Nickel-Catalyzed Cyanation of Aryl Halides and Hydrocyanation of Alkynes via C–CN Bond Cleavage and Cyano Transfer
作者:Hui Chen、Shuhao Sun、Yahu A. Liu、Xuebin Liao
DOI:10.1021/acscatal.9b04586
日期:2020.1.17
methods to prepare aryl nitriles and vinyl nitriles from arylhalides and alkynes, respectively. Using inexpensive and non-toxic 4-cyanopyridine N-oxide as the cyano shuttle, the methods provide an efficient approach to prepare aryl cyanides and vinyl nitriles under mild and operationally simple reaction conditions with a broad range of functional group tolerance. In hydrocyanation of alkynes, the method
HETEROCYCLIC COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE SAME
申请人:Samsung Display Co., Ltd.
公开号:US20190051841A1
公开(公告)日:2019-02-14
An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer comprises an emission layer and a heterocyclic compound of Formula 1:
wherein a1 to a3 satisfy a1+a2+a3≥1.
The present invention relates to fluorescent diketopyrrolopyrroles of the formula (I), or (III), a process for their preparation and their use for the preparation of inks, colorants, pigmented plastics for coatings, non-impact-printing material, color filters, cosmetics, polymeric ink particles, toners, as fluorescent tracers, in color changing media, in solid dye lasers, EL lasers and electroluminescent devices. A luminescent device comprising a compound, or composition according to the present invention is high in the efficiency of electrical energy utilization and high in luminance.
The present invention relates to fluorescent diketopyrrolopyrroles of the formula (I), or (III), a process for their preparation and their use for the preparation of inks, colorants, pigmented plastics for coatings, non-impact-printing material, color filters, cosmetics, polymeric ink particles, toners, as fluorescent tracers, in color changing media, in solid dye lasers, EL lasers and electroluminescent devices. A luminescent device comprising a compound, or composition according to the present invention is high in the efficiency of electrical energy utilisation and high in luminance.
A light-promoted Ni-catalyzed cyanation of arylhalides employing 1,4-dicyanobenzene as a cyanating agent is reported. A broad array of aryl bromides, chlorides, and druglike molecules could be converted into their corresponding nitriles (65 examples). Mechanistic studies suggest that upon irradiation, the oxidative addition product Ni(II)(dtbbpy)(p-C6H4CN)(CN) undergoes homolytic cleavage of the Ni–aryl
报道了使用 1,4-二氰基苯作为氰化剂的光促进 Ni 催化的芳基卤化物氰化反应。广泛的芳基溴化物、氯化物和药物样分子可以转化为相应的腈(65 个例子)。机理研究表明,在辐照下,氧化加成产物 Ni(II)(dtbbpy)( p -C 6 H 4 CN)(CN) 发生 Ni-芳基键均裂,生成芳基自由基和 Ni(I) -CN 物质,后者引发随后的氰化反应。