Heteroatom Chemistry最新文献_第3页

Theoretical Prediction for Synthetic Realization: Pyramidal Systems ClE[E′4R4] (E = B–Ga, E′ = C–Ge, R = SiMe3, SiMetBu2): A DFT Study 合成实现的理论预测：金字塔体系ClE[E′4R4]（E=B–Ga，E′=C–Ge，R=SiMe3，SiMetBu2）：DFT研究

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-07-22 DOI: 10.1155/2019/3659287

Olga A. Gapurenko, Vladimir Ya. Lee, Ruslan M. Minyaev, Vladimir I. Minkin

引用次数: 0

Synthesis of Benzothiophene-Fused Pyran Derivatives via Piperidine Promoted Domino Reaction 哌啶促进的多米诺反应合成苯并噻吩-吡喃衍生物

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-05-02 DOI: 10.1155/2019/4361410

Shihang Li, Aimin Yu, Jianfa Li, Xiangtai Meng

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Host-Guest Complexations of Amine Boranes and Isoelectronic/Isostructural Quaternary Alkylammonium Cations by Cucurbit[7]uril in Aqueous Solution 氨基硼烷与等电子/等结构季烷基铵阳离子在水溶液中的主客体络合作用

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-04-14 DOI: 10.1155/2019/8124696

Mona A. Gamal-Eldin, Donal H. Macartney

{"title":"Host-Guest Complexations of Amine Boranes and Isoelectronic/Isostructural Quaternary Alkylammonium Cations by Cucurbit[7]uril in Aqueous Solution","authors":"Mona A. Gamal-Eldin, Donal H. Macartney","doi":"10.1155/2019/8124696","DOIUrl":"10.1155/2019/8124696","url":null,"abstract":"<div>\u0000 The host-guest complexation of six amine boranes (R3NBH3) by the macrocyclic host molecule cucurbit[7]uril (CB[7]) in aqueous solution has been investigated using 1H and 11B NMR spectroscopy. The limiting complexation-induced 1H and 11B chemical shift changes indicate that the amine boranes are included in the hydrophobic cavity of the host molecule. The host-guest stability constants for neutral { R3NBH3∙CB[7] } complexes (in the range of 105-107M-1) have been determined by 1H NMR competition experiments and are compared with the corresponding values for the isoelectronic/isostructural { R3NCH3∙CB[7] }+ complexes. Ammonia borane (H3NBH3) does not form a host-guest complex with CB[7]. The trends in the host-guest stability constant with the guest molar volume are examined, and the stability is ascribed to the hydrophobic effect (packing coefficient) and quadrupole-dipole interactions.\u0000 </div>","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"2019 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2019-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2019/8124696","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49242806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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[4+2] versus [2+2] Homodimerization in P(V) Derivatives of 2,4-Disubstituted Phospholes [4+2]与[2+2]在2,4-二取代磷孔P(V)衍生物中的同二聚反应

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-04-01 DOI: 10.1155/2019/2596405

Guillaume Bousrez, Emmanuel Nicolas, Agathe Martinez, Sylviane Chevreux, Florian Jaroschik

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SN-Donor Methylthioanilines and Copper(II) Complexes: Synthesis, Spectral Properties, and In Vitro Antimicrobial Activity sn -供体甲基硫苯胺和铜(II)配合物:合成、光谱性质和体外抗菌活性

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-03-03 DOI: 10.1155/2019/9203435

Temitope E. Olalekan, Adeniyi S. Ogunlaja, Gareth M. Watkins

{"title":"SN-Donor Methylthioanilines and Copper(II) Complexes: Synthesis, Spectral Properties, and In Vitro Antimicrobial Activity","authors":"Temitope E. Olalekan, Adeniyi S. Ogunlaja, Gareth M. Watkins","doi":"10.1155/2019/9203435","DOIUrl":"10.1155/2019/9203435","url":null,"abstract":"<div>\u0000 Methylthioanilines, a series of sulfur-nitrogen donor ligands substituted with OCH3, CH3, Cl, and Br, and their copper(II) complexes have been synthesized and characterized by 1H and 13C NMR, elemental analysis, FTIR, UV-Vis and EPR spectra, molar conductance, and magnetic susceptibility measurements. The NMR spectra of the ligands revealed that the para/ortho protons and para carbon were sensitive to the electronic effect of substituents. The CHNS analysis presented CuLCl2 (L = OCH3, CH3, Cl) and CuL2Cl2 (L = Br) stoichiometries for the copper complexes. FTIR spectra showed that the bidentate ligands were coordinated to the copper ion through their nitrogen and sulfur atoms. The electronic spectra have suggested square planar and octahedral geometries for these complexes. The EPR spectra demonstrated that the solid state copper(II) complexes possess <math></math> orbital ground state and g∥ > g⊥ > 2.0023 in a tetragonal environment. The compounds were evaluated for in vitro antimicrobial activity against S. aureus, B. subtilis, E. coli, and C. albicans. The copper complexes showed higher activity than the parent ligands against S. aureus and B. subtilis; the electron-donating OCH3 and CH3 derivatives were more active than the withdrawing Br- and Cl-substituted compounds.\u0000 </div>","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"2019 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2019-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2019/9203435","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43652585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational Studies of 4-Formylpyridinethiosemicarbazone and Structural and Biological Studies of Its Ni(II) and Cu(II) Complexes 4-甲酰基吡啶乙硫代氨基脲的计算研究及其Ni(II)和Cu(II)配合物的结构和生物学研究

