58536-46-2Relevant academic research and scientific papers
Deep blue fluorescent material with a narrow FWHM based on indolo[3,2,1-jk]carbazol/pyrimidine hybrids
Hiraga, Yasuhide,Kuwahara, Rempei,Hatta, Taizo
, (2021/03/29)
A series of blue fluorescent materials containing electron accepting pyrimidine and electron donating bis(biphenyl)amine, diphenylcarbazole, and diphenylindolo[3,2,1-jk]carbazole moieties were synthesized in moderate yields, and their optical and electroc
Bioinspired Radical-Mediated Transition-Metal-Free Synthesis of N-Heterocycles under Visible Light
K. Bains, Amreen,Ankit, Yadav,Adhikari, Debashis
, p. 324 - 329 (2020/11/30)
A redox-active iminoquinone motif connected with π-delocalized pyrene core has been reported that can perform efficient two-electron oxidation of a class of substrates. The design of the molecule was inspired by the organic redox cofactor topaquinone (TPQ), which executes amine oxidation in the enzyme, copper amine oxidase. Easy oxidation of both primary and secondary alcohols happened in the presence of catalytic KOtBu, which could reduce the ligand backbone to its iminosemiquinonate form under photoinduced conditions. Moreover, this easy oxidation of alcohols under aerobic condition could be elegantly extended to multi-component, one-pot coupling for the synthesis of quinoline and pyrimidine. This organocatalytic approach is very mild (70 °C, 8 h) compared to a multitude of transition-metal catalysts that have been used to prepare these heterocycles. A detailed mechanistic study proves the intermediacy of the iminosemiquinonate-type radical and a critical hydrogen atom transfer step to be involved in the dehydrogenation reaction.
A strategy to construct multifunctional TADF materials for deep blue and high efficiency yellow fluorescent devices
Guo, Runda,Liu, Wei,Lv, Xialei,Sun, Shuaiqiang,Wang, Lei,Wang, Yaxiong,Ye, Shaofeng,Zhang, Qing
supporting information, p. 4818 - 4826 (2020/04/17)
Three deep blue thermally activated delayed fluorescence (TADF) molecules are designed by connecting three different sterically hindered electron-donating groups with 2,6-diphenylpyrimidine acceptors. The rigid structures based on carbazole derivatives en
Compound, photoelectric conversion device, and electronic device
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Paragraph 0120-0122, (2020/01/08)
The invention provides a compound shown as a formula I, a photoelectric conversion device and an electronic device, and belongs to the technical field of organic materials. The compound can reduce theworking voltage of the photoelectric conversion device, improve the luminous efficiency of the photoelectric conversion device and prolong the service life of the device.
Transition-metal-free selective pyrimidines and pyridines formation from aromatic ketones, aldehydes and ammonium salts
Chen, Jinjin,Meng, Huanxin,Zhang, Feng,Xiao, Fuhong,Deng, Guo-Jun
supporting information, p. 5201 - 5206 (2019/10/11)
An efficient synthesis of pyrimidines and pyridines has been developed from readily available aromatic ketones, aldehydes and ammonium salts under transition-metal-free conditions. In this strategy, ammonium salts were used as nitrogen sources and only wa
Direct synthesis of 2,4,5-trisubstituted imidazoles and di/tri-substituted pyrimidines via cycloadditions of α,β-unsaturated ketones/aldehydes and N′-hydroxyl imidamides
Wu, Ping,Zhang, Xueguo,Chen, Baohua
supporting information, p. 1103 - 1107 (2019/03/26)
An efficient route for the synthesis of 5-acetylimidazoles and di/trisubstituted pyrimidines via iron-catalyzed cross-dehydrogenative coupling (CDC), with excellent tolerance and yields, has been developed. In this report, α,β-unsaturated aldehydes/ketones and N′-hydroxyl imidamides undergo [3+2] and [3+3] cycloadditions in two processes, involving iron-mediated Michael reaction, Robinson Annulation and 1,5-electrocyclization.
Preparation method of 2,4,6-triaryl-substituted-pyrimidine compounds
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Paragraph 0072-0075, (2019/10/01)
The invention discloses a preparation method of 2,4,6-triaryl-substituted-pyrimidine compounds. The preparation method includes the following steps that aromatic aldehyde compounds shown in the formula (I), aromatic ketone compounds shown in the formula (
Acceptorless Dehydrogenative Synthesis of Pyrimidines from Alcohols and Amidines Catalyzed by Supported Platinum Nanoparticles
Sultana Poly, Sharmin,Siddiki, S. M. A. Hakim,Touchy, Abeda S.,Ting, Kah Wei,Toyao, Takashi,Maeno, Zen,Kanda, Yasuharu,Shimizu, Ken-Ichi
, p. 11330 - 11341 (2019/01/03)
A one-pot, acceptorless dehydrogenative method, using a carbon-supported Pt catalyst (Pt/C) along with KOtBu, has been developed for the synthesis of 2,4,6-trisubstituted pyrimidines from secondary and primary alcohols, and amidines. The reaction takes place efficiently using a wide range of substrate scopes (32 examples with isolated yields up to 92%). The Pt/C catalyst that promotes this process is reusable and has a higher turnover number (TON) than those employed in previously reported methods. The results of mechanistic studies suggest that the process takes place through a pathway that begins with Pt-catalyzed acceptorless dehydrogenation of the alcohol substrate, which is followed by sequential condensation, cyclization, and dehydrogenation. Measurements of the turnover frequency combined with the results of density functional theory calculations on different metal surfaces suggest that the adsorption energy of H on the Pt surface is optimal for the acceptorless dehydrogenation process, which causes the higher catalytic activity of Pt over those of other metals.
Copper-catalyzed three-component synthesis of pyrimidines from amidines and alcohols
Shi, Tianchao,Qin, Feng,Li, Qian,Zhang, Wu
supporting information, p. 9487 - 9491 (2019/01/03)
An efficient copper-catalyzed one-pot three-component reaction of amidines, primary alcohols and secondary alcohols has been developed to synthesize multisubstituted pyrimidines. The significant merits of this method involve high atom efficiency, good fun
Isomeric spiro-[acridine-9,9′-fluorene]-2,6-dipyridylpyrimidine based TADF emitters: Insights into photophysical behaviors and OLED performances
Ganesan, Paramaguru,Chen, Deng-Gao,Liao, Jia-Ling,Li, Wei-Cheng,Lai, Yi-Ning,Luo, DIan,Chang, Chih-Hao,Ko, Chang-Lun,Hung, Wen-Yi,Liu, Shun-Wei,Lee, Gene-Hsiang,Chou, Pi-Tai,Chi, Yun
supporting information, p. 10088 - 10100 (2018/10/15)
TADF molecules with a higher horizontal-dipole ratio have recently been realized to show a large conversion efficiency in organic light-emitting diodes (OLEDs) and hence great promise for their application in display and solid state lighting sources. The
