4269-17-4Relevant articles and documents
Synthesis of Cyclopenta-HBCs and their Regioselective Chlorination During Oxidative Cyclodehydrogenation
Hall, Thomas B. J.,Hoggard, Bryce R.,Larsen, Christopher B.,Lucas, Nigel T.
, p. 1106 - 1110 (2019)
Hexa-peri-hexabenzocoronenes with a bay-fused five-membered ring are synthesized from fluorenyl precursors. The key oxidative cyclodehydrogenation step is accompanied by regioselective chlorination that is enhanced by methylation at the cyclopenta-ring or increased reaction concentration. The CpHBC products undergo mild electrophilic aromatic bromination, without catalyst, to afford adducts suitable for π-extension by cross-coupling.
Hole transport material and organic electroluminescent device containing same
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Paragraph 0057; 0060-0061; 0094; 0097-0098; 0197; 0200-0201, (2021/02/24)
The invention discloses a hole transport material and an organic electroluminescent device containing the same, and relates to the field of organic electroluminescent materials, wherein the structuralformula is shown in the specification. According to the invention, compared with a control example, the organic electroluminescent device prepared from the hole transport material has the advantagesthat the voltage is greatly reduced, and the light-emitting efficiency is remarkably improved, so that the compound provided by the invention can greatly reduce the driving voltage of the device, greatly reduces the consumption of electric energy, and remarkably improves the luminous efficiency; and by reducing the driving voltage, the service life of the organic electroluminescent device is remarkably prolonged.
Intermediate 5 - bromine yinyin alkone preparation method (by machine translation)
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Paragraph 0008; 0010-0029, (2019/04/17)
The invention discloses an intermediate 5 - bromine yinyin alkone synthetic method, bromobenzene, dichloromethane, 3 - [...], concentrated hydrochloric acid, NaOH, 1 - tert-butyl 3 - methyl imidazole pressure concentrated water, double-(trifluoromethyl sulfonyl) imide as a main raw material, the process of the invention using the composite catalyst to avoid the corrosion of the equipment, the reaction conditions are easy to control, the yield is high, the product is easy to purification, and the reaction of the raw material 3 - chloropropionyl cheap and bromobenzene. To sum up, the preparation process have very good economic benefits can be the large-scale production. (by machine translation)
Aromatic amine compound containing 9,9'-spirobifluorene and dibenzothiophene and organic electroluminescent device thereof
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Paragraph 0059; 0063; 0064, (2018/11/03)
The invention provides an aromatic amine compound containing 9,9'-spirobifluorene and dibenzothiophene and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The compound has a simple preparation method, easily available raw materials, good hole transport capability and stability, can realize charge balance in a light-emitting layer, has a suitable highest occupied molecular orbital energy level, a high T1 value and a high refractive index, can remarkably improve the light emitting efficiency, the heat resistance and the servicelife of the device when applied to an OLED device, and can also effectively reduce the driving voltage of the device, thereby being an OLED material with excellent performance.
A containing 9, 9' - fluorene and dibenzofuran aromatic amine compound and its organic electroluminescent device (by machine translation)
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Paragraph 0060; 0064; 0065, (2018/11/04)
The present invention provides a containing 9, 9' - fluorene and dibenzofuran aromatic amine compound and its organic electroluminescent light emitting device, relates to organic photoelectric material technical field. The compound preparation method is simple, easily available raw materials, has suitable the highest occupied molecular orbital energy level, high T1 value and high refractive index, and have very good hole transporting capability, thermal stability and film-forming properties, is applied to the OLED devices, can significantly improve the luminous efficiency of the device, heat resistance and service life, also can effectively reduce the driving voltage of the device. (by machine translation)
COMPOUND, COMPOSITION AND ORGANIC LIGHT-EMITTING DEVICE
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, (2017/09/15)
A compound of formula (I) or (III) (Formulae (I), (III)) wherein: one Y is a substituent R1 bound directly to the fluorene unit of formula (I) by an sp3-hybridised carbon atom; the other Y is an aryl or heteroaryl group Ar1 that may be unsubstituted or substituted with one or more substituents; Ar2 is an arylene or heteroarylene group; R2 is a substituent; b is 0, 1, 2, 3 or 4; c is 0, 1, 2 or 3; and X is a group of formula (II): (Formula (II)) wherein Z is O or S; R3 independently in each occurrence is a substituent; each x is independently 0, 1, 2 or 3; and * is a bond to the fluorene unit of formula (I).The compounds may be used as host materials for phosphorescent dopants in organic light-emitting devices.
