63506-58-1Relevant articles and documents
An aromatic heterocyclic compound and use thereof
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Paragraph 0098; 0101-0104, (2019/11/04)
The invention provides an aromatic heterocyclic compound. The compound is as shown in formula (1), wherein Y1 is an oxygen atom or a sulfur atom; Y2 is an oxygen atom, a sulfur atom, NR3 or CR1R2, wherein R1, R2 are respectively selected from one of a hydrogen atom, a methyl group, an ethyl group, a propyl group, a tert-butyl group and a phenyl group, and R3 is the hydrogen atom or the phenyl group; X11-X20 are respectively selected from a nitrogen atom or CR4, and at least one of the X11-X20 is a carbon atom which is linked to L1 through a single bond, wherein R4 is the hydrogen atom, a halogen atom or a cyano group; at least one of the X17-X20 is the nitrogen atom. According to the aromatic heterocyclic compound, the aromatic heterocyclic compound has a similar structure as a dibenzofuran derivative and a dibenzothiophene derivative, electron transport can be improved, high light, low voltage, high efficiency and long service life of an organic EL component can be achieved, and the aromatic heterocyclic compound can be extensively applied in an OLED luminescent device and a display device to be used as the host material of a luminescent layer.
A reusable heterogeneous catalyst without leaking palladium for highly-efficient Suzuki-Miyaura reaction in pure water under air
Cai, Qi,Liang, Gaosheng,Xu, Yufang,Qian, Xuhong,Zhu, Weiping
, p. 60996 - 61000 (2016/07/12)
Herein, we report a heterogenous catalyst (Pd@FSM) by immobilization of a novel Pd2+ sensor as promoter over mesoporous silica. Pd@FSM with a high palladium loading of ca. 11 mg g-1 exhibited superior catalytic activity for Suzuki-Miyaura cross-couplings and a catalyst loading of 0.05 mol% is typically sufficient to achieve excellent reaction yields. Notably, the reaction is typically carried out in water without removing atmospheric oxygen. The catalyst is conveniently recycled and remains highly active even after being recycled 5 times. During this process, loss of palladium from the solid support of the catalyst is negligible. Furthermore, the catalyst can be stored in air for at least three months without loss of its catalytic activity. This work provides a new approach to developing heterogeneous palladium catalysts by combing materials and fluorescent sensors.
A facile synthesis of dibenzopyrroloazepinones as tetracyclic allocolchicinoids - An unusual 1,2-phenyl shift
Wu, Liang,Aliev, Abil E.,Caddick, Stephen,Fitzmaurice, Richard J.,Tocher, Derek A.,King, Frank D.
supporting information; experimental part, p. 318 - 320 (2010/05/01)
A facile synthesis of dibenzopyrroloazepinones via an electrophilic cyclisation of a biphenyl-acyliminium ion is described; an unusual 1,2-phenyl shift occurs when the C-1′ carbon is the more nucleophilic than the C-2′ carbon.