52341-51-2Relevant academic research and scientific papers
A simple and broadly applicable synthesis of fluorene-coupled D-σ-A type molecules: towards high-triplet-energy bipolar hosts for efficient blue thermally-activated delayed fluorescence
Li, Chuan,Du, Xiaoyang,Zhou, Yu,Ye, Jun,Fu, Lulu,Humphrey, Mark G.,Wu, Chao,Zhao, Juewen,Du, Yanqing,Tao, Silu,Wu, Jiacheng,Zhang, Chi
, p. 6949 - 6957 (2018)
An effective two-step synthesis of high-triplet-energy (ET) bipolar hosts that is simple and broadly applicable is introduced. Electron-donating (D = (9-phenyl-9H-carbazol-3-yl/4-(9H-carbazol-9-yl)phenyl)) and -accepting (A = (tetrafluoropyridin-4-yl/4,6-diphenyl-1,3,5-triazin-2-yl)) units have been coupled to the C9 atom of fluorene to afford the four hosts 3CzFTFP, 9PhFTFP, 3CzFDPhTz, and 9PhFDPhTz with sp3 C9-centered bulky ternary structures, excellent thermal/morphological stabilities, tunable abilities for bipolar charge carrier injection/transport, and identical high ET (2.87 eV). Blue thermally-activated delayed fluorescence (TADF) devices using these new hosts and 2CzPN as the host-guest system exhibited efficient electroluminescence efficiencies of 38 cd A-1/30 lm W-1/17%, which are among the best for 2CzPN-based TADF devices. The generality of this synthetic strategy to high-ET fluorene-coupled D-σ-A type hosts was confirmed by successfully appending other D/A groups ((diphenylamino)phenyl/phenylsulfonyl) to fluorene, affording TPAFBSO.
Synthesis of 9-biarylfluorenes by one-pot, three-step reactions of N-tosylhydrazones, p-bromobenzeneboronic acid, and arylboronic acids
He, Jing,Zhang, Jie,Dai, Bin,Liu, Ping
, p. 268 - 273 (2019/07/15)
A one-pot, three-step reaction of N-tosylhydrazones, p-bromobenzeneboronic acid, and arylboronic acids is established for the synthesis of 9-biarylfluorenes. Sequential formation of Csp3–Csp2 bond and Csp2–Csp2
Lewis Acid Catalyzed [4 + 2] Cycloaddition of N-Tosylhydrazones with ortho-Quinone Methides
Wang, Chun-Ying,Han, Jia-Bin,Wang, Long,Tang, Xiang-Ying
, p. 14258 - 14269 (2019/11/11)
A formal [4 + 2] cycloaddition of N-tosylhydrazones with ortho-quinone methides was developed, affording the facile synthesis of diverse 1,3-oxazine derivatives under mild conditions. In this transformation, N-tosylhydrazones are used as a 1,2-dipole synt
Organic electro-luminescent material and organic light emitting device thereof
-
Paragraph 0070; 0071; 0072, (2018/04/03)
The invention provides an organic electro-luminescent material and an organic light emitting device thereof, relating to the technical field of organic photoelectric materials. The organic electro-luminescent material contains fluorene that is different f
Directed C-C bond cleavage of a cyclopropane intermediate generated from: N -tosylhydrazones and stable enaminones: Expedient synthesis of functionalized 1,4-ketoaldehydes
Ni, Meiyan,Zhang, Jianguo,Liang, Xiaoyu,Jiang, Yaojia,Loh, Teck-Peng
supporting information, p. 12286 - 12289 (2017/11/20)
An efficient method to construct functionalized 1,4-ketoaldehydes bearing all-carbon α-quaternary centers via regioselective C-C bond activation has been described. The cyclopropanation of bench-stable enaminones with in situ generated diazo reagents from
Copper(I)-Catalyzed Alkylation of Polyfluoroarenes through Direct C - H Bond Functionalization
Xu, Shuai,Wu, Guojiao,Ye, Fei,Wang, Xi,Li, Huan,Zhao, Xia,Zhang, Yan,Wang, Jianbo
supporting information, p. 4669 - 4672 (2015/04/14)
The copper(I)-catalyzed alkylation of electron-deficient polyfluoroarenes with N-tosylhydrazones and diazo compounds has been developed. This reaction uses readily available starting materials and is operationally simple, thus representing a practical method for the construction of C(sp2) - C(sp3) bonds with polyfluoroarenes through direct C - H bond functionalization. Mechanistically, copper(I) carbene formation and subsequent migratory insertion are proposed as the key steps in the reaction pathway.
A simple and efficient synthesis of 9-arylfluorenes via metal-free reductive coupling of arylboronic acids and N-tosylhydrazones in situ
Shen, Xu,Gu, Ningning,Liu, Ping,Ma, Xiaowei,Xie, Jianwei,Liu, Yan,He, Lin,Dai, Bin
, p. 63726 - 63731 (2015/08/11)
A general, yet efficient synthesis method of 9-arylfluorenes via metal-free reductive coupling of N-tosylhydrazones and arylboronic acids has been developed. This methodology is realized by a one-pot protocol in two steps involving the preparation of N-tosylhydrazones by reacting tosylhydrazide with 9-fluorenone derivatives, followed by the reductive coupling of arylboronic acid in the presence of potassium carbonate to afford various 9-arylfluorenes analogues in moderate to excellent yields. Importantly, the catalytic system presented here enables the use of easily accessible starting materials and can be employed on a wide variety of substrates with good functional group tolerance. This protocol could also be particularly useful for the synthesis of 9-fluorenyl-substituted carbazolyl compounds.
N-Tosylhydrazine-mediated deoxygenative hydrogenation of aldehydes and ketones catalyzed by Pd/C
Zhou, Lei,Liu, Zhenxing,Liu, Yizhou,Zhang, Yan,Wang, Jianbo
, p. 6083 - 6087 (2013/07/25)
A mild and efficient method for the deoxygenative hydrogenation of aldehydes and ketones has been developed. The reaction is mediated by N-tosylhydrazine with H2 (1 atm) as the reductant and 10% Pd/C as the catalyst.
Copper-catalyzed nitrogen loss of sulfonylhydrazones: A reductive strategy for the synthesis of sulfones from carbonyl compounds
Feng, Xing-Wen,Wang, Jian,Zhang, Ji,Yang, Jing,Wang, Na,Yu, Xiao-Qi
supporting information; experimental part, p. 4408 - 4411 (2010/12/19)
Figure Presented. An efficient method for the synthesis of sulfones via nitrogen loss of sulfonyl hydrazones is described. The reaction was performed in the presence of simple copper salt and base by utilization of sulfonyl hydrazones, which were easily p
CATALYSTS FOR METATHESIS REACTIONS
-
Page/Page column 15, (2009/04/24)
Novel catalysts for metathesis reactions, in particular for the metathesis of nitrile rubber, are provided.
