), 1H- and 13C- nuclear magnetic resonance spectroscopy (1H- and 13C- NMR) and mass spectroscopy (LC ESI/MS) methods. Furthermore, geometric properties such as bond lenghts, bond angles, dihedral angles, electronic properties, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies are calculated by using Gaussian 09w program. Experimental and theoretical spectrum datas are compared.
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EXPERIMENTAL AND THEORETICAL ANALYSIS OF N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(THIOPHEN-2-YL)Methanimine) AND N,N’-(ETHANE-1,2-DIYLBIS(4,1-PHENYLENE))BIS(1-(4-METHYLTHIOPHEN-2-YL)Methanimine) SCHIFF BASE LIGANDS
Journal of The Chilean Chemical Society, 2019Co-Authors: Guhergul Ulucam, Busra YenturkAbstract:N,N’-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(thiophen-2-yl)Methanimine) and N,N’-(ethane-1,2-diylbis(4,1-phenylene))bis(1-(4-methylthiophen-2-yl) Methanimine) ligands are formed by diamine and two aromatic aldehyde using Schiff base condensation method. Ligands are characterised by fourier transform infrared spectroscopy (FT-IR), 1H- and 13C- nuclear magnetic resonance spectroscopy (1H- and 13C- NMR) and mass spectroscopy (LC ESI/MS) methods. Furthermore, geometric properties such as bond lenghts, bond angles, dihedral angles, electronic properties, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies are calculated by using Gaussian 09w program. Experimental and theoretical spectrum datas are compared.
Yongqian Wu - One of the best experts on this subject based on the ideXlab platform.
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Formation of nitrogen‐containing heterocycles using di(imidazole‐1‐yl)Methanimine
Journal of Heterocyclic Chemistry, 2020Co-Authors: Yongqian Wu, Douglas E Wilkinson, David C Limburg, Gregory S HamiltonAbstract:A mild and efficient synthesis of five- and six-membered nitrogen containing heterocyclic compounds, in which di(imidazole-1-yl)Methanimine serves as a one-carbon source, is reported.
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formation of nitrogen containing heterocycles using di imidazole 1 yl Methanimine
Journal of Heterocyclic Chemistry, 2003Co-Authors: Yongqian Wu, Douglas E Wilkinson, David C Limburg, Gregory S HamiltonAbstract:A mild and efficient synthesis of five- and six-membered nitrogen containing heterocyclic compounds, in which di(imidazole-1-yl)Methanimine serves as a one-carbon source, is reported.
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direct synthesis of guanidines using di imidazole 1 yl Methanimine
Journal of Organic Chemistry, 2002Co-Authors: Yongqian Wu, Sean K Hamilton, Douglas E Wilkinson, Gregory S HamiltonAbstract:A direct synthetic approach to guanidine compounds is reported here using di(imidazole-1-yl)Methanimine and di(imidazole-1-yl)cyanoMethanimine as guanylating reagents.
Maciej Kubicki - One of the best experts on this subject based on the ideXlab platform.
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Isomorphism in Two (E)-1-(4-Halophenyl)-N-[1-(4-Methylphenyl)-1H-Imidazol-4-yl]Methanimines (Halide = Cl, Br)
Journal of Chemical Crystallography, 2012Co-Authors: Hanna Skrzypiec, Radosław Mazurek, Paweł Wagner, Maciej KubickiAbstract:The crystal structures of two imidazole-4-imines, ( E )-1-(4-chlorophenyl)- N -[1-(4-methylphenyl)-1 H -imidazol-4-yl]Methanimine ( 1 , C_17H_14ClN_3), and ( E )-1-(4-bromophenyl)- N -[1-(4-methylphenyl)-1 H -imidazol-4-yl]Methanimine, ( 2 , C_17H_14BrN_3), are isomorphous, the isostructurality index is 99.4 %. Both compounds crystallize in the triclinic space group P-1 with unit cell parameters at 100(1) K as follows: for ( 1 ), a = 7.9767(5) Å, b = 10.9517(7) Å, c = 16.6753(12) Å, α = 80.522(6)°, β = 87.046(6)°, γ = 89.207(5)°, and for ( 2 ), a = 8.0720(7) Å, b = 10.9334(10) Å, c = 16.8433(13) Å, α = 81.161(7)°, β = 86.605(7)°, γ = 89.505(7)°. The structures contain two symmetry—independent but conformationally similar molecules in the asymmetric unit (Z’ = 2). In both compounds the overall twist of the molecule, defined as the dihedral angle between the terminal phenyl ring planes is significant, around 56°. The crystal packing is determined mainly be weak specific intermolecular interactions: the C–H···N hydrogen bonds connect molecules into infinite chains, and the chains are linked via C–H···X hydrogen bonds and by π–π interactions. This study illustrates the significant role of the weak interactions, which—in spite of their weakness—can robustly repeat in the crystal structures of similar compounds. Graphical Abstract Two imidazole-4-imines, ( E )-1-(4-chlorophenyl)- N -[1-(4-methylphenyl)-1 H -imidazol-4-yl]Methanimine, and ( E )-1-(4-bromophenyl)- N -[1-(4-methylphenyl)-1 H -imidazol-4-yl]Methanimine, are isomorphous, the isostructurality index is 99.4 %.
