已经致力于开发高效的蓝色发光材料。但是,深蓝色荧光材料可以满足国家电视系统委员会(NTSC)标准蓝色的国际照明委员会(CIE)坐标(0.14,0.08)的要求,并且具有很高的外部量子效率(EQE) )超过5%的商品,仍然稀缺。在此,据报道,带有三苯胺的2-(2'-羟基苯基)恶唑(3a-3c)的异常发光特性及其在有机发光二极管(OLED)中的应用是高效的深蓝色发光体。在3A基于设备的器件具有很高的光谱稳定性和出色的色纯度,半峰全宽只有53 nm,CIE坐标为(0.15,0.08),全宽狭窄,非常接近NTSC标准蓝色。器件的激子利用率接近100%,超过了传统荧光OLED中25%的理论极限。实验数据和理论计算表明3a具有高度杂化的局部和电荷转移激发态特征。在OLED中,3a的最大亮度为9054 cd m -2且EQE高达7.1%,这是基于2-(2'-羟基苯基)唑的唯一烯醇形式发射的高效蓝色OLED的第一个示例。
To expand the toolbox for the synthesis of ortho-phenolic sulfilimines, sigmatropic rearrangements were introduced to the field of sulfiliminechemistry. Herein we report a N-H sulfenylation/[2,3]-sigmatropic rearrangement cascade reaction. This mild reaction enables commercially available thiols to serve as the sulfenylation reagent and generates water as the sole byproduct. Moreover, the reaction
Rhodium(III)-Catalyzed Redox-Neutral Coupling of<i>N</i>-Phenoxyacetamides and Alkynes with Tunable Selectivity
作者:Guixia Liu、Yangyang Shen、Zhi Zhou、Xiyan Lu
DOI:10.1002/anie.201300881
日期:2013.6.3
Give it a tweak: A novel oxidizing directing group was developed for a rhodium(III)‐catalyzed CH functionalization of N‐phenoxyacetamides with alkynes. A small change in the reaction conditions leads to either ortho‐hydroxyphenyl‐substituted enamides or cyclization to deliver benzofurans with high selectivity (see scheme; Cp*=C5Me5).
给它一个调整:一种新颖的氧化定向基团被用于铑(III)催化的开发Ç h的官能Ñ与炔-phenoxyacetamides。反应条件的微小变化会导致邻-羟苯基取代的酰胺或环化反应以高选择性提供苯并呋喃(参见方案; Cp * = C 5 Me 5)。
Rhodium(<scp>iii</scp>)-catalyzed C–H activation/[4+3] annulation of N-phenoxyacetamides and α,β-unsaturated aldehydes: an efficient route to 1,2-oxazepines at room temperature
cobalt(III)-catalyzed, redox-neutral, intermolecular carboamination of propiolates and bicyclic alkenes was developed. This non-annulative coupling strategy features atom economy, high regioselectivity, good yields, and functional groups tolerance. Such a carboamination reaction was applied to modified phenolsfrom the corresponding phenols under mild conditions.
Fluorous Tagged <i>N</i>-Hydroxy Phthalimide for the Parallel Synthesis of <i>O</i>-Aryloxyamines
作者:Florence S. Gaucher-Wieczorek、Ludovic T. Maillard、Bernard Badet、Philippe Durand
DOI:10.1021/cc100098v
日期:2010.9.13
The parallel synthesis of O-aryloxyamines remains an unfulfilled need in the field of medicinal chemistry and fragment-based approaches. To fill this gap a solution-phase two-step process based on (1) a copper-catalyzed cross-coupling of aryl boronic acids with a fluorous tagged N-hydroxyphthalimide, and (2) a supported aminolysis was designed and optimized using Taguchi’s method. A library of O-aryloxyamines