Chiral atropisomeric five-membered biheteroaromatic diphosphines: New ligands of the bibenzimidazole and biindole series
摘要:
Two new chiral atropisomeric biheteroaromatic diphosphines are described: 2,2'-bis(diphenylphosphino)-1,1'-bibenzimidazole (3a) and 3,3'-dimethyl-1,1'-bis(diphenylphosphino)-2,2'-biindole (4a) structural characterization is given and configurational stability at room temperature demonstrated. The oxidation potential was recognized as a good tool to evaluate the electronic availability of the phosphorus atom in the series of biheteroaromatic diphosphines. Its value increases parallel to the electronic demand of the heterocyclic system and also depends on the position of the diphenylphosphino group. (C) 1997 Elsevier Science S.A.
Hypervalent iodine(III): selective and efficient single-electron-transfer (SET) oxidizing agent
作者:Toshifumi Dohi、Motoki Ito、Nobutaka Yamaoka、Koji Morimoto、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1016/j.tet.2009.10.040
日期:2009.12
ethers, affording the corresponding aromatic cation radicals. Since then, hypervalent iodine(III) has been utilized as a selective and efficient SET oxidizingagent that enables a variety of direct C–H functionalizations of aromatic rings in electron-rich arenes under mild conditions. We have now extended the original method to work in a series of heteroaromatic compounds such as thiophenes, pyrroles,
Direct Synthesis of Bipyrroles Using Phenyliodine Bis(trifluoroacetate) with Bromotrimethylsilane
作者:Toshifumi Dohi、Koji Morimoto、Akinobu Maruyama、Yasuyuki Kita
DOI:10.1021/ol060333m
日期:2006.5.1
[reaction: see text] The hypervalent iodine(III) reagent, phenyliodinebis(trifluoroacetate) (PIFA), mediates the unprecedented, oxidative coupling reaction of pyrroles to give alpha-linked bipyrroles selectively in the presence of bromotrimethylsilane. This straightforward synthesis could provide 2,3'-bipyrrole by the choice of a N-substituent of pyrrole. Mechanistic consideration of the present reaction
COMPOUND INCLUDING NITROGEN AND ORGANIC ELECTROLUMINESCENCE DEVICE INCLUDING THE SAME
申请人:Samsung Display Co., Ltd.
公开号:EP3460863A1
公开(公告)日:2019-03-27
Provided are compounds including nitrogen, represented by Formula 1, and an organic electroluminescence device including the same. In Formula 1, A1 to A10 are each independently CR3 or N. The organic electroluminescence device includes a first electrode, a second electrode which is opposite to the first electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein the plurality of organic layers include an emission layer, and at least one organic layer among the organic layers includes the compound including nitrogen.
Compound including nitrogen and organic electroluminescence device including the same
申请人:Samsung Display Co., Ltd.
公开号:US11021484B2
公开(公告)日:2021-06-01
Provided are a compound including nitrogen, represented by Formula 1, and an organic electroluminescence device including the same. In Formula 1, A1 to A10 are each independently CR3 or N. The organic electroluminescence device may include a first electrode, a second electrode which is opposite to the first electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein the plurality of organic layers include an emission layer, and at least one organic layer among the organic layers includes the compound including nitrogen.