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Isomorphism in Two (E)-1-(4-Halophenyl)-N-[1-(4-Methylphenyl)-1H-Imidazol-4-yl]Methanimines (Halide = Cl, Br)
Journal of Chemical Crystallography, 2012Co-Authors: Hanna Skrzypiec, Radosław Mazurek, Pawel Wagner, Maciej KubickiAbstract:The crystal structures of two imidazole-4-imines, (E)-1-(4-chlorophenyl)-N-[1-(4-methylphenyl)-1H-imidazol-4-yl]Methanimine (1, C17H14ClN3), and (E)-1-(4-bromophenyl)-N-[1-(4-methylphenyl)-1H-imidazol-4-yl]Methanimine, (2, C17H14BrN3), are isomorphous, the isostructurality index is 99.4 %. Both compounds crystallize in the triclinic space group P-1 with unit cell parameters at 100(1) K as follows: for (1), a = 7.9767(5) A, b = 10.9517(7) A, c = 16.6753(12) A, α = 80.522(6)°, β = 87.046(6)°, γ = 89.207(5)°, and for (2), a = 8.0720(7) A, b = 10.9334(10) A, c = 16.8433(13) A, α = 81.161(7)°, β = 86.605(7)°, γ = 89.505(7)°. The structures contain two symmetry—independent but conformationally similar molecules in the asymmetric unit (Z’ = 2). In both compounds the overall twist of the molecule, defined as the dihedral angle between the terminal phenyl ring planes is significant, around 56°. The crystal packing is determined mainly be weak specific intermolecular interactions: the C–H···N hydrogen bonds connect molecules into infinite chains, and the chains are linked via C–H···X hydrogen bonds and by π–π interactions. This study illustrates the significant role of the weak interactions, which—in spite of their weakness—can robustly repeat in the crystal structures of similar compounds. Two imidazole-4-imines, (E)-1-(4-chlorophenyl)-N-[1-(4-methylphenyl)-1H-imidazol-4-yl]Methanimine, and (E)-1-(4-bromophenyl)-N-[1-(4-methylphenyl)-1H-imidazol-4-yl]Methanimine, are isomorphous, the isostructurality index is 99.4 %.
Komal Rizwan - One of the best experts on this subject based on the ideXlab platform.
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role of pyridine nitrogen in palladium catalyzed imine hydrolysis a case study of e 1 3 bromothiophen 2 yl n 4 methylpyridin 2 yl Methanimine
Molecules, 2019Co-Authors: Gulraiz Ahmad, Komal Rizwan, Nasir Rasool, Tariq Mahmood, Ataf Ali Altaf, Umer Rashid, Mohd Zobir Hussein, Khurshid AyubAbstract:In the present study, 4-methylpyridin-2-amine was reacted with 3-bromothiophene-2-carbaldehyde and the Schiff base (E)-1-(3-bromothiophen-2-yl)-N-(4-methylpyridin-2-yl)Methanimine was obtained in a 79% yield. Coupling of the Schiff base with aryl/het-aryl boronic acids under Suzuki coupling reaction conditions, using Pd(PPh3)4 as catalyst, yielded products with the hydrolysis of the imine linkages (5a–5k, 6a–6h) in good to moderate yields. To gain mechanistic insight into the transition metal-catalyzed hydrolysis of the compounds, density functional theory (DFT) calculations were performed. The theoretical calculations strongly supported the experiment and provided an insight into the transition metal-catalyzed hydrolysis of imines.
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facile synthesis of n 4 bromophenyl 1 3 bromothiophen 2 yl Methanimine derivatives via suzuki cross coupling reaction their characterization and dft studies
Chemistry Central Journal, 2018Co-Authors: Komal Rizwan, Nasir Rasool, Ravya Rehman, Tariq Mahmood, Khurshid Ayub, Tahir Rasheed, Gulraiz Ahmad, Ayesha Malik, Shakeel Ahmad KhanAbstract:A variety of imine derivatives have been synthesized via Suzuki cross coupling of N-(4-bromophenyl)-1-(3-bromothiophen-2-yl)Methanimine with various arylboronic acids in moderate to good yields (58–72%). A wide range of electron donating and withdrawing functional groups were well tolerated in reaction conditions. To explore the structural properties, Density functional theory (DFT) investigations on all synthesized molecules (3a–3i) were performed. Conceptual DFT reactivity descriptors and molecular electrostatic potential analyses were performed by using B3LYP/6-31G(d,p) method to explore the reactivity and reacting sites of all derivatives (3a–3i).