34244-15-0Relevant articles and documents
Sterically driven metal-free oxidation of 2,7-di-tert-butylpyrene
Cesario, Marcello F.,El-Assaad, Tarek H.,McGrath, Dominic V.,Parida, Keshaba N.
supporting information, p. 5966 - 5971 (2020/10/18)
We disclose an unprecedented single-step metal-free green oxidation of 2,7-di-tert-butylpyrene selectively into either the corresponding 4,5-dione or 4,5,9,10-tetraone, two key building blocks used for organic optoelectronic applications using hypervalent
A palladium-catalyzed domino reaction as key step for the synthesis of functionalized aromatic amino acids
Stark, Tina,Suhartono, Marcel,G?bel, Michael W.,Lautens, Mark
supporting information, p. 2730 - 2734 (2014/01/06)
A variety of substituted aromatic systems are synthesized by the Catellani reaction. These are used as precursors for novel amino acids with a basic side chain. Georg Thieme Verlag Stuttgart New York.
Synthesis of C-2 arylated tryptophan amino acids and related compounds through palladium-catalyzed C-H Activation
Preciado, Sara,Mendive-Tapia, Lorena,Albericio, Fernando,Lavilla, Rodolfo
, p. 8129 - 8135 (2013/09/12)
Tryptophan (Trp) and tryptophan derivatives are C2-arylated. A C-H activation process allows the preparation of both protected and unprotected arylated-Trp amino acids, directly from the amino acid precursor and aryl iodides. The obtained compounds are suitable for standard solid-phase peptide synthesis.
Tripodal pyrene chromophores for semiconductor sensitization: new footprint design
Thyagarajan, Sujatha,Liu, Aiping,Famoyin, Olumide A.,Lamberto, Massimiliano,Galoppini, Elena
, p. 7550 - 7559 (2008/02/07)
Large footprint tripodal linkers for metal oxide nanoparticle sensitization, substituted with pyrene as the dye, and three COOR binding groups in para or meta position, were prepared to study the effect of the anchoring group position and of the footprint size on the sensitization processes. Two tripods based on tetraphenylsilane, (1-pyrenyl-4-ethynyl-phenyl)-tris(4-carbomethoxyphenyl-4-ethynyl-phenyl)silane, and (1-pyrenyl-4-ethynyl-phenyl)-tris(4-(4-methoxybenzyloxycarbonyl)phenyl-4-ethynyl-phenyl)silane, decomposed during hydrolysis, while the tetraphenyladamantane derivative, 1-(1-pyrenyl-4-ethynyl-phenyl)-3,5,7-(3-carbomethoxyphenyl-4-ethynyl-phenyl)adamantane, was chemically stable and was readily converted into the corresponding acid and bound to TiO2 films. The FT-IR-ATR spectrum of 1-(1-pyrenyl-p-ethynyl-phenyl)-3,5,7-(3-carboxyphenyl-4-ethynyl-phenyl)adamantane bound to TiO2 nanoparticles showed bands characteristic of carboxylate bidentate bonds. The UV-vis absorption and fluorescence emission in THF solution at room temperature were typical of pyrenes substituted with oligophenyleneethynylene linkers.
Pyrene-fused porphyrins: Annulation reactions of meso-pyrenylporphyrins
Yamane, Osamu,Sugiura, Ken-Ichi,Miyasaka, Hitoshi,Nakamura, Kazuya,Fujimoto, Tatsuhiko,Nakamura, Kazuki,Kaneda, Takahiro,Sakata, Yoshiteru,Yamashita, Masahiro
, p. 40 - 41 (2007/10/03)
We prepared novel pyrene-fused porphyrins via the oxidative intramolecular ring closure reactions of meso-pyrenylporphyrin. The excitation energies and the oxidation potentials of the isolated dark-colored pyrene-fused porphyrins were significantly low compared with those of the corresponding precursors.
Iodine Cyanide Promoted Iodination of Aromatic Compounds. A Simple Synthesis of 1-Iodopyrene
Radner, Finn
, p. 481 - 484 (2007/10/02)
A simple method for the iodination of reactive aromatic compounds, using ICN in the presence of a Lewis acid as the source of iodine, is presented. 1-Iodopyrene is obtained in 81percent isolated yield from the reaction of pyrene and ICN with AlCl3 in CH3NO2/(C2H5)2O.Anthracene undergoes partial chlorination in the presence of AlCl3, but with BF3, 9-iodoanthracene is obtained in 48percent isolated yield.
Lower Nitrogen Oxide Species as Catalysts in a Convenient Procedure for the Iodination of Aromatic Compounds
Radner, Finn
, p. 3548 - 3553 (2007/10/02)
A simple method for the iodination of aromatic compounds, using I- as the iodine source and the O2 and catalytic amounts of NO+BF4- as the oxidant, is presented.The reactions are performed at 25 deg C in CF3COOH/CH2Cl2 or CF3COOH/CH3COOH mixtures and compounds with as different reactivities as the halobenzenes and 1-methoxynaphthalene can be iodinated in very good yields.A set of relative rates, isotope effects, and isomer distributions in accordance with the electrophilic action of an "I+" species are presented.The formation of "I+" is discussed in terms of possible outer-sphere and inner-sphere electron-transfer steps.Aromatic bromination and to a lesser extent chlorination can be performed by using similar methods.
An Alternative Synthetic Method for Polycyclic Aromatic Iodides
Suzuki, Hitomi,Kondo, Akiko,Inouye, Masahiko,Ogawa, Takuji
, p. 121 - 122 (2007/10/02)
Polycyclic aromatic iodides 2 and 4 are prepared from readily available bromides 1 and 3 via the cooper(I)iodide-mediated halogen exchange with iodide ion in hot hexamethylphosphoric triamide.
