Heteroatom Chemistry最新文献_第7页

Reactions of aminopyrimidine derivatives with chloroacetyl and isophthaloyl chlorides 氨基嘧啶衍生物与氯乙酰和异苯甲酰氯的反应

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-26 DOI: 10.1002/hc.21458

Zeynep Çimen, Senem Akkoç, Zülbiye Kökbudak

引用次数: 7

Synthesis and molecular structure of functionalized tris[2-(4′-substituted butoxyphenyl)]phosphine oxides as precursors of tripodal ligands 作为三足配体前体的功能化三[2-(4 ' -取代丁氧基苯基)]膦氧化物的合成和分子结构

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-26 DOI: 10.1002/hc.21454

Tat'yana V. Baulina, Igor Yu. Kudryavtsev, Alexander F. Smolyakov, Margarita P. Pasechnik, Valery K. Brel

引用次数: 5

Synthesis and properties of redox-switchable zinc complexes of 10,15,20-triaryl-15-aza-5-oxaporphyrin 10,15,20-三芳基-15-氮杂-5-氧卟啉锌配合物的合成与性质

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-26 DOI: 10.1002/hc.21456

Keisuke Sudoh, Ko Furukawa, Haruyuki Nakano, Soji Shimizu, Yoshihiro Matano

{"title":"Synthesis and properties of redox-switchable zinc complexes of 10,15,20-triaryl-15-aza-5-oxaporphyrin","authors":"Keisuke Sudoh, Ko Furukawa, Haruyuki Nakano, Soji Shimizu, Yoshihiro Matano","doi":"10.1002/hc.21456","DOIUrl":"10.1002/hc.21456","url":null,"abstract":"The synthesis, aromaticity, and optical and electrochemical properties of zinc(II) complexes of 10,15,20-triaryl-15-aza-5-oxaporphyrin (TriAAOP) were investigated. Metal-templated cyclization of a zinc(II) 1,19-dichloro-5,10,15-triaryl-10-azatetrapyrrin complex with an oxygen source afforded 20π TriAAOP in the neutral form. Oxidation of 20π TriAAOP with silver (I) hexafluorophosphate generated the 19π radical cation or 18π dication depending on the content of oxidant used. The interconversion between the three oxidation states (18π, 19π, and 20π) resulted in distinct changes in the aromaticity and optical properties of the 15-aza-5-oxaporphyrin π-system. Nuclear magnetic resonance spectroscopy of 20π TriAAOP revealed its antiaromatic character, whereas that of the 18π TriAAOP dication showed its aromatic character. The combined effect of the two meso-heteroatoms was directly reflected in the redox properties of the porphyrin ring; TriAAOP was reduced more easily and more difficult to oxidize than the zinc(II) complex of 5,10,15,20-tetraaryl-5,15-diaz-aporphyrin (TADAP). In the ultraviolet-visible-near–infrared spectra of the materials, the lowest-energy electronic excitations of the 19π and 18π TriAAOP derivatives were considerably red-shifted compared with those of the isoelectronic TADAP derivatives. Based on the results of density functional theory calculations, it was concluded that the observed differences between TriAAOP and TADAP would arise from the high electronegativity of oxygen; specific frontier orbitals of the TriAAOP π-systems were energetically stabilized relative to those of the TADAP π-system. The present findings corroborate that the meso-modification of a porphyrin rings with different kinds of heteroatoms is a promising strategy to fine tune their light-response properties that are switchable by reversible single electron transfer processes.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 5-6","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44022101","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: 6

Electrochemical studies of the multi-step multi-electron redox process of tetraferrocenyloligothiophenes with electron donor and acceptor abilities 具有电子供体和受体能力的四茂铁基低聚噻吩多步多电子氧化还原过程的电化学研究

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-20 DOI: 10.1002/hc.21455

Hiroki Muraoka, Kouhei Ozawa, Satoshi Ogawa

引用次数: 1

π-Dimerization ability of conjugated oligomer dication diradicaloids composed of dithienylpyrrole and benzodithiophene units 由二噻吩基吡咯和苯并二噻吩单元组成的共轭低聚物二己二酸的π-二聚能力

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-20 DOI: 10.1002/hc.21452

Takahiro Akahane, Masayoshi Takase, Yasuhiro Mazaki, Tohru Nishinaga

{"title":"π-Dimerization ability of conjugated oligomer dication diradicaloids composed of dithienylpyrrole and benzodithiophene units","authors":"Takahiro Akahane, Masayoshi Takase, Yasuhiro Mazaki, Tohru Nishinaga","doi":"10.1002/hc.21452","DOIUrl":"10.1002/hc.21452","url":null,"abstract":"Stable conjugated oligomer dications 12+ and 22+ composed of 2,5-di(2-thienyl)-N-methylpyrrole (DTP) units at the both ends of the π-systems with methoxy substituents at the 3-position of thienyl units and methylthio end-capping group and benzo[2,1-b:3,4-b′]dithiophene (BDT) unit(s) at the central part with sterically demanding phenyl substituents were synthesized. From DFT calculations and ESR experiments, it was concluded that the diradical character in 12+ and 22+ was reduced in comparison with the radical character of their reference compound 3·+ composed of one DTP and one BDT units. In addition, the shorter 12+ was considered to have a further lower diradical character than that of 22+. Nevertheless, judging from the results of VT-UV-vis-NIR measurements, both 12+ and 22+ showed a comparable π-dimerization ability at the DTP moiety in dichloromethane solution with 3·+.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 5-6","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47542333","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: 1