Production method for 4-bromo fluorenone
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Paragraph 0006; 0016, (2016/10/31)
The invention discloses a production method for 4-bromo fluorenone, belonging to the field of organic chemical synthesis. The production method is realized by comprising the following steps: reacting cyanobenzene as a raw material with o-dibromobenzene under the protection of argon gas and the actions of a palladium catalyst, a copper catalyst and an organic phosphine ligand so as to obtain 2-bromo-2'-carbonitrile biphenyl, and carrying out hydrolyzation and closed-loop synthesizing so as to obtain the 4-bromo fluorenone. The production method for the 4-bromo fluorenone is simple to operate in reaction process, has low production cost and is suitable for industrial production. The 4-bromo fluorenone can be applied in the fields of organic optoelectronic materials, medicines, pesticides, etc.
Atropo-diastereoselective coupling of aryllithiums and arynes — variations around the chiral auxiliary
Augros, David,Yalcouye, Boubacar,Berthelot-Bréhier, Ana?s,Chessé, Matthieu,Choppin, Sabine,Panossian, Armen,Leroux, Frédéric R.
, p. 5208 - 5220 (2016/08/02)
The atropo-selective coupling of in situ generated arynes and aryllithiums bearing various chiral auxiliaries ortho to lithium (tert-butylsulfoxide, para-tolylsulfoxide, tartrate-derived chiral diethers and oxazolines) is described. Chiral oxazolines showed the best results in terms of yields of coupling products. Different reaction parameters like the nature of the aryne precursor, the oxazoline, the alkyllithium base or the solvent revealed to be crucial for obtaining good yields and for diastereoselection.
Access to Atropisomerically En-riched Biaryls by the Coupling of Aryllithiums with Arynes under Control by Homochiral Oxazolines
Yalcouye, Boubacar,Berthelot-Bréhier, Ana?s,Augros, David,Panossian, Armen,Choppin, Sabine,Chessé, Matthieu,Colobert, Fran?oise,Leroux, Frédéric R.
supporting information, p. 725 - 732 (2017/01/18)
We report the preparation of axially stereoenriched biphenyls by the coupling of in situ generated aryllithiums and arynes using chiral oxazoline auxiliaries. The design of the aryne precursors, the choice of oxazoline and the reaction conditions were key to accessing the desired, highly substituted, atropisomerically enriched biarylic products. In one case, the two atropo-diastereomers could be obtained in isomerically pure form by column chromatographic separation and their absolute configurations established by X-ray crystallography. The stereoselectivity of the reaction seems to be governed by subtle parameters.
RhI-Catalyzed Intramolecular Carbonylative C?H/C?I Coupling of 2-Iodobiphenyls Using Furfural as a Carbonyl Source
Furusawa, Takuma,Morimoto, Tsumoru,Nishiyama, Yasuhiro,Tanimoto, Hiroki,Kakiuchi, Kiyomi
supporting information, p. 2312 - 2315 (2016/08/30)
Synthesis of fluoren-9-ones by a Rh-catalyzed intramolecular C?H/C?I carbonylative coupling of 2-iodobiphenyls using furfural as a carbonyl source is presented. The findings indicate that the rate-determining step is not a C?H bond cleavage but, rather, the oxidative addition of the C?I bond to a RhI center.
