7342-82-7Relevant academic research and scientific papers
Selective synthesis, structure and oxidation properties of isomeric 1,4-dithiins fused to two benzo[b]thiophenes
Yamamoto, Tatsuya,Ogawa, Satoshi,Sato, Ryu
, p. 7943 - 7946 (2004)
Two novel isomers of 1,4-dithiins fused to two benzo[b]thiophenes on both sides were obtained by selective synthetic methods via the corresponding sulfides. The crystal structures of two dithiins were determined by X-ray crystallographic analyses. Examination of oxidation properties of the dithiins showed interesting results by CV measurement. The ESR spectra of chemically oxidized dithiins indicated formation of stable radical cations.
A room-Temperature phosphorescent polymer film containing a molecular web based on one-dimensional chiral stacking of a simple luminophore
Yoshida, Kyohei,Kuwahara, Yutaka,Miyamoto, Koji,Nakashima, Seiya,Jintoku, Hirokuni,Takafuji, Makoto,Ihara, Hirotaka
, p. 5044 - 5047 (2017)
We propose a new approach for a totally organic, room-Temperature phosphorescent system with a lifetime on the order of milliseconds, which is achieved by promotion of the one-dimensional chiral stacking of a simple, small fluorophore in a solution state. The versatility of this system is highlighted by its good applicability to the fabrication of a phosphorescent polymer film. This paper demonstrates the first example of a room-Temperature phosphorescent polymer film prepared with our methodology.
Syntheses and properties of nine-ring-fused linear thienoacenes
Xiong, Yu,Qiao, Xiaolan,Wu, Hongzhuo,Huang, Qiuliu,Wu, Qinghe,Li, Jie,Gao, Xike,Li, Hongxiang
, p. 1138 - 1144 (2014)
π-Extended nine-ring-fused linear thienoacenes 1a-c with internal thieno[3,2-b;4,5-b′]dithiophene substructures were synthesized. Their optical and electrochemical properties were investigated. Thin-film transistor characteristics showed all compounds displayed high device reproducibility and nearly no dependence on substrate temperatures. The highest performance was observed for 1c-based devices with mobility up to 1.0 cm2/Vs and current on/off ratio of 107, whereas the maximum mobility was 0.5 cm2/Vs for 1b and 0.011 cm2/Vs for 1a.
Structure-property relationships of benzo[2,1-b:3,4-b']bis[1]benzothiophenes for organic field effect transistors
Zhang, Kai,Zhang, Ji,Huang, Lanqi,Zhang, Xiaoqin,Yu, Gui,Wong, Man Shing
, p. 2717 - 2721 (2018)
A series of novel benzo[2,1-b:3,4-b']bis[1]-benzothiophene (BBBT) derivatives with different side-chains were synthesized and characterized. And their mobility properties were evaluated based on their active layers in OFETs devices. By means of simple thermal annealing, the devices based on BBBT-4 and BBBT-6 exhibited typical p-type FETs behavior with average hole mobilities of 0.28 and 0.124 cm2 V?1 s?1, respectively. Furthermore, the structure-property relationships of these semiconductors were also investigated by XRD and AFM.
Benzothieno [3, 2-b] benzothiophene-like hole transport material and preparation method and application thereof
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Paragraph 0061-0064, (2021/06/26)
The invention discloses a benzothieno [3, 2-b] benzothiophene-like hole transport material as well as a preparation method and application thereof. According to the invention, a benzo five-membered ring [3, 2-b] benzo five-membered ring (BXBY)-based hole
Thermally activated delayed fluorescent deep blue light material and preparation method thereof with organic electroluminescent device
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Paragraph 0091-0095, (2022/01/08)
The present invention discloses a thermal activation delayed fluorescent deep blue light material and preparation method thereof and an organic electroluminescent device, the thermal activation delayed fluorescent deep blue light material having the follo
Flexible on-site halogenation paired with hydrogenation using halide electrolysis
Shang, Xiao,Liu, Xuan,Sun, Yujie
supporting information, p. 2037 - 2043 (2021/03/26)
Direct electrochemical halogenation has appeared as an appealing approach in synthesizing organic halides in which inexpensive inorganic halide sources are employed and electrical power is the sole driving force. However, the intrinsic characteristics of direct electrochemical halogenation limit its reaction scope. Herein, we report an on-site halogenation strategy utilizing halogen gas produced from halide electrolysis while the halogenation reaction takes place in a reactor spatially isolated from the electrochemical cell. Such a flexible approach is able to successfully halogenate substrates bearing oxidatively labile functionalities, which are challenging for direct electrochemical halogenation. In addition, low-polar organic solvents, redox-active metal catalysts, and variable temperature conditions, inconvenient for direct electrochemical reactions, could be readily employed for our on-site halogenation. Hence, a wide range of substrates including arenes, heteroarenes, alkenes, alkynes, and ketones all exhibit excellent halogenation yields. Moreover, the simultaneously generated H2at the cathode during halide electrolysis can also be utilized for on-site hydrogenation. Such a strategy of paired halogenation/hydrogenation maximizes the atom economy and energy efficiency of halide electrolysis. Taking advantage of the on-site production of halogen and H2gases using portable halide electrolysis but not being suffered from electrolyte separation and restricted reaction conditions, our approach of flexible halogenation coupled with hydrogenation enables green and scalable synthesis of organic halides and value-added products.
