- Nitrogen-containing compounds, electronic components and electronic devices
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The present application relates to the field of organic electroluminescent material technology, providing a nitrogen-containing compound, electronic components and electronic devices. The structure of the nitrogen-containing compound is shown in formula 1, wherein X1 and X2 are each independently selected from O or S; R1 and R2 are each independently selected from the structure shown in hydrogen or formula 2, and R1 and R2 have and only one structure shown in formula 2. The nitrogen-containing compound can improve the performance of electronic components.
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Paragraph 0161-0168; 0174
(2022/04/06)
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- Stannylation of Aryl Halides, Stille Cross-Coupling, and One-Pot, Two-Step Stannylation/Stille Cross-Coupling Reactions under Solvent-Free Conditions
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Solvent-free protocols for palladium-catalyzed stannylation of aryl halides, Stille cross-coupling, and one-pot, two-step stannylation/Stille cross-coupling (SSC) are reported for the first time. (Het)aryl halides bearing acceptor, donor, as well as sterically demanding substituents are stannylated and/or coupled in high yields. The reactions are catalyzed by conventional palladium(II) acetate/PCy3 [Pd(OAc)2/PCy3] under air, using available base CsF, and without the use of high purity reagents. The developed synthetic procedures are versatile, robust, and easily scalable. The absence of solvent, and the elimination of isolation procedures of aryl stannanes makes the SSC protocol simple, step economical, and highly efficient for the synthesis of biaryls in a one-pot two-step procedure.
- Gribanov, Pavel S.,Golenko, Yulia D.,Topchiy, Maxim A.,Minaeva, Lidiya I.,Asachenko, Andrey F.,Nechaev, Mikhail S.
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p. 120 - 125
(2018/01/17)
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- Substituted heterocyclic compound, and use method and use thereof
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The invention relates to a substituted heterocyclic compound, and a use method and a use thereof. The substituted heterocyclic compound and a medicinal composition including the compound can be used to depress orexin receptors, especially an orexin-1 rece
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Paragraph 0231; 0232; 0233; 0234; 0469; 0470; 0471; 04712
(2016/10/08)
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- Simple microwave-assisted ligand-free Suzuki cross-coupling: Functionalization of halo-pyrimidine moieties
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(Chemical Equation Presented) An advantageous ligand-free protocol for Suzuki couplings is described. The synthetic procedure entails microwave irradiation for the reduction of the reaction times and the use of silica cartridges for the purification. Dihalo-pyrimidine structures, interesting scaffolds in medicinal chemistry, were chosen as test compounds.
- Colombo, Matteo,Giglio, Marco,Peretto, Ilaria
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p. 1077 - 1081
(2008/12/20)
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- Synthesis and biological activities of novel β-carbolines as PDE5 inhibitors
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A series of N2-furoyl and N2pyrimidinyl β-carbolines was discovered to possess potent inhibitory activity against PDE5. During the synthesis we developed a tandem resin quenching protocol, which allowed us to synthesize large number
- Sui, Zhihua,Guan, Jihua,Macielag, Mark J.,Jiang, Weiqin,Qiu, Yuhong,Kraft, Patricia,Bhattacharjee, Sheela,John, T. Matthew,Craig, Elizabeth,Haynes-Johnson, Donna,Clancy, Joanna
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p. 761 - 765
(2007/10/03)
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- Electronic Effects of Aryl and Heteroaryl Groups on the Rate of Nucleophilic Displacement of Chlorine from 5-Heteroaryl(or Aryl)-2-chloropyrimidines by Piperidine
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The kinetics of nucleophilic displacement of chlorine from a series of 2-chloro-5-heteroaryl(or aryl)pyrimidines by piperidine have been studied in order to assess the electronic effects of the 5-substituent.The observed order of reactivity is 5-(1-methyl
- Allen, David W.,Buckland, David J.,Hutley, Barrie G.
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p. 463 - 467
(2007/10/02)
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