磷光Pt( II )配合物由于其高光致发光量子效率(PLQE)、可调的发射颜色、较大的斯托克斯位移和高电化学稳定性而引起了广泛的关注。然而,在薄膜和固态中,平面 Pt( II ) 配合物之间由于靠近而发生 Pt-Pt 相互作用,从而导致不希望的光谱变化。在这里,我们通过引入具有大空间位阻的甲基取代基乙酰丙酮作为辅助配体合成了三种新型Pt( II )配合物。空间位阻和精确配体排列的策略性包容有效克服了 Pt-Pt 相互作用。这种量身定制的设计方法可确保固体或薄膜和溶液中的光致发光光谱几乎相同,同时固体或薄膜中的 PLQE 显着增强,接近 100%。此外,利用其中一种Pt( II )配合物作为非掺杂和掺杂器件中的发射极,分别实现了19.6%和25.2%的出色最大外量子效率。我们的研究推进了对具有大空间位阻配体的Pt( II ) 配合物的探索,突出了它们作为电致发光器件中发射体的广阔潜力。
Catalyst/ligand-free synthesis of benzimidazoles and quinazolinones from amidines via intramolecular transamination reaction
摘要:
An efficient catalyst/ligand-free synthesis of benzimidazoles and quinazolinones from amidines in quailtitative yields has been described. (C) 2010 Elsevier Ltd. All rights reserved.
Indium-mediated one-pot benzimidazole synthesis from 2-nitroanilines or 1,2-dinitroarenes with orthoesters
作者:Jaeho Kim、Jihye Kim、Hyunseung Lee、Byung Min Lee、Byeong Hyo Kim
DOI:10.1016/j.tet.2011.08.017
日期:2011.10
One-pot reduction-triggered heterocyclizations from 2-nitroanilines or 1,2-dinitroarenes to benzimidazoles were investigated in this study. In the presence of indium/AcOH in ethyl acetate at reflux, reaction of 2-nitroanilines or 1,2-dinitroarenes with R–C(OMe)3 (R=Me, Ph) produced excellent yields of the corresponding benzimidazoles within 30 min to 6 h depending on the substituents of the starting
The iron-catalyzed heterocyclizations from 2-nitroanilines and benzylic alcohols to form benzimidazoles using hydrogen transfer reaction were investigated in this study. In the presence of dppf in toluene at 150 °C, various benzimidazoles were obtained in moderate to good yields within 24 h. The reaction was proposed to proceed via a cascade of alcohol oxidation, nitro reduction, condensation, and
A one-pot synthesis of benzimidazoles via aerobic oxidative condensation of benzyl alcohols with <i>o</i>-phenylenediamines catalyzed by [MIMPs]<sup>+</sup>Cl<sup>-</sup>/NaNO<sub>2</sub>/TEMPO
in combination with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and sodium nitrite (NaNO2) as a catalytic system demonstrates high efficiency in the one-pot two-step aerobic oxidative condensation of benzylalcohols with 1,2-phenylenediamines to give benzimidazoles. Various benzimidazoles are obtained in good to excellent yields by this strategy.
An efficientapproach to the synthesis of benzimidazole derivatives has been achieved by copper-catalyzed double C–N bonds formation of N-alkyl-2-iodoaniline and sodium azide. The reaction was supposed to proceed throughcopper-catalyzed tandem reaction of SNAr reaction, aerobic oxidation of C(sp3)–H bond and intramolecular C–N bond formation sequence. Structurally diverse 2-aryl, alkenyl and alkyl
[EN] COMPOSITIONS AND METHODS FOR BLOCKING SODIUM CHANNELS<br/>[FR] COMPOSITIONS ET PROCÉDÉS DE BLOCAGE DE CANAUX SODIQUES
申请人:PATEL MANOJ K
公开号:WO2018140504A1
公开(公告)日:2018-08-02
The disclosure provides methods for treating a subject suffering from a disease associated with sodium channel activity. The method comprises administering to the subject a therapeutically effective amount of a compound according to Formula II or Formula III described in the specification, or a pharmaceutically acceptable salt, prodrug, tautomer, stereoisomer, hydrate, or solvate thereof.