Unified Synthesis of Polycyclic Alkaloids by Complementary Carbonyl Activation**
Christmann, Mathias,He, Guoli,List, Benjamin
supporting information, p. 13591 - 13596 (2021/05/07)
A complementary dual carbonyl activation strategy for the synthesis of polycyclic alkaloids has been developed. Successful applications include the synthesis of tetracyclic alkaloids harmalanine and harmalacinine, pentacyclic indoloquinolizidine alkaloid nortetoyobyrine, and octacyclic β-carboline alkaloid peganumine A. The latter synthesis features a protecting-group-free assembly and an asymmetric disulfonimide-catalyzed cyclization. Furthermore, formal syntheses of hirsutine, deplancheine, 10-desbromoarborescidine A, and oxindole alkaloids rhynchophylline and isorhynchophylline have been achieved. Finally, a concise synthesis of berberine alkaloid ilicifoline B was completed.
Regio- and Stereoselective Cascade of β,γ-Unsaturated Ketones by Dipeptided Phosphonium Salt Catalysis: Stereospecific Construction of Dihydrofuro-Fused [2,3-b] Skeletons
Chen, Yayun,He, Jiajia,Jiang, Chunhui,Ren, Xiaoyu,Su, Zhishan,Wang, Tianli,Xiao, Kai,Zhang, Hongkui,Zhuang, Cheng
supporting information, p. 19860 - 19870 (2021/08/06)
Chiral (dihydro)furo-fused heterocycles are significant structural motifs in numerous natural products, functional materials and pharmaceuticals. Therefore, developing efficient methods for preparing compounds with these privileged scaffolds is an important endeavor in synthetic chemistry. Herein, we develop an effective, modular method by a dipeptide-phosphonium salt-catalyzed regio- and stereoselective cascade reaction of readily available linear β,γ-unsaturated ketones with aromatic alkenes, affording a wide variety of structurally fused heterocyclic molecules in high yields with excellent stereoselectivities. Moreover, mechanistic investigations revealed that the bifunctional phosphonium salt controlled the regio- and stereoselectivities of this cascade reaction, particularly proceeding through the initial ketone α-addition followed by O-participated substitution; and the multiple hydrogen-bonding interactions between Br?nsted acid moieties of catalyst and nitro group of aromatic alkene were crucial in asymmetric induction. Given the generality, versatility, and high efficiency of this method, we anticipate that it will have broad synthetic utilities.
Catalytic Asymmetric Dearomative 1,3-Dipolar Cycloaddition of 2-Nitrobenzothiophenes and Isatin-Derived Azomethine Ylides
Zhao, Jian-Qiang,Zhou, Shun,Yang, Lei,Du, Hong-Yan,You, Yong,Wang, Zhen-Hua,Zhou, Ming-Qiang,Yuan, Wei-Cheng
supporting information, p. 8600 - 8605 (2021/11/13)
An enantioselective dearomative 1,3-dipolar cycloaddition of 2-nitrobenzothiophenes and isatin-derived azomethine ylides with a bifunctional hydrogen-bonding thiourea catalyst was established, giving polyheterocyclic compounds in excellent results (up to 99% yield, >20:1 dr for all cases and up to 99% ee). The enantioselectivity could be reversed by the bifunctional hydrogen-bonding squaramide catalyst containing the same chiral source as in the thiourea catalyst. DFT calculations revealed the origin of the observed stereochemistry and the reversal of enantioselectivity.
