16400-51-4Relevant articles and documents
Host polymorphs and crystalline host-guest complexes of 3,3′-bis(9-hydroxy-9-fluorenyl)biphenyl
Skobridis, Konstantinos,Theodorou, Vassiliki,Seichter, Wilhelm,Weber, Edwin
, p. 3985 - 3995 (2013)
The diol host compound 2 featuring a structure with two 9-fluorenol moieties attached in 3,3′-position to a biphenyl core unit has been synthesized and is shown to form crystalline inclusion complexes with organic guest molecules. Aside from the single-crystal X-ray structures of unsolvated 2 in two polymorphous forms (2A, 2B), structures of five inclusion compounds with 1,4-dioxane (2a), DMSO (2b), diethylamine (2c), acetic acid (2d), and ethyl acetate (2e) are described and comparatively discussed in the interaction behavior including corresponding host compounds with different attachment mode of the biphenyl unit and the diphenylhydroxymethyl-substituted equivalent.
Novel electron-transfer oxidation of Lipshutz cuprates with 1,4-benzoquinones: An efficient homo-coupling reaction of aryl halides and its application to the construction of macrocyclic systems
Miyake, Yoshihiro,Wu, Mo,Rahman, M. Jalilur,Iyoda, Masahiko
, p. 411 - 413 (2005)
The electron transfer reaction from Lipshutz cuprates, which can be easily prepared from aryl bromides, to 1,4-benzoquinones was found to proceed smoothly, affording either the corresponding homo-coupling products, in modest to excellent yields, or macrocyclic products selectively.
Heterogenized gold(I), gold(III), and palladium(II) complexes for C-C bond reactions
Corma, Avelino,González-Arellano, Camino,Iglesias, Marta,Pérez-Ferreras, Susana,Sánchez, Félix
, p. 1771 - 1774 (2007)
Recycling of heterogenized gold(I), gold(III), and palladium(II) complexes could be achieved for Suzuki and Sonogashira cross-coupling reaction between iodo benzene and arylboronic acids or alkynes. Au(I) and Pd(II) afford selectively nonsymmetrical biaryl compounds, while gold(III) complexes can only catalyze the arylboronic or alkynes homocoupling. Recycling occurs without loss of the catalytic activity after several reaction cycles. Georg Thieme Verlag Stuttgart.
Diazcarbazole derivative, preparation method thereof, and application of diazcarbazole derivative as electroluminescent material
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Paragraph 0138; 0139; 0140, (2019/03/26)
The invention belongs to the technical field of organic photoelectric material application, and particularly relates to a diazcarbazole derivative with different relative positions of N atoms and an application of the diazcarbazole derivative as an electroluminescent material. Carbazole-like group diazcarbazole with an electron-deficient property is introduced, and a triplet state of the materialcan be realized and the molecular orbital energy level can be adjustable through bonding with different groups, so that efficient recombination of carriers in an organic electroluminescent device is achieved fundamentally, an efficient and energy-saving organic light emitting diode (OLED) device is obtained, and the diazcarbazole derivative can be widely applied to the field of organic electroluminescence. The structural general formula of the material is as shown in the formula I, wherein a same diazcarbazole (diazcarbazole with N positions of 1,8, 1,7, 1,6, 2,7, 2,6, 2,5, 3,6, 3,5, and 4,5)is taken as a core, the L group is a bridging group for bonding the diazlocarbazole, the L group is selected from aromatic groups or aromatic heterocyclic groups containing heteroatoms, m and n are the numbers of the diazicarbazole, and the sum of m and n is greater than or equal to 1.
A ligand free protocol using Cu(OAc)2@Mont K-10 as versatile reusable catalyst for efficient homocoupling of arylboronic acids for synthesis of symmetric biaryls
Rahman, Taskia,Borah, Geetika,Gogoi, Pradip K.
, p. 795 - 800 (2020/06/26)
Biaryls are an important class of organic compounds that occur in many natural products and they have a wide variety of applications in drugs, agrochemicals, dyes, semi-conductors, and asymmetric syntheses. A versatile, eco-friendly, recyclable, heterogeneous catalyst has been developed for the efficient synthesis of symmetric biaryls from aryl boronic acids. The developed protocol for homocoupling of aryl boronic acid to symmetric biaryls is based on copper acetate supported on acid activated Mont K-10 which is ligand free, mild, inexpensive and compatible with wide range of functional groups and exhibit excellent yields. The catalyst is characterised by FTIR, ESR, XRD, SEM-EDX, BET surface area measurement and the catalyst can be separated from the reaction mixture by simple centrifugation and reused upto five cycles without significant loss in activity.