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-03-03 DOI: 10.1155/2019/3507837

Mydhili P. Sripathi, Sireesha Berely, Chittireddy Venkata Ramana Reddy

{"title":"Computational Studies of 4-Formylpyridinethiosemicarbazone and Structural and Biological Studies of Its Ni(II) and Cu(II) Complexes","authors":"Mydhili P. Sripathi, Sireesha Berely, Chittireddy Venkata Ramana Reddy","doi":"10.1155/2019/3507837","DOIUrl":"10.1155/2019/3507837","url":null,"abstract":"<div>\u0000 To understand the stability, chelation behaviour, and biological activity of 4-Formylpyridinethiosemicarbazone (H4FPT), it is important to recognize its interactive geometry. Hence, computational studies on geometrically optimized structures of thione and thiol forms of H4FPT were performed. Binary metal complexes of the ligand, H4FPT (L) with the Ni(II) and Cu(II) metal ions (M), were synthesized and characterized by various spectroanalytical techniques as elemental analysis, molar conductance, magnetic susceptibility measurements, LC-MS, TGA, IR, UV-Visible, ESR, and powder XRD. Elemental analysis, LC-MS, and TGA studies indicate 1:2 (ML2) composition for mononuclear Ni(II) complex and 1:1 (ML) composition for dinuclear Cu(II) complex. Electronic absorption titrations, fluorescence quenching studies, and viscosity measurements suggest intercalative mode of binding of the complexes with calf thymus DNA (CT-DNA). These complexes also promote hydrolytic cleavage of plasmid pBR322. The ligand (H4FPT) and its complexes showed moderate-to-good activity against Gram-positive and Gram-negative bacterial strains. The DPPH radical scavenging studies showed antioxidant nature of both complexes.\u0000 </div>","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"2019 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2019-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2019/3507837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43443146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Pot Synthesis of Hypervalent Diaryl(iodo)bismuthanes from o-Carbonyl Iodoarenes by Zincation 邻羰基碘芳烃锌催化一锅法合成高价二芳基(碘)铋

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-02-27 DOI: 10.1155/2019/2385064

Toshihiro Murafuji, A. F. M. Hafizur Rahman, Daiki Magarifuchi, Masahiro Narita, Isamu Miyakawa, Katsuya Ishiguro, Shin Kamijo

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On the Reactivity of N-tert-Butyl-1,2-Diaminoethane: Synthesis of 1-tert-Butyl-2-Imidazoline, Formation of an Intramolecular Carbamate Salt from the Reaction with CO2, and Generation of a Hydroxyalkyl-Substituted Imidazolinium Salt 关于N-叔丁基-1,2-二氨基乙烷的反应性：1-叔丁基-2-咪唑啉的合成、与CO2反应生成分子内氨基甲酸盐和生成羟烷基取代咪唑鎓盐

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-02-05 DOI: 10.1155/2019/1094173

Kieren J. Evans, Ben Potrykus, Stephen M. Mansell

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Thiazole Based Carbohydrazide Derivatives as α-Amylase Inhibitor and Their Molecular Docking Study 噻唑类碳酰肼衍生物作为α-淀粉酶抑制剂及其分子对接研究

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-02-04 DOI: 10.1155/2019/7502347

Muhammad Taha, Maryam Irshad, Syahrul Imran, Fazal Rahim, Manikandan Selvaraj, Noor Barak Almandil, Ashik Mosaddik, Sridevi Chigurupati, Faisal Nawaz, Nor Hadiani Ismail, Mohamed Ibrahim

{"title":"Thiazole Based Carbohydrazide Derivatives as α-Amylase Inhibitor and Their Molecular Docking Study","authors":"Muhammad Taha, Maryam Irshad, Syahrul Imran, Fazal Rahim, Manikandan Selvaraj, Noor Barak Almandil, Ashik Mosaddik, Sridevi Chigurupati, Faisal Nawaz, Nor Hadiani Ismail, Mohamed Ibrahim","doi":"10.1155/2019/7502347","DOIUrl":"10.1155/2019/7502347","url":null,"abstract":"<div>\u0000 In this study we are going to present thiazole based carbohydrazide in search of potent antidiabetic agent as α-amylase inhibitors. Thiazole based carbohydrazide derivatives 1-25 have been synthesized, characterized by 1HNMR, 13CNMR, and EI-MS, and evaluated for α-amylase inhibition. Except compound 11 all analogs showed α-amylase inhibitory activity with IC50 values from 1.709 ± 0.12 to 3.049 ± 0.25 μM against the standard acarbose (IC50 = 1.637 ± 0.153 μM). Compounds 1, 10, 14, and 20 exhibited outstanding inhibitory potential with IC50 value 1.763 ± 0.03, 1.747 ± 0.20, 1.709 ± 0.12, and 1.948 ± 0.23 μM, respectively, compared with the standard acarbose. Structure activity relationships have been established for the active compounds. To get an idea about the binding interaction of the compounds, molecular docking studies were done.\u0000 </div>","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"2019 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2019-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2019/7502347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43814221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tautomeric Equilibria in Solutions of 2-Phenacylbenzimidazoles 2-苯基苯并咪唑溶液中的互变异构平衡

IF 1.1 4区化学

Heteroatom Chemistry Pub Date : 2019-02-03 DOI: 10.1155/2019/4364207

Agnieszka Skotnicka, Przemysław Czeleń, Ryszard Gawinecki

引用次数: 0