Condensations based on 5-(indol-3-yl)-pyrrolidin-2-thiones 基于5-（吲哚-3-基）-吡咯烷-2-硫酮的缩合反应

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-20 DOI: 10.1002/hc.21451

Andrey V. Sadovoy, Veronica V. Kattsyna, Polina S. Protopopova, Yulia V. Nelyubina, Alexander A. Pavlov, Konstantin A. Kochetkov, Lyudmila A. Sviridova

引用次数: 1

Synthesis of P-stereogenic phosphonothioates via alcoholysis of phosphonothioates with a binaphthyl group 用二萘基对硫代膦酸酯醇解合成对立体硫代膦酸酯

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-17 DOI: 10.1002/hc.21448

Kazuma Kuwabara, Yuuki Maekawa, Masahiro Ebihara, Toshifumi Maruyama, Toshiaki Murai

引用次数: 3

Group 13 metal carbochalcogenoato complexes: Synthesis, X-ray structure analysis, and reactions 13族金属碳硫配合物:合成、x射线结构分析和反应

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-12 DOI: 10.1002/hc.21445

Norio Nakata, Shinzi Kato, Osamu Niyomura, Masahiro Ebihara

{"title":"Group 13 metal carbochalcogenoato complexes: Synthesis, X-ray structure analysis, and reactions","authors":"Norio Nakata, Shinzi Kato, Osamu Niyomura, Masahiro Ebihara","doi":"10.1002/hc.21445","DOIUrl":"10.1002/hc.21445","url":null,"abstract":"A series of alkali metal tetrakis(carbochalcogenoato)-gallates and -indates M[M′(EOCR)4](solv.) (M = alkali metal; M′ = Ga, In; E = S, Se) and tris(carbodithioato)aluminum, -gallates and -indates M′ (SSCR)3 (M′ = Al, Ga, In) were prepared by the reactions of alkali metal carbochalcogenate with metal trihalogenides (M′X3; M′ = Al, Ga, In; X = Cl, Br) and by those of piperidinium carbodithioates or carbodithioic and carboselenoic acids with M′X3, respectively. An X-ray molecular structure analysis revealed that they have an acetone molecule as a crystal solvent. The reactions of the potassium complexes K[M′ (EOCR)4](H2O) (E = S, Se) with methanol and primary and secondary amines gave the corresponding methyl ester and amides in good yields, while the reactions with iodomethane and iodine gave S- and Se-methyl chalcogenoesters RCOEMe (E = S, Se) in good yields. Similar reactions of the tris(carbodithioato)gallates and -indates led to the corresponding O-methyl thioesters, thioamides, and S-methyl dithioesters in moderate to good yields. Oxidation of the tetrakis- and tris-derivatives with iodine afforded the corresponding diacyl dichalcogenides (RCOE)2 (E = S, Se) and di(carbothioyl) disulfides in quantitative yields. These reactions appeared to occur on the carbonyl or selenium atom of the tetrakis compounds and on the sulfide sulfur or thiocarbonyl carbon atom of the tris-compounds, respectively. A possible mechanism for these I2-oxidation reactions is discussed.","PeriodicalId":12816,"journal":{"name":"Heteroatom Chemistry","volume":"29 5-6","pages":""},"PeriodicalIF":0.3,"publicationDate":"2018-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/hc.21445","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45522401","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: 2

The arginine detection and cytotoxicity of fluorescent probes based on naphthalene derivatives 基于萘衍生物的荧光探针精氨酸检测及细胞毒性研究

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-12 DOI: 10.1002/hc.21449

Xuefang Shang, Congshu Li, Jie Li, Yanmei Chen, Hongli Chen, Tianyun Wang

引用次数: 2

Reaction of arynes with trifluoroacetylated β-diketones: Novel formation of isocoumarins and phenanthrenes 芳香烃与三氟乙酰化β-二酮的反应:异香豆素和菲的新形成

IF 0.3 4区化学

Heteroatom Chemistry Pub Date : 2018-11-02 DOI: 10.1002/hc.21444

Kentaro Okuma, Yukiko Tanabe, Takuto Fukami, Yuto Ishibashi

引用次数: 2