Novel Perylene Chromophores Obtained by a Facile Oxidative Cyclodehydrogenation Route
摘要:
New perylene chromophores, phenyl-substituted diindeno[1.2.3-cd: 1',2',3'-lm]perylenes 5 a,b and 4.4'.7,7'-tetraphenyldiacenaphtho[1.2-k:1',2',k']diindeno[1,2,3-cd :1'.2'.3'-me]perylenes 22 a,b, have been synthesized from substituted fluoranthene derivatives 3a,b and 4a,b by means of a surprisingly simple oxidative cyclodehydrogenation reaction. The resulting chromophores, when substituted with alkyl chains at the periphery, show good solubility in organic solvents, and a full characterization of the novel red, green, and blue dyes by field-desorption mass spectrometry, UV/Vis and H-1 and C-13 NMR spectroscopy becomes possible.
Reaction of 1,8-bis(phenylethynyl)naphthalene with phenylchlorocarbene: formation of an intramolecular cyclization product from the carbene monoadduct and of 1,8-naphthylenebis(diphenylcyclopropenylium) dication from the bisadduct
Attempts to detect acenaphthyne (I) in the reactions: (a) dehalogenation of 1,2-dibromo-acenaphthylene, (b) pyrolysis of bis-[1-bromoacenaphthylenyl-(2)]mercury and (c) oxidation of acenaphthenequinone-bishydrazone with HgO and MnO2 are described. It is shown that the products in the presence of 2,5-diphenyl-3,4-benzofurane and tetraphenylcyclopentadienone are unlikely to involve I as an intermediate
Synthesis of Fluoranthenes and Indenocorannulenes: Elucidation of Chiral Stereoisomers on the Basis of Static Molecular Bowls
作者:Yao-Ting Wu、Tomoharu Hayama、Kim K. Baldridge、Anthony Linden、Jay S. Siegel
DOI:10.1021/ja058391a
日期:2006.5.1
aromatics. Fluoranthenes 9 (or 13) are easily accessible in good to excellent yields (75-99%; 18 examples) from the reaction of symmetric (or asymmetric) diynes 4 and alkynes 5 (or norbornadiene) in the presence of Wilkinson's catalyst. This formal [(2+2)+2] cycloaddition can also be applied to generate various indenocorannulenes 28 from 2,3-diethynylcorannulene derivatives 27 and alkynes 5. The indenocorannulenes
Fluoranthene-based triarylamines as hole-transporting and emitting materials for efficient electroluminescent devices
作者:Neha Kapoor、K. R. Justin Thomas
DOI:10.1039/c0nj00415d
日期:——
Electroluminescent materials based on the fluoranthene core and containing triarylamine segments were synthesized and characterized by IR, NMR, UV-Vis, and emission spectroscopic, electrochemical, and thermal studies. The electronic absorption and emission characteristics of the new functional materials were affected by the nature of the chromophore present on the fluoranthene nucleus. Incorporation of
Nickel-catalyzed skeletal transformation of tropone derivatives <i>via</i> C–C bond activation: catalyst-controlled access to diverse ring systems
作者:Takuya Kodama、Kanako Saito、Mamoru Tobisu
DOI:10.1039/d2sc01394k
日期:——
We report herein on nickel-catalyzed carbon–carbon bondcleavage reactions of 2,4,6-cycloheptatrien-1-one (tropone) derivatives. When a Ni/N-heterocycliccarbene catalyst is used, decarbonylation proceeds with the formation of a benzene ring, while the use of bidentate ligands in conjunction with an alcohol additive results in a two-carbon ring contraction with the generation of cyclopentadiene derivatives
我们在此报告了镍催化的 2,4,6-环庚三烯-1-酮(托品酮)衍生物的碳-碳键断裂反应。当使用Ni/N-杂环卡宾催化剂时,脱羰作用会随着苯环的形成而进行,而使用二齿配体与醇添加剂结合会导致双碳环收缩,并生成环戊二烯衍生物。后一个反应涉及镍-乙烯酮络合物作为中间体,并通过 X 射线晶体学对其进行了表征。选择合适的配体可以通过七元碳环骨架的裂解选择性合成四种不同的产物。还通过计算研究了两种类型的环收缩反应的反应机制和配体控制的选择性。
Synthesis, Structure, and Photophysical Properties of Highly Substituted 8,8a-Dihydrocyclopenta[<i>a</i>]indenes
作者:Yao-Ting Wu、Ming-Yu Kuo、Yu-Ting Chang、Chien-Chueh Shin、Tsun-Cheng Wu、Chia-Cheng Tai、Tzu-Heng Cheng、Wei-Szu Liu