- A simple route to derivatives of benzo[j]fluoranthene
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3,6,8,11-Tetramethoxybenzo[j]fluoranthene can be made from 1,6-dimethoxynaphthalene in a one-pot ferric chloride oxidation/methanol reduction procedure. The reaction is tolerant of the presence of substituents in the 7-position of the naphthalene nucleus and provides a quick and easy route to these particular benzo[j]fluoranthenes. The reactions presumably proceed through initial formation of a bond between the 4-positions of two naphthalene molecules followed by closure of the five-membered ring. Indeed in one case some 4,4′-binaphthyl was isolated from the reaction mixture and it was generally found that better yields of the benzo[j]fluoranthrenes were obtained starting from the 4,4′-binaphthyl rather than by using the naphthalene as the starting material. In an analogous manner to the ring-closure of the 4,4′-binaphthyls, starting from a hexakisalkoxyphenylnaphthalene, a hexakisalkoxyfluoranthene could be obtained.
- Tate, Daniel J.,Abdelbasit, Mohamed,Kilner, Colin A.,Shepherd, Helena J.,Warriner, Stuart L.,Bushby, Richard J.
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- Synthesis of highly substituted hexahelicenes
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C2-Symmetric hexahelicenes 3a-3g, which bear four or six alkoxy chains, were prepared in eight-to-nine reaction steps in high overall yields. The final step consisted of a twofold oxidative photocyclization of the corresponding 2,7-bis(2-phenylethenyl)naphthalenes. Long (and branched) chains provide a good solubility and processability, which is a prerequisite for applications in organic synthesis and materials science.
- Schwertel, Manfred,Hillmann, Sabine,Meier, Herbert
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- MULTICYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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The present specification provides a compound of chemical formula 1 and an organic light emitting device comprising the same. The compound described in the present specification can be used as a material of an organic material layer of the organic light emitting device. When manufacturing the organic light emitting device comprising the compound according to at least one embodiment, it is possible to obtain the organic light emitting device having high efficiency and long lifespan.COPYRIGHT KIPO 2020
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Paragraph 0313-0317
(2019/12/25)
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- MULTICYCLIC COMPOUND AND ORGANIC LIGHT EMITTING DEVICE COMPRISING THE SAME
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The present specification provides a compound of chemical formula 1 and an organic light emitting device comprising the same. The compound described in the present invention can be used as a material of an organic material layer of the organic light emitting device. When the compound of the present invention is included in a light emitting layer of the organic light emitting device, it is possible to manufacture the organic light emitting device having a high color reproducibility.COPYRIGHT KIPO 2020
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Paragraph 0319-0323
(2019/12/25)
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- Intramolecular cascade hydroarylation/cycloisomerization strategy for the synthesis of polycyclic aromatic and heteroaromatic systems
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A new PtCl2/PtCl4-catalyzed hydroarylation/ cycloisomerization cascade reaction leading to the formation of two aromatic or heteroaromatic rings in one step is reported. The strategy developed is exemplified by the synthesis of the 5
- Storch, Jan,Bernard, Martin,Sykora, Jan,Karban, Jindrich,Cermak, Jan
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supporting information
p. 260 - 263
(2013/02/